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梨树栽植时期与相应树体效应的调查报告
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作者 吴炳奇 宋如杰 《河北林业科技》 北大核心 1989年第4期45-50,共6页
梨树栽植时期,有春栽和秋栽。秋栽利于根系伤口的愈合,春栽根系伤口愈合时间短,易出现“假活”现象。不同地区可根据当地气侯、土壤及水分状况而采用相应的栽植时期。梨树的栽植时期在本地区很不一致,春栽与秋裁并存。春栽与秋栽的效果... 梨树栽植时期,有春栽和秋栽。秋栽利于根系伤口的愈合,春栽根系伤口愈合时间短,易出现“假活”现象。不同地区可根据当地气侯、土壤及水分状况而采用相应的栽植时期。梨树的栽植时期在本地区很不一致,春栽与秋裁并存。春栽与秋栽的效果如何?我们对饶阳县官亭乡的4个村,1987年秋栽的1294亩(43316株),东曹芦村春栽的200余亩(9680余株)梨树,进行了随机抽样调查,现将结果介绍如下: 展开更多
关键词 梨树 栽值 树体效应
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Overview of Pharmacological & Ecological Research of Scirpus tabernaemontani Gmel 被引量:5
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作者 巩江 徐文进 +6 位作者 马亚荣 张小伟 赵冬冬 胡家华 宇磊 黄海艳 倪士峰 《Agricultural Science & Technology》 CAS 2015年第3期493-496,共4页
On the basis of extensive literature search, the species, ingredients, pharmacology, clinical applications, ecological value and cultivation techniques of Scirpus tabemaemontani Gmel have been reviewed, to provide sci... On the basis of extensive literature search, the species, ingredients, pharmacology, clinical applications, ecological value and cultivation techniques of Scirpus tabemaemontani Gmel have been reviewed, to provide scientific data for further research & development. 展开更多
关键词 Scirpus tabemaemontani Gmel PHARMACOLOGY Clinical applications Ecological value Cultivation techniques
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红花尔基沙地樟子松造林技术 被引量:5
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作者 白景阳 《内蒙古林业》 1995年第11期18-18,共1页
红花尔基沙地樟子松造林技术本栏编辑程月华白景阳红花尔基林业局位于呼伦贝尔草原沙地与大兴安岭山地接壤地带,境内主要为松林沙土、生草沙土、黑钙土、灰色森林上,年均降水量344~375毫米,年均气温-1.5℃,适宜樟子松林... 红花尔基沙地樟子松造林技术本栏编辑程月华白景阳红花尔基林业局位于呼伦贝尔草原沙地与大兴安岭山地接壤地带,境内主要为松林沙土、生草沙土、黑钙土、灰色森林上,年均降水量344~375毫米,年均气温-1.5℃,适宜樟子松林木生长。为了扩大樟子松林面积,增加... 展开更多
关键词 樟子松 造林技术 苗木 栽值
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Advances in Pharmaceutical and Ecological Value of Sagina japonica(Sw.) Ohwi
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作者 王欢 胡静波 +6 位作者 黄海艳 徐文进 尚姣 张峡 马亚荣 巩江 倪士峰 《Agricultural Science & Technology》 CAS 2015年第5期1043-1047,共5页
Sagina japonica(Sw.) Ohwi is a traditional medicinal herb for the treatment of lacquer dermatitis, and its medicinal and ecological value needs to be further developed. Based on broad literature search, this paper s... Sagina japonica(Sw.) Ohwi is a traditional medicinal herb for the treatment of lacquer dermatitis, and its medicinal and ecological value needs to be further developed. Based on broad literature search, this paper summarized the identification, composition, pharmacology, clinical applications, ecological value, and cultivation technologies of S. japonica(Sw.) Ohwi, aiming at providing scientific information for further research and development of S. japonica(Sw.) Ohwi. 展开更多
关键词 Sagina japonica (Sw.) Ohwi Identification Composition PHARMACOLOGY Clinical applications Ecological value Cultivation technologies
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对石河子冬季发展温室韭菜生产的评估
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作者 金伟玲 王学飞 《石河子科技》 1991年第5期30-32,共3页
关键词 韭菜 栽值 温室 冬季 石河子
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A New Transplanting Approach to Enhance Salt Tolerance of Tree Saplings 被引量:7
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作者 S.M.MEHDI G.HASSAN +2 位作者 A.H.SHAH M.SARFRAZ M.SADIQ 《Pedosphere》 SCIE CAS CSCD 2004年第1期77-84,共8页
A field investigation was conducted to determine the survival and growth rate of eucalyptus (Eucalyptus camaldulensis Dehn.) and guava (Psidium guajava L.) saplings planted in salt-affected soils. The field used was h... A field investigation was conducted to determine the survival and growth rate of eucalyptus (Eucalyptus camaldulensis Dehn.) and guava (Psidium guajava L.) saplings planted in salt-affected soils. The field used was highly saline-sodic in nature with a wide variation in electrical conductivity of the saturated soil extract (ECe), pHs, sodium adsorption ratio (SAR) and gypsum requirement (GR). A randomized complete block design was utilized with three treatments, i.e. T1 = plastic container bags totally removed, T2 = only the plastic container bag's base removed and T3 = plastic container bags un-removed. There were 34 and 8 plants in each block for eucalyptus and guava, correspondingly. The survival rates of eucalyptus and guava saplings were greater than 90%. In addition, gain in eucalyptus height was significantly higher in the T1 treatment where the bags were totally removed while for guava height the treatments were not significant.The gain in girth was not significant for both eucalyptus and guava saplings. With eucalyptus the taproot length was greater than the lateral roots while for guava the lateral roots were longer than the taproots.There was a decrease in the salinity-sodicity of the soils for the upper 30 cm depth under both types of vegetation, indicating that the salts had leached down to the B-horizon. 展开更多
关键词 EUCALYPTUS GUAVA salinity-sodicity salt tolerance TRANSPLANTING
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Food Value of Soft Dates Cultivated in Tunisian Coastal Oases
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作者 Mohamed Ben Salah 《Journal of Life Sciences》 2015年第5期234-241,共8页
Coastal date palm cultivars are interesting through their soft dates, their abundant and earliest production than continental cultivars. Maintaining bio-diversity in Tunisian oases has become a subject of first intere... Coastal date palm cultivars are interesting through their soft dates, their abundant and earliest production than continental cultivars. Maintaining bio-diversity in Tunisian oases has become a subject of first interest in date palm cultivation in Tunisia. Coastal oases still retain a very rich and varied plant biodiversity in comparison with the continental oases, weakened by the mono cultivation of "Deglet Nour" cultivar. Study of soft date's composition can make there well known to date consumers, help to valorize there and to help of sustainability of coastal oases ecosystem. Fresh dates from 15 cultivars was collected, dried by 80 ~C in 20-24 h. Acidity was determinate by pH meter. Sugars were appreciated by enzymatic method. Ash and minerals was calculated by photometer and spectrometer. Chemical date composition study showed that coastal date palm cultivars are predominantly rich of carbohydrates, have a low quantity of sucrose which gives them an important dietary value. Their pH varies from 5 to 6, classifies them as the best date quality for fresh consumption. Their richness in Total Nitrogen Matters and total minerals makes them at almost the same level as the other date palm eultivars analyzed by different authors in different areas of date palm production. Mineral composition showed that these dates are K and P-rich and relatively poor in Na and Ca. 展开更多
关键词 DATES coastal oases Tunisia chemical composition sugars Total Nitrogen minerals.
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Effect of Cultural Measures on Nutrient Contellts in Rice Plants with Erect Panicles 被引量:3
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作者 WANG BOLUN LIU XINAN +2 位作者 YU GUIRUI WANG SHUI and ZOU BANGJI(Shenyang Agricultural University, Shenyang 110161 (China))(Institute Of Applied Ecolopy, the Chinese Academy of Sciences, Shenyany 110015 (China))(Received November 8, 1998 revised December 21, 1998) 《Pedosphere》 SCIE CAS CSCD 1999年第3期259-264,共6页
Field experiments were carried out with rice variety of Shennong 91 of short culms and erect panicles to study nutrient contents in high-yielding rice plants and to increase rice yield by appropriate fertilization.Nit... Field experiments were carried out with rice variety of Shennong 91 of short culms and erect panicles to study nutrient contents in high-yielding rice plants and to increase rice yield by appropriate fertilization.Nitrogen, phosphorus, potassium, magnesium, zinc, manganese, iron and copper contents in rice plants varied with different treatment factors. The relationship between the nutrient contents and treatment factors could be simulated using a multiple quadratic equation. The nutrient contents in plants should be appropriate for high-yielding rice. If the mean nutrient content in rice plants producing 11 t ha-1 or more of grain (μj) was set as the standard value and the standard deviation (σj) was set as the range of variation, the nutrient content in high-yielding rice plants should be μj±1.99σj. Rice leaves were sensitive to the nutrient elements. Heavy nitrogen dressing increased the content of nitrogen in rice plants. Sparse transplanting also increased nitrogen content. Improper application of nitrogen, phosphorus and potassium could affect the nutrient contents and decrease the grain yield. 展开更多
关键词 high yield nutrient content rice plant with erect panicles
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Early Development of Silvetia babingtonii(Fucales, Phaeophyceae)
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作者 WANG Gaoge WEI Xiaojiao +3 位作者 SHUAI Limei LU Bojun WANG Shasha KANG Dongdong 《Journal of Ocean University of China》 SCIE CAS 2014年第4期677-682,共6页
Silvetia babingtonii is a potentially economic brown alga for sources of food and high-value added utilization. So far, sporeling nursery and field cultivation has not been successful. The lack of knowledge on develop... Silvetia babingtonii is a potentially economic brown alga for sources of food and high-value added utilization. So far, sporeling nursery and field cultivation has not been successful. The lack of knowledge on development and life cycle of this alga hinder the development of techniques for the sporeings and cultivation. In this study, internal structure of oogonium and antherium of S. babingtonii was observed with hematoxylin and eosin staining and through microscope. Meanwhile, early development from zygotes to juvenile sporelings was studied at 20℃ under 60–100 μmol photons m-2 s-1. Zygotes germinated and divided into thallus and rhizoid cells. The larger thallus cells further divided and developed into juvenile sporelings; while the smaller rhizoid cells divided and elongated into rhizoid hairs. These findings documented the life cycle of S. babingtonii and provided fundamental knowledge for sporeling nursery in the near future. 展开更多
关键词 Silvetia babingtonii conceptacles early development life cycle receptacles
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Food security status in rural areas of Mizoram,Northeast India
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作者 Vishwambhar Prasad SATT Lalrinpuia VANGCHHIA 《Journal of Mountain Science》 SCIE CSCD 2017年第4期795-805,共11页
Rural areas practice subsistence of the Mizoram state, India agriculture where shifting cultivation dominates the farming systems. As a result, output from crops is very low and thus, the rural areas suffer from food ... Rural areas practice subsistence of the Mizoram state, India agriculture where shifting cultivation dominates the farming systems. As a result, output from crops is very low and thus, the rural areas suffer from food insecurity. This paper analyses food security status in the rural areas of Mizoram and suggests the measures to attain food security. A case study of 16 villages, lying in all the eight districts of Mizoram, was conducted in 2014 and 1527 households (76%) out of total 2010 households were surveyed through purposive random sampling method. Structured questionnaire was constructed and questions on three food security components and 13 indicators were asked. We used Z score technique to calculate data and finally got a composite score of all the components of food security. Our result shows that food availability in the study villages is very less as composite score stands for o.oo3 whereas food accessibility is comparatively higher, mainly due to availability of fair price shops (mean value is one), high agricultural working population (40.1%) and high literacy rate (70.6%). Therefore, its composite score is 0.236. Food stability scores only -0.062 and finally overall food security stands for 0.178, which is inadequate. We have suggested that‘system rice intensification', which is already in practice, should be given priority. Adequate irrigation facilities, proper public distribution system, cultivation of fruits and vegetables, value addition in farm products and access to market may achieve food security. 展开更多
关键词 Food availability Food accessibility Food stability Food security Mizoram
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Sulfosulfuron Persistence in Soil Under Different Cultivation Systems of Wheat(Triticum aestivum)
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作者 Marziyeh YOUSEFI Behnam KAMKAR +1 位作者 Javid GHEREKHLOO Rohollah FAEZ 《Pedosphere》 SCIE CAS CSCD 2016年第5期666-675,共10页
Many sulfonylurea herbicides have been used under a wide variety of agronomic conditions in numerous crops. An understanding of dissipation rate of herbicide is fundamental for predicting the fate of herbicide in soil... Many sulfonylurea herbicides have been used under a wide variety of agronomic conditions in numerous crops. An understanding of dissipation rate of herbicide is fundamental for predicting the fate of herbicide in soil. In order to study the sulfosulfuron persistence under different cultivation systems of wheat, a four replicated experiment was carried out in the Hashemabad Reaserch Center of Gorgan, Iran in 2010 in a split plot design with two factors. Cultivation system as the main factor consisted of six levels, including conservation tillage by Combinate, no-tillage by Baldan grain drill, conservation tillage by Chizelpacker, conservation tillage by Delta Model, surface tillage by heavy disk, and conventional tillage by moldboard plow and twice disk. Secondary factor included two levels of sulfosulfuron application(with and without sulfosulfuron). Soil samples were taken at 6 stages and soil microbial respiration and soil pH were measured as factors affecting sulfosulfuron persistence. Results showed the least time of sulfosulfuron persistence belonged to the cultivation system of no-tillage by Baldan grain drill with a half-life of 4.62 d. Then, conservation tillage by Combinate and conventional tillage with a half-life of 6.30 d and conservation tillage by Delta Model with a half-life of 9.90 d were ordered. The most time of sulfosulfuron persistence(11.55 d) was related to conservation tillage by Chizelpacker. Ninety percent reduction of sulfosulfuron concentration occurred 15.34, 20.92, 32.88, and 36.38 d after sulfosulfuron application, respectively, for no-tillage system, conservation tillage by Combinate and conventional tillage, conservation tillage by Delta Model and surface tillage, and conservation tillage by Chizelpacker. In all the cultivation systems, toxicity symptoms were not observed 40 d after spraying sulfosulfuron onto the tomato plants which were used as test plant. Effects of different cultivation systems on soil microbial respiration were also significant. 展开更多
关键词 BIOASSAY conservation tillage conventional tillage HALF-LIFE soil microbial respiration surface tillage
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