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Study of Physicochemical Properties of Some Traditional Vegetables in Ivory Coast: Seeds of <i>Beilschmiedia mannii</i>(Lauraceae), Seeds of <i>Irvingia gabonensis</i>(Irvingiaceae) and <i>Volvariella volvaceae</i> 被引量:1
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作者 Alexis Drogba Sahoré Jean Gnopo Nemlin Achille Fabrice Tetchi 《Food and Nutrition Sciences》 2012年第1期14-17,共4页
Samples of fresh Volvariella volvaceae, dry seeds of Irvingia gabonensis and dry seeds of Beilschmiedia mannii), three traditional vegetables found on the market in Abidjan were studied in relation to their nutrients ... Samples of fresh Volvariella volvaceae, dry seeds of Irvingia gabonensis and dry seeds of Beilschmiedia mannii), three traditional vegetables found on the market in Abidjan were studied in relation to their nutrients composition (protein, fat, carbohydrates), energy value, moisture, ash and minerals (Ca, Na, K, Mg, Fe). The results show that: Volvariella vol- vaceae is mushroom distinguished by its high rate of moisture (81% ± 0.530% fresh matter), high carbohydrate content (79.440% ± 0.24% dry matter) and protein content (17.010% ± 0.04% dry matter) very significant. Mineral composition contains more Na (1.880% ± 0.02% dry matter) and K (1.260% ± 0.12% dry matter). Seed of Irvingia gabonensis is rich in lipid (63.610% ± 0.70% dry matter) but it also contains appreciable levels of carbohydrates (23.250% ± 0.17% dry matter), protein (7.230% ± 0. 80% dry matter) and mineral matter (5.910% ± 0, 30% dry matter). These seeds of Irvingia gabonensis contain more K (0.678% ± 0.01% dry matter) and Ca (0.452% ± 0.09% dry matter). Seed of Beil- schmiedia mannii is rich in carbohydrates (92.080% ± 1.20% dry matter), and has a significant protein content (7.160% ± 0.11% dry matter), its mineral composition contains more than K (0.872% ± 0.05% dry matter). 展开更多
关键词 vegetableS MUSHROOM Volvariella volvaceae Irvingia gabonensis Beilschmiedia mannii seedS
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Vegetable Seed Production and Marketing in China
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作者 Zou Xuexiao Hunan Academy of Agricultural Sciences, Changsha 410125, China 《Agricultural Science & Technology》 CAS 2002年第1期8-12,共5页
Since 1980s achievements and experience in vegetable breeding, seed production, preservation, quality test, packing and marketing in China are reviewed.
关键词 vegetable seed seed production seed MANAGEMENT
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Seed Germination and Vegetative Propagation of Promising Decorative Lonicera tatarica L. (Caprifoliaceae Juss.), Introduced into the Tashkent Botanical Garden (Uzbekistan)
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作者 Sobitjon S. Nosirov Nargiza K. Rakhimova Asilbek Kh. Matismoilov 《American Journal of Plant Sciences》 CAS 2023年第4期496-505,共10页
Seed germination (in laboratory and field conditions) and vegetative reproduction (by cuttings) of a promising decorative species—Lonicera tatarica L. (Caprifoliaceae Juss.) was studied for the first time in the cond... Seed germination (in laboratory and field conditions) and vegetative reproduction (by cuttings) of a promising decorative species—Lonicera tatarica L. (Caprifoliaceae Juss.) was studied for the first time in the conditions of introduction of the Tashkent Botanical Garden of Uzbekistan. Thus, the optimal temperature for germination of L. tatarica seeds in laboratory conditions is +20°C + 22°C, at which germination was 73%. The germination rate of seeds sown in autumn in the field was 62%, and the germination rate of seeds sown in spring was 71%. It was noted that in greenhouse conditions at an air temperature of 20°C - 22°C and a relative humidity of 49% - 53%, the rootability of cuttings was 75%. It was revealed that the studied species adapted well to the conditions of introduction. Taking into account the effectiveness of vegetative reproduction of L. tatarica, it can be recommended for improving the aesthetic condition and landscaping of cities, landscaping and landscape design. 展开更多
关键词 Lonicera tatarica Introduction Promising DECORATIVE seed Germination vegetative Reproduction CUTTINGS Tashkent Botanical Garden Uzbekistan
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Profitability of Improved versus Traditional Cultivation Practices for African Indigenous Vegetables
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作者 Onesmus Semalulu Simon Okello +2 位作者 Robinah Gafabusa Naggayi Phyllis Kasambula Hongsik Shim 《Journal of Agricultural Science and Technology(B)》 2020年第1期1-9,共9页
Vegetables are important for nutrition and income of rural and urban households.However,vegetable consumption in Uganda is below World Health Organization(WHO)recommended guidelines,partly due to low production.The pe... Vegetables are important for nutrition and income of rural and urban households.However,vegetable consumption in Uganda is below World Health Organization(WHO)recommended guidelines,partly due to low production.The persistent low production arises from poor cultivation methods,low soil fertility,poor quality seed,pests and diseases,among others.This study compared the profitability of improved cultivation methods for African indigenous vegetables(AIVs),i.e.,pure stand and in lines,versus traditional practice(mixing seeds of different AIVs then broadcast),both for leafy and seed production.The AIVs included:Nakati(Solanum aethiopicum L.),Bugga(Amaranthus blitum L.)and Jobyo(Gynadropsis gynandra L.),arranged in completely randomized(CR)design with three replicates.Results showed that Nakati was more profitable when grown for leafy compared to seed production with benefit:cost ratio(BCR)9.2 and 4.0 for leafy and seed,respectively.Bugga for seed was more profitable compared to leafy production(BCR 18.0 and 2.7 for seed and leafy,respectively).Growing Jobyo for seed was more profitable than leafy production(BCR 14.9,2.4 for seed and leafy,respectively).Growing indigenous vegetables(IVs)for seed in mixed broadcast system,out of the three IVs farmers stand to economically maximize benefits for one crop(BCR 0.9,1.7 and 10.2 for Bugga,Nakati and Jobyo,respectively)compared to pure stand and in lines(BCR 18.0,4.2 and 14.9 for Bugga,Nakati and Jobyo,respectively).Thus,famers stand to benefit more if they grow IVs as pure stand and in lines as opposed to mixed and broadcast,whether for leafy or seed production. 展开更多
关键词 Indigenous vegetableS INTENSIFICATION benefit-cost ratio PROFITABILITY vegetable seed
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The potential of Strychnos madagascariensis(Poir.)as a source of vegetable oil
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作者 Godfrey Elijah Zharare Arindo Lukawu Akweni +1 位作者 Mathilda Mostert Andrew Rowland Opoku 《Food Bioscience》 SCIE 2022年第4期133-144,共12页
A study was undertaken to quantify screw press-extractable oil in the seed coat of Strychnos madagascariensis(Poir.)fruits harvested from trees in the northern coastal plain of KwaZulu-Natal province of South Africa a... A study was undertaken to quantify screw press-extractable oil in the seed coat of Strychnos madagascariensis(Poir.)fruits harvested from trees in the northern coastal plain of KwaZulu-Natal province of South Africa and to determine the physiochemical properties and fatty acid composition of the oil.The seed coat constituted 19.36%of the dry fruit biomass and contained w/w 42%oil.Thus,the oil yield of the dried fruit was approx.8.13%.Monounsaturated oleic acid accounted for between ca.70-73%of the total fatty acids in the Strychnos oil.Palmitic acid was present in amounts ranging between 15.05 and 16.27%.Also present,but in smaller amounts were cis linoleic acid(5.76-6.03%),stearic acid(1.64-4.65%),n3 linolenic acid(1.26-1.90%),and palmitoleic acid(1.10-1.65%).The oil contained trace amounts of arachidic acid(0.45-0.54%)and eicosenoic acid(approx.0.325%).Vitamin E was present in appreciable amounts,mostly in the form ofα-tocopherol(approx.5.8-14.4 mg/100 g oil)andβ-tocotrienol(approx.8.1-15.6 mg/100 g oil)homologues.The downside was that the oil had high acid values(161-181.32 mg KOH/g)and free fatty acid content(66-81 g oleic acid/100 g oil).There were 141 volatile compounds detected in the Strychnos oil,the most dominant of which were butyl-butyrate(20%),butyl hexanoate(8.2%)and glycerol(6.1-6.7%).Overall,the results indicate that Strychnos madagascariensis has potential as a source of vegetable oil. 展开更多
关键词 Fatty acids Oleic acid seed coat Strychnos madagascariensis vegetable oil Vitamin E
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Institutionalisation of Genetic Resource Management with Farmers: Cases of Traditional Vegetables in Japan
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作者 Aki Imaizumi Shuji Hisano 《Journal of Agricultural Science and Technology(B)》 2013年第6期399-413,共15页
Nearly all countries have seed organisations and private seed companies, laws and technical regulations to govern their while the role of the farmers' seed system has formal seed system, run by formal public been mar... Nearly all countries have seed organisations and private seed companies, laws and technical regulations to govern their while the role of the farmers' seed system has formal seed system, run by formal public been marginalised especially in developed countries. Local traditional varieties that are largely taken care of and nurtured by farmers' seed system have also been excluded from the formal seed system. Nowadays, however, it is quite common to see locally-sourced vegetables on supermarket shelves, while an increasing number of consumers visit farmers' market and become aware of local traditional vegetables available only through such channels. It is in this context that many local governments, public agricultural experimental stations and even private seed companies are becoming interested in the use and management of local traditional varieties of vegetables in Japan. The objective of this paper is to elucidate some characteristics of and factors behind the condition, potentiality and limitations of farmers' seed systems vis-a-vis the expected role of public experimental stations and locally-based seed companies, especially when it comes to the use and management of local traditional vegetables and their genetic resources in Japan. This paper is based on our case studies, in which we conducted in some interviews with relevant local actors in addition to literature and statistical surveys. 展开更多
关键词 Farmers' seed system local vegetables genetic resources INSTITUTIONALISATION
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Effects of wind speed,underlying surface,and seed morphological traits on the secondary seed dispersal in the Tengger Desert,China
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作者 QU Wenjie ZHAO Wenzhi +3 位作者 YANG Xinguo WANG Lei ZHANG Xue QU Jianjun 《Journal of Arid Land》 SCIE CSCD 2024年第4期531-549,共19页
The maintenance of sand-fixing vegetation is important for the stability of artificial sand-fixing systems in which seed dispersal plays a key role.Based on field wind tunnel experiments using 11 common plant species ... The maintenance of sand-fixing vegetation is important for the stability of artificial sand-fixing systems in which seed dispersal plays a key role.Based on field wind tunnel experiments using 11 common plant species on the southeastern edge of the Tengger Desert,China,we studied the secondary seed dispersal in the fixed and semi-fixed sand dunes as well as in the mobile dunes in order to understand the limitations of vegetation regeneration and the maintenance of its stability.Our results indicated that there were significant variations among the selected 11 plant species in the threshold of wind speed(TWS).The TWS of Caragana korshinskii was the highest among the 11 plant species,whereas that of Echinops gmelinii was the lowest.Seed morphological traits and underlying surface could generally explain the TWS.During the secondary seed dispersal processes,the proportions of seeds that did not disperse(no dispersal)and only dispersed over short distance(short-distance dispersal within the wind tunnel test section)were significantly higher than those of seeds that were buried(including lost seeds)and dispersed over long distance(long-distance dispersal beyond the wind tunnel test section).Compared with other habitats,the mobile dunes were the most difficult places for secondary seed dispersal.Buried seeds were the easiest to be found in the semi-fixed sand dunes,whereas fixed sand dunes were the best sites for seeds that dispersed over long distance.The results of linear mixed models showed that after controlling the dispersal distance,smaller and rounder seeds dispersed farther.Shape index and wind speed were the two significant influencing factors on the burial of seeds.The explanatory power of wind speed,underlying surface,and seed morphological traits on the seeds that did not disperse and dispersed over short distance was far greater than that on the seeds that were buried and dispersed over long distance,implying that the processes and mechanisms of burial and long-distance dispersal are more complex.In summary,most seeds in the study area either did not move,were buried,or dispersed over short distance,promoting local vegetation regeneration. 展开更多
关键词 seed dispersal seed morphological traits wind speed vegetation regeneration wind tunnel Tengger Desert
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Spatiotemporal characteristics of seed rain and soil seed bank of artificial Caragana korshinskii Kom. forest in the Tengger Desert, China
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作者 SHEN Jianxiang WANG Xin +9 位作者 WANG Lei WANG Jiahui QU Wenjie ZHANG Xue CHANG Xuanxuan YANG Xinguo CHEN Lin QIN Weichun ZHANG Bo NIU Jinshuai 《Journal of Arid Land》 SCIE CSCD 2024年第4期550-566,共17页
Vegetation restoration and reconstruction are effective approaches to desertification control and achieving social and economic sustainability in desert areas.However,the self-succession ability of native plants durin... Vegetation restoration and reconstruction are effective approaches to desertification control and achieving social and economic sustainability in desert areas.However,the self-succession ability of native plants during the later periods of vegetation restoration remains unclear.Therefore,this study was conducted to bridge the knowledge gap by investigating the regeneration dynamics of artificial forest under natural conditions.The information of seed rain and soil seed bank was collected and quantified from an artificial Caragana korshinskii Kom.forest in the Tengger Desert,China.The germination tests were conducted in a laboratory setting.The analysis of species quantity and diversity in seed rain and soil seed bank was conducted to assess the impact of different durations of sand fixation(60,40,and 20 a)on the progress of vegetation restoration and ecological conditions in artificial C.korshinskii forest.The results showed that the top three dominant plant species in seed rain were Echinops gmelinii Turcz.,Eragrostis minor Host.,and Agropyron mongolicum Keng.,and the top three dominant plant species in soil seed bank were E.minor,Chloris virgata Sw.,and E.gmelinii.As restoration period increased,the density of seed rain and soil seed bank increased first and then decreased.While for species richness,as restoration period increased,it gradually increased in seed rain but decreased in soil seed bank.There was a positive correlation between seed rain density and soil seed bank density among all the three restoration periods.The species similarity between seed rain or soil seed bank and aboveground vegetation decreased with the extension of restoration period.The shape of the seeds,specifically those with external appendages such as spines and crown hair,clearly had an effect on their dispersal,then resulting in lower seed density in soil seed bank.In addition,precipitation was a crucial factor in promoting rapid germination,also resulting in lower seed density in soil seed bank.Our findings provide valuable insights for guiding future interventions during the later periods of artificial C.korshinskii forest,such as sowing and restoration efforts using unmanned aerial vehicles. 展开更多
关键词 ecological restoration soil seed bank seed rain artificial forest vegetation desertification Caragana korshinskii Tengger Desert
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Characteristics of soil seed bank in plantation forest in the rocky mountain region of Beijing, China 被引量:5
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作者 HU Zeng-hui YANG Yang +3 位作者 LENG Ping-sheng DOU De-quan ZHANG Bo HOU Bing-fei 《Journal of Forestry Research》 SCIE CAS CSCD 2013年第1期91-97,共7页
We investigated characteristics (scales and composition) of soil seed banks at eight study sites in the rocky mountain region of Beijing by seed identification and germination monitoring. We also surveyed the vegeta... We investigated characteristics (scales and composition) of soil seed banks at eight study sites in the rocky mountain region of Beijing by seed identification and germination monitoring. We also surveyed the vegetation communities at the eight study sites to explore the role of soil seed banks in vegetation restoration. The storage capacity of soil seed banks at the eight sites ranked from 766.26 to 2461.92 seeds·m?2. A total of 23 plant species were found in soil seed banks, of which 63–80% of seeds were herbs in various soil layers and 60% of seeds were located in the soil layer at 0–5 cm depth. Biodiversity indices indicated clear differences in species diversity of soil seed banks among different plant communities. The species composition of aboveground vegetation showed low similarity with that based on soil seed banks. In the aboveground plant community, the afforestation tree species showed high importance values. The plant species originating from soil seed banks represented natural regeneration, which also showed relatively high importance values. This study suggests that in the rocky mountain region of Beijing the soil seed banks played a key role in the transformation from pure plantation forest to near-natural forest, promoting natural ecological processes, and the role of the seed banks in vegetation restoration was important to the improvement of ecological restoration methods. 展开更多
关键词 Rocky mountain region of Beijing soil seed bank plantcommunity plant diversity vegetation regeneration
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Soil seed banks along elevational gradients in tropical, subtropical and subalpine forests in Yunnan Province, southwest China 被引量:2
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作者 Xiaqin Luo Min Cao +4 位作者 Min Zhang Xiaoyang Song Jieqiong Li Akihiro Nakamura Roger Kitching 《Plant Diversity》 SCIE CAS CSCD 北大核心 2017年第5期273-286,共14页
Soil seed banks are a vital part of ecosystems and influence community dynamics and regeneration.Although soil seed banks in different habitats have been reported, how soil seed banks vary with elevational gradients i... Soil seed banks are a vital part of ecosystems and influence community dynamics and regeneration.Although soil seed banks in different habitats have been reported, how soil seed banks vary with elevational gradients in different climatic zones is still unknown. This paper investigates seed density,species composition and nonconstituent species of forest soil seed banks in Yunnan Province, southwest China. Similarity between the soil seed bank and standing vegetation was also examined. We collected soil samples from sites spanning 12 elevations in tropical rain forests, subtropical evergreen broadleaved forests and subalpine coniferous forests, and transported them to a glasshouse for germination trials for species identification. The soil seed banks of tropical and subtropical forests had much higher seed densities and species richness than those of subalpine forests. Seeds of woody species dominated the soil seed banks of tropical and subtropical forests, while herbs dominated those of subalpine forests.The nonconstituent species in the soil seed banks were all herbs and were most abundant in tropical forests, followed by subtropical forests but were completely absent from subalpine forests. 展开更多
关键词 Elevational gradient Soil seed bank Standing vegetation Subalpine forest Subtropical forest Tropical forest
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Can fruit seeds and undigested plant residuals cause acute appendicitis 被引量:2
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作者 Omer Engin Mehmet Yildirim +1 位作者 Savas Yakan Gulnihal Ay Coskun 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2011年第2期99-101,共3页
Objective:To investigate the relation between fruit seeds,plants residuals and appendicitis. Methods:Among cases that underwent appendectomy,the appendicitis cases having fruit seeds and undigested plant residuals in ... Objective:To investigate the relation between fruit seeds,plants residuals and appendicitis. Methods:Among cases that underwent appendectomy,the appendicitis cases having fruit seeds and undigested plant residuals in their etiology were examined retrospectively.Also, histopathological features,age,sex,and parameters of morbidity and mortality were used. Results:Fruit seed was found in one case(0.05%) with presence of pus in appendix lumen, undigested plant residuals in 7 cases(0.35%).It was determined that there were appendix inflammation in 2 of the plant residuals cases,while there were obstruction and lymphoid hyperplasia in the appendix lumen of 5 cases.No mortality was observed.Conclusions:The ratio of acute appendicitis caused by plants is minimal among all appendectomised patients, but avoidence of eating undigested fruit seeds and chewing plants well may help to prevent appendicitis. 展开更多
关键词 Acute APPENDICITIS Fruit-vegetable consumption BEZOAR FRUIT seed
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Effects of degradation and species composition on soil seed density in the alpine grasslands, China
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作者 LI Chunming MA Jiahui +5 位作者 LI Liangyu HUANG Junlin LU Jinhua HUANG Mei Allan DEGEN SHANG Zhanhuan 《Journal of Arid Land》 SCIE CSCD 2023年第12期1510-1528,共19页
Grassland degradation can alter the structure and function of ecosystem and soil seed bank.Therefore,estimating the role of soil seed bank in vegetation regeneration of degraded grasslands is crucial.We selected grass... Grassland degradation can alter the structure and function of ecosystem and soil seed bank.Therefore,estimating the role of soil seed bank in vegetation regeneration of degraded grasslands is crucial.We selected grasslands with three levels of degradation,namely non-degraded(ND),mildly degraded(MD),and heavily degraded(HD)to analyze the effect of grassland degradation on soil seed bank,as well as the role of soil seed bank on vegetation regeneration of the alpine grasslands,China.Soil samples from each level were collected in May,before seedling emergence,in August,after completion of transient seed bank germination,and in December,after seed dispersal,to determine the seed density and species composition through germination experiment.Result showed that a total of 35 plant species was identified,including 15 species observed in both soil seed bank and above-ground vegetation.A total of 19,15,and 14 species of soil seed bank were identified in December,May,and August,respectively.The most abundant species in soil seed bank were Compositae(5 species),followed by Poaceae(4 species),and Cyperaceae(3 species).Degradation level has no significant impact on species richness and Shannon-Wiener index of soil seed bank.In addition,sampling month and grassland degradation affected soil seed bank density,in which December>May>August,and ND>MD>HD,indicating that density of transient seed bank was greater than persistent seed bank.Soil seed bank density of surface layer(0–5 cm)accounting for 42%–72%of the total density,which was significantly higher than that of deep layer(5–10 cm).Similarity of species composition between vegetation and soil seed bank was low,and it increased with degradation level(ranged from 0.14 to 0.69).We concluded that grassland degradation affects soil seed bank density more than species diversity,and soil seed bank contributed slightly to vegetation regeneration of degraded alpine grassland.Therefore,it is unlikely that degraded alpine meadow can be restored solely through soil seed bank. 展开更多
关键词 DEGRADATION transient soil seed bank persistent soil seed bank seed density vegetation regeneration
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Use of Unmanned Aerial System (UAS) Phenotyping to Predict Pod and Seed Yield in Organic Peanuts
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作者 Aurora Manley Waltram Ravelombola +6 位作者 John Cason Brian Bennett Hanh Pham Emi Kimura Caroline Ruhl Waqas Ahmad Madeline Brown 《American Journal of Plant Sciences》 CAS 2023年第3期415-426,共12页
Peanut (Arachis hypogaea L.) is a highly nutritious food that is an excellent source of protein and is associated with increased coronary health, lower risk of type-2 diabetes, lower risk of breast cancer and a health... Peanut (Arachis hypogaea L.) is a highly nutritious food that is an excellent source of protein and is associated with increased coronary health, lower risk of type-2 diabetes, lower risk of breast cancer and a healthy profile of inflammatory biomarkers. The domestic demand for organic peanuts has significantly increased, requiring new breeding efforts to develop peanut varieties adapted to the organic farming system. The use of unmanned aerial system (UAS) has gained scientific attention because of the ability to generate high-throughput phenotypic data. However, it has not been fully investigated for phenotyping agronomic traits of organic peanuts. Peanuts are beneficial for cardio system protection and are widely used. Within the U.S., peanuts are grown in 11 states on roughly 600,000 hectares and averaging 4500 kg/ha. This study’s objective was to test the accuracy of UAS data in the phenotyping pod and seed yield of organic peanuts. UAS data was collected from a field plot with 20 Spanish peanut breeding lines on July 07, 2021 and September 27, 2021. The study was a randomized complete block design (RCBD) with 3 blocks. Twenty-five vegetation indices (VIs) were calculated. The analysis of variance showed significant genotypic effects on all 25 vegetation indices for both flights (p < 0.05). The vegetation index Red edge (RE) from the first flight was the most significantly correlated with both pod (r = 0.44) and seed yield (r = 0.64). These results can be used to further advance organic peanut breeding efforts with high-throughput data collection. 展开更多
关键词 PEANUT Unmanned Aerial System vegetation Indices PHENOTYPING Pod Yield seed Yield
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General Survey of Soil Seed Bank in China
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作者 Zhaoqing LI Jingli XUE Jie LU 《Asian Agricultural Research》 2017年第7期61-64,69,共5页
Soil seed bank refers to the sum of upper litter decay and all survival seeds in the soil. It plays a unique role in restoring the surface vegetation and protecting biodiversity. Chinese scholars have carried out exte... Soil seed bank refers to the sum of upper litter decay and all survival seeds in the soil. It plays a unique role in restoring the surface vegetation and protecting biodiversity. Chinese scholars have carried out extensive researches on the soil seed bank,and have obtained considerable achievements. On the basis of reading extensive literature,this paper summarized the current research results and found that the research contents of soil seed bank in China mainly involve the following aspects:( i) research method of soil seed bank;( ii) classification system of soil seed bank;( iii) spatial pattern of soil seed bank;( iv) relationship between soil seed bank and surface vegetation;( v) dynamic characteristic and seedling replanting of soil seed bank;( vi) application of soil seed bank in vegetation restoration. On the basis of the above summary,it came up with existing problems and future research direction of China's soil seed bank from system construction,field observation,disciplinary combination,interference factors,and community succession. 展开更多
关键词 Soil seed bank vegetation restoration Spatial pattern Current research situation
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Phosphorus Containing Rubber Seed oil as a Flame Retardant Plasticizer for Polyvinyl Chloride
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作者 Hongying Chu Huabei Li +1 位作者 Xiaoyan Sun Yaowang Zhang 《Journal of Renewable Materials》 SCIE EI 2023年第4期1731-1743,共13页
The application of phthalate plasticizers has been restricted around the world due to their poor migration and potential harm to the human body.Hence,producing functional bio-based plasticizers via exploiting clean an... The application of phthalate plasticizers has been restricted around the world due to their poor migration and potential harm to the human body.Hence,producing functional bio-based plasticizers via exploiting clean and reusable resources meets the satisfaction of current demands.In this study,flame-retardant rubber seed oil-based plasticize(FRP)was prepared via epoxidation reaction and ring opening addition reactions,which was used as a flame-resistant plasticizer for polyvinyl chloride to replace petroleum-based phthalate plasticizer.When DOP was replaced with FRP,the torque of PVC blends increased from 11.4 to 18.4 N⋅m,the LOI value increased from 24.3%for PVC-FRP-0%to 33.1%for PVC-FRP-20.The THR value diminished from 39 MJ/m^(2)(pertaining to PVC-FRC-0)to 22 MJ/m^(2)Tg increased from 23°C to 47°C,the weight loss of plasticized PVC blends significantly reduced from 22.6%to 2.8%in leaching tests.The study provided a new way to prepare flame retardant plasticizer using rubber seed oil as raw material. 展开更多
关键词 PLASTICIZER rubber seed oil polyvinyl chloride vegetable oil modification
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Physiological and Phytosanitary Potentials of Coriander and Radish Seeds
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作者 Jucilayne Femandes Vieira Francisco Amaral Villela Orlando Antonio Lucca Filho Raifer Simoes Campelo 《Journal of Agricultural Science and Technology(A)》 2013年第2期126-130,共5页
Information on seed vigor of the vegetable crops is always important and necessary due to the increasing demand of high quality seeds for sowing and high-value commercial. The cultivation of these species, conducted i... Information on seed vigor of the vegetable crops is always important and necessary due to the increasing demand of high quality seeds for sowing and high-value commercial. The cultivation of these species, conducted intensively, should be established with seed high potential physiological and health for the development of a more productive and sustainable agriculture. The present study was conducted to evaluate the potential physiological of seed lots of radish and coriander. The experiment was conducted at the laboratory of seed analysis and greenhouse of the plant science department of the Federal University of Pelotas in South Brazil. Four radish seed lots, cultivar "Saxa", and four coriander seed lots, cultivar "Verdito" were used. Germination seed test, first count of germination, accelerated aging test, electrical conductivity and seedling emergence were used to evaluate the physiological quality of the lots. The experimental design was completely randomized design with five replications. Means were compared by Tukey test. The accelerated aging test was the most efficient test in assessing the physiological quality for both lots of radish seeds and coriander and this test provide coherent results with seedlings emergence. 展开更多
关键词 Radish (Raphanus sativus L.) coriander (Coriandrum sativum L.) vegetable crops seed quality seed vigor.
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石羊河尾闾青土湖土壤种子库特征及其与地上植被的关系 被引量:1
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作者 赵艳丽 安富博 +4 位作者 郭树江 赵赫然 王飞 李雪娇 宋德伟 《西北林学院学报》 CSCD 北大核心 2024年第4期170-177,共8页
为探究土壤种子库在石羊河尾闾青土湖植物保护中的作用及其在生态恢复中的潜力,选择青土湖湖心向外辐射的西北、正东、东南方向上的3条样线,采用野外植被样方调查与种子萌发试验相结合的方法,对青土湖土壤种子库组成、空间分布及其与地... 为探究土壤种子库在石羊河尾闾青土湖植物保护中的作用及其在生态恢复中的潜力,选择青土湖湖心向外辐射的西北、正东、东南方向上的3条样线,采用野外植被样方调查与种子萌发试验相结合的方法,对青土湖土壤种子库组成、空间分布及其与地上植被的关系进行研究。结果表明,1)青土湖区土壤种子库共出现9种植物,分属6科9属,以藜科植物最多,生活型以1年生草本植物种子比例最高,占到51.86%~94.32%,而灌木植物所占比例很小。2)土壤种子库密度介于0~1 516.67粒·m^(-2),平均土壤种子库密度表现为正东方向>东南方向>西北方向;土壤种子库分布主要集中在0~2 cm土层中,种子库密度随土层深度的增加呈降低趋势。3)青土湖土壤种子库物种多样性指数从湖心向外辐射呈现先增加后降低的趋势,表现为正东方向>东南方向>西北方向。4)青土湖周边土壤种子库和地上植被的平均相似性系数均较低,在0.03~0.20,属极不相似水平,说明在物种组成上差异显著。研究结果可为青土湖周边植被恢复与重建提供科学依据和支撑。 展开更多
关键词 土壤种子库 物种多样性 地上植被 青土湖
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Valorization of Griffonia simplicifolia Seed Oil for Biodiesel Production: A Sustainable Alternative
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作者 Kosi Mawuéna Novidzro Kwami Aldo Eric Kolor +1 位作者 Sassou Megnassan Kossi Honoré Koumaglo 《Engineering(科研)》 2023年第11期759-781,共23页
Bio-derived oxygenated hydrocarbons, such as mixtures of fatty acid methyl esters (biodiesel), are promising alternatives for alleviating the adverse effects of fossil fuel consumption on climate change and preventing... Bio-derived oxygenated hydrocarbons, such as mixtures of fatty acid methyl esters (biodiesel), are promising alternatives for alleviating the adverse effects of fossil fuel consumption on climate change and preventing petroleum resource depletion. However, the selection of a viable feedstock for competitive biodiesel production remains challenging. Recent studies focusing on Griffonia simplicifolia seeds, the sole plant industrially exploited for 5-hydroxy- tryptophan (5-HTP) extraction, have shown that G. simplicifolia seed oil (GSO) can be solvent-extracted directly from ground seeds or the remaining seed cakes obtained after 5-HTP extraction with quantitative yields. This work documents the conversion of GSO into biodiesel through homogeneous base-catalyzed transesterification. The refractive index and density of the obtained methyl ester mixtures decreased with increasing oil-to-methanol molar ratio, reaction temperature, and time. Under specific conditions, 1.43 wt% FFA oil, 63.5C, 60 min, and 1:9 oil/MeOH molar ratio with 1.2 wt% NaOH or 1.3 wt% KOH as catalysts, optimal reaction conditions were reached. There were no significant differences in the potential for diminution of the refractive index and density between the NaOH and KOH catalysts. The predicted fuel properties based on the fatty acid composition determined by GC-MS showed that G. simplicifolia biodiesel exhibited a cetane index of 50.29, volumetric energy density of 34.97 MJ/L, cloud point of -1.03°C, kinematic viscosity of 4.07 mm<sup>2</sup>/s, and oxidative stability of 0.65 h. Apart from its unfavorable oxidative stability and slightly lower energy density compared to petrodiesel, all other calculated parameters met the current standards. The valorization concept proposed in this study should be integrated into the 5-HTP extraction process, preferably using the remaining dry seed cakes as raw materials to maximize revenue in a bioeconomic and sustainable approach. 展开更多
关键词 Griffonia simplicifolia seed Cakes vegetable Oil BIODIESEL
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蔬菜穴盘育苗播种漏播检测及智能补种装置设计与试验 被引量:2
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作者 马旭 杨传艺 +5 位作者 谭穗妍 曹秀龙 秦亦娟 陈嘉盈 余杰 王曦成 《农业工程学报》 EI CAS CSCD 北大核心 2024年第6期168-180,共13页
为保证植物工厂蔬菜穴盘育苗高质量作业要求,该研究在气吸滚筒式蔬菜穴盘育苗精密播种器的基础上,优化设计了在线漏播检测与智能补种装置,以可编程逻辑控制器(programmable logic controller,PLC)为控制核心,实时进行播种器吸孔漏吸检... 为保证植物工厂蔬菜穴盘育苗高质量作业要求,该研究在气吸滚筒式蔬菜穴盘育苗精密播种器的基础上,优化设计了在线漏播检测与智能补种装置,以可编程逻辑控制器(programmable logic controller,PLC)为控制核心,实时进行播种器吸孔漏吸检测及穴盘穴孔漏播位置预报,并完成漏播穴孔的定点定穴补种。采用光电检测技术检测播种器吸孔漏吸位置,构建漏吸吸孔与育苗穴盘穴孔的对应动态补种矩阵,实现穴盘穴孔漏播位置精准预报;优化设计了智能补种装置,根据预报的穴盘穴孔漏播位置实现定点定穴精准补种。以中双11号菜心种子为对象,开展播种器吸孔漏吸检测与穴孔漏播位置预报试验,得到吸孔漏吸平均检测准确率为98.82%,穴孔漏播位置预报准确率为100%。采用BoxBehnken试验设计方法,对智能补种装置开展作业性能试验,构建主要性能指标(单粒合格指数、重播指数和漏播指数)与主要影响因素(吸针负压、吸针孔径和种室振动压力)的关系,并进行多目标优化,确定智能补种装置最优工作参数组合为吸针负压10.19 kPa、吸针孔径0.67 mm、种室振动压力0.07 MPa,此时补种装置播种的平均单粒合格指数为94.80%、重播指数为2.94%、漏播指数为2.26%。开展整机性能试验,在生产率为100盘/h条件下,整机的单粒合格指数由补种前的93.96%提高到98.18%;在生产率为300盘/h条件下,单粒合格指数由补种前的93.18%提高到97.89%。试验结果满足植物工厂和大田蔬菜穴盘育苗播种装置高精密播种作业要求,可提高蔬菜穴盘育苗的播种性能。 展开更多
关键词 农业机械 自动化 蔬菜穴盘育苗 漏播检测 补种
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安徽省蔬菜种业发展路径分析与对策研究
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作者 徐磊 田文楠 +3 位作者 朱莉昵 王庆 王德仪 赵宏远 《安徽农业科学》 CAS 2024年第21期257-259,共3页
从产业链角度,阐述了安徽省蔬菜种业发展现状,剖析了种质资源到蔬菜品种、种业成果到市场商品、产业难题到科研课题、政策法规到产业发展等“四个转化”过程中的问题及产生原因,提出加强种业基础性长期性科技工作、深化科研单位和企业... 从产业链角度,阐述了安徽省蔬菜种业发展现状,剖析了种质资源到蔬菜品种、种业成果到市场商品、产业难题到科研课题、政策法规到产业发展等“四个转化”过程中的问题及产生原因,提出加强种业基础性长期性科技工作、深化科研单位和企业合作等建议,为安徽省蔬菜种业发展战略提供决策参考。 展开更多
关键词 蔬菜种业 发展路径 对策 安徽省
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