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枇杷种子、幼苗处理对砧木茎粗的效应 被引量:1
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作者 吴伟民 盛宝龙 《福建果树》 1996年第3期11-13,共3页
枇杷种子、幼苗处理对砧木茎粗的效应吴伟民,盛宝龙(江苏省农科院园艺所南京210014)果树的砧木是接穗品种健壮生长和良好结果的重要条件。枇杷的砧木有本砧实生苗、石楠、等,最常用的是本砧。研究表明,枇杷实生苗的粗度与嫁... 枇杷种子、幼苗处理对砧木茎粗的效应吴伟民,盛宝龙(江苏省农科院园艺所南京210014)果树的砧木是接穗品种健壮生长和良好结果的重要条件。枇杷的砧木有本砧实生苗、石楠、等,最常用的是本砧。研究表明,枇杷实生苗的粗度与嫁接成活率之间有着一定的相关性,在粗... 展开更多
关键词 枇杷 种子处理 幼苗处理 砧木茎粗
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落叶松苗不同处理对造林成活率的影响
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作者 徐丽娟 《吉林林业科技》 北大核心 1996年第4期26-26,5,共2页
落叶松苗不同处理对造林成活率的影响徐丽娟(九台市林业局)落叶松是吉林省主要的造林树种之一,属于萌芽较早的苗木。由于我省春季气候较寒冷,而且干燥,造林季节多在4月15日至25日之间,这期间的苗木都已萌发,从而影响了落叶... 落叶松苗不同处理对造林成活率的影响徐丽娟(九台市林业局)落叶松是吉林省主要的造林树种之一,属于萌芽较早的苗木。由于我省春季气候较寒冷,而且干燥,造林季节多在4月15日至25日之间,这期间的苗木都已萌发,从而影响了落叶松造林成活率。1995年春,我们在... 展开更多
关键词 落叶松 造林 成活率 幼苗处理
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基于真空渗入遗传转化的菜薹苗态建成方法研究
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作者 张广辉 巩振辉 《河南农业大学学报》 CAS CSCD 2003年第2期161-164,共4页
采用不同时期播种和人工低温春化处理2种方法,对真空渗入法进行菜薹遗传转化的适宜苗态及其建成方法进行研究.结果表明,菜薹的适宜苗态是:植株已完成花芽分化,花薹未完全抽出,第2,3,4片真叶平均长6.0cm以上,宽3.0cm以上,茎粗4.0mm以上,... 采用不同时期播种和人工低温春化处理2种方法,对真空渗入法进行菜薹遗传转化的适宜苗态及其建成方法进行研究.结果表明,菜薹的适宜苗态是:植株已完成花芽分化,花薹未完全抽出,第2,3,4片真叶平均长6.0cm以上,宽3.0cm以上,茎粗4.0mm以上,具8~9片真叶.陕西关中地区适宜抽薹期为4月上旬.2月中旬播种于温室中,4月上旬进行真空渗入最为适宜.不同品种根据冬性强弱,种子低温(4℃)处理12~24d可以形成最适苗态.一叶一心幼苗低温(6℃)处理对苗态有显著影响,是建立适宜苗态的另一有效途径. 展开更多
关键词 菜薹 苗态建成 真空渗入 遗传转化 种子处理 幼苗处理 低温处理 播期
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Effects of Shading Treatments on Growth of Asimina triloba(L.) Dunal Seedlings
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作者 朱延林 黄建全 +4 位作者 张江涛 张娜 翟晓巧 王念 赵蓬辉 《Agricultural Science & Technology》 CAS 2007年第3期42-44,78,共4页
[Objective]The study was conducted to investigate the effects of shading treatments on growth of Asimina triloba (L) Dunal seedlings and provided the theoretical basis for seedling production. [Method]70 day-old A. ... [Objective]The study was conducted to investigate the effects of shading treatments on growth of Asimina triloba (L) Dunal seedlings and provided the theoretical basis for seedling production. [Method]70 day-old A. triloba seedlings had similar stem diameter and plant height and good growth vigour were taken as tested materials in 2005. 4 light gradient treatments which were the natural light with 100% light intensity, one-layer, two-layer and three-layer black shading network with the light transmittance rate of 50%, 25% and 12.5% were set up to study the effects of different shading treatments on growth of A. triloba. [ Result] With the shading treatments of one-layer and two-layer net, the plants of A. triloba seedlings grew rapidly. As the intensity of illumination decreased, the cetents of chlorophyll a ( Chl. a), chlorophyll b ( Chl. b) and total chlorophyll increased at first and then reduced. At the same time the chlorophyll a/b value became smaller. Under natural light, the plants tended to consume more water and the soil temperature at 15:00 p. m was higher. There was a smaller difference among various treatments. [ Conclusion]The suitable shading treatment to the growth of A. triloba seedlings was under the light transmittance rate of 50% and height and stem diameter of trees increased fast. Chlorophyll a ( Chl. a), chlorophyll b ( Chl. b) content in leaves of A. triloba seedlings were highest comparing with those in other conditions. 展开更多
关键词 Asimina triloba Shading treatment GROWTH Chlorophyll content
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巴西制定多项农化物残留限量法规
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《农产品质量与安全》 2010年第4期64-64,共1页
巴西近日发出G/SPS/N/BRA/590/59等多项通报,分别对农化物甲霜灵(metalaxyl-M)及硫线磷(cadusafos)制定残留限量法规。具体内容涉及:将甲霜灵用于甘蔗种植纳入法规.规定幼苗处理期甲霜灵的最高残留限量为0.01mg/kg:将硫... 巴西近日发出G/SPS/N/BRA/590/59等多项通报,分别对农化物甲霜灵(metalaxyl-M)及硫线磷(cadusafos)制定残留限量法规。具体内容涉及:将甲霜灵用于甘蔗种植纳入法规.规定幼苗处理期甲霜灵的最高残留限量为0.01mg/kg:将硫线磷用于甘蔗种植纳入法规. 展开更多
关键词 最高残留限量 法规 巴西 甘蔗种植 甲霜灵 幼苗处理 BRA S/N
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Effects of Hypergravity on Salt Tolerance of Wheat Seedlings
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作者 郭小建 郭春绒 《Agricultural Science & Technology》 CAS 2008年第2期109-111,138,共4页
[ Objective] The study aimed to reveal the effects of hypergravity on salt tolerance of wheat seedlings. [ Method ] The seed germination rate (Gr) and germination index (Gi) of wheat seedlings were measured under ... [ Objective] The study aimed to reveal the effects of hypergravity on salt tolerance of wheat seedlings. [ Method ] The seed germination rate (Gr) and germination index (Gi) of wheat seedlings were measured under hypergravity of 600 × g or 1 000 × g for 4 h and under the stress of 0.4% or 0.9% salt solution. The catalase (CAT) activity and malondialdehyde (MDA) content of wheat seedlings were also measured under 0.4% salt stress. [Result] Compared with seedlings in CK group (no hypergravity or salt stress), the Gr and Gi of the seedlings in salt stress treatment decreased to different extents; while the Gr and Gi of the seedlings in treatment group (hypergravity and salt stress) increased compared with that in salt stress group. CAT in seedlings of hypergravity treatment was higher than that of CK group and 0.4% salt treatment group, meanwhile the MDA showed an opposite result. [ Conclusion] Hypergravity could enhance the salt resistance of wheat in specific range, and hypergravity of 600 × g for 4 h performed better than that of 1 000 ×g for 4 h. 展开更多
关键词 HYPERGRAVITY WHEAT Salt stress MDA CAT
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草莓定植前后几个关键技术
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作者 温庆文 钟霞 +1 位作者 王蕾 高念 《长江蔬菜》 2018年第17期38-39,共2页
导读:草莓定植后容易死棵,为此提出定植后的几个关键环节,包括有机肥使用关、生物菌使用关、健壮苗选择关、幼苗处理关、定制关、管理关、病害预防关等。棚室草莓定植时间大多在8月中下旬到9月中下旬,从我国北部的辽宁、河北到南部江... 导读:草莓定植后容易死棵,为此提出定植后的几个关键环节,包括有机肥使用关、生物菌使用关、健壮苗选择关、幼苗处理关、定制关、管理关、病害预防关等。棚室草莓定植时间大多在8月中下旬到9月中下旬,从我国北部的辽宁、河北到南部江淮地区依次开始定植。但是,定植后草莓死棵现象是个非常棘手的问题,让种植户们苦不堪言。总结了草莓定植前后的几个关键环节,为预防草莓死棵现象,确保成活率提供借鉴与参考。 展开更多
关键词 棚室草莓 定植后 技术 死棵现象 病害预防 壮苗选择 幼苗处理 定植时间
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浅谈玉米育苗移栽技术
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作者 张秀玲 《新农村(黑龙江)》 2017年第5期75-75,11,共2页
玉米作为我国农业种植的主要作物之一,其生产量在全国范围内占有重要比重,在人们日常的主食中也占有举足轻重的作用,为我国国民经济的发展也起到积极的促进作用,在玉米育苗移栽技术方面需要充分开发利用科技手段,增加玉米生产产量... 玉米作为我国农业种植的主要作物之一,其生产量在全国范围内占有重要比重,在人们日常的主食中也占有举足轻重的作用,为我国国民经济的发展也起到积极的促进作用,在玉米育苗移栽技术方面需要充分开发利用科技手段,增加玉米生产产量和玉米育苗栽培技术开发,这无论对于玉米生产大省还是我国整体农业都具有非常重要的意义。本文笔者则主要针对玉米育苗移栽技术进行探讨,为我国玉米育苗栽培技术人员提供借鉴,以供参考。 展开更多
关键词 玉米育苗栽培技术 品种 幼苗处理
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Effects of tip-pruning treatment on source-sink regulation of Catharanthus roseus seedlings 被引量:1
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作者 GAO Yang ZHANG Xue-ke GUO Xiao-rui SUN Yan-fei ZU Yuang-gang 《Journal of Forestry Research》 SCIE CAS CSCD 2006年第4期326-328,共3页
Fifty cultivated Catharanthus roseus seedlings were selected for tip-pruning treatment and the effects of tip-pruning on seedling growth and source-sink regulation were investigated for revealing physiological mechani... Fifty cultivated Catharanthus roseus seedlings were selected for tip-pruning treatment and the effects of tip-pruning on seedling growth and source-sink regulation were investigated for revealing physiological mechanisms of plants. The results showed that tip-pruning treatment resulted in obvious inhibition of apical dominance and enhancement of branching numbers. The contents of soluble sugars, acid sucrose invertase activity (AI) had a great change in differently positional leaves of the seedling. The sink strength in tip leaves of seedlings dramatically declined after tip-pruning treatment, while that in the leaves at the middle and bottom of seedlings had no obvious changes. The inhibition of apical dominance of tip leaves of seedlings was caused by the diminished sink strength due to tip-pruning treatment, 展开更多
关键词 Catharanthus roseus (L.) G. Don Source-sink regulation Tip-pruning Apical dominance
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Seedling Growth of Cassia tora, Cassia occidentalis and Cassia sophera in Relation to Salinity and pH 被引量:1
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作者 Sabiha Sultana A.K.M. Nazrul Islam 《Journal of Agricultural Science and Technology(A)》 2015年第7期601-607,共7页
The paper aimed to investigate the growth of seedlings of three species of Cassia (C tora, C. sophera and C occidentalis) at different concentrations of salinity (NaC1) and pH treatments. All the species showed th... The paper aimed to investigate the growth of seedlings of three species of Cassia (C tora, C. sophera and C occidentalis) at different concentrations of salinity (NaC1) and pH treatments. All the species showed the highest seedling length under control condition, and with the increase of salinity, C occidentalis showed the highest sensitivity. The seedling length of C tora at 0.05 M NaCI significantly (P = 0.05) decreased to 5.71 cm, and further increase of salinity to 0.1 M, the seedling length was decreased to less than the value of 0.05 M NaC1 treatment and one-third (2.15 cm) of that of control (6.92 cm). Seeds of all the species failed to germinate at 0.5 M NaC1. Scarified seeds of C. sophera and C occidentalis increased seedling length. The highest seedling length was in C. sophera, followed by C. tora and C. occidentalis. All the species showed significant decrease (P 〈 0.05) of fresh weight with the increase of salinity; scarification of seeds in C. occidentalis and C. sophera showed higher fresh weight than those of without scarification. Experiments at different pH levels did not show any significant (P = 0.05) change in seedling length, except C. sophera, while at acidic pH, both seedling length and dry weight were significantly (P 〈 0.05) decreased. 展开更多
关键词 Cassia spp. seedling growth SALINITY pH.
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Effect of Inoculants Mixture on Nutrient Uptake and Growth in Cucumber(Cucumis sativus L. ) Seedlings
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作者 邵双 郭晓雷 《Agricultural Science & Technology》 CAS 2010年第5期66-68,共3页
[Objective]we checked the role of various proportion of three growth promoting bacteria to determine the optimum proportion with greater symbiosis in cucumber seedlings. [Method]Three strains of Rhodopseudomonas palus... [Objective]we checked the role of various proportion of three growth promoting bacteria to determine the optimum proportion with greater symbiosis in cucumber seedlings. [Method]Three strains of Rhodopseudomonas palustrisSH2,Bacillus megateriumSHⅡ3,Bacillus mucilaginosusSH1 were applied in this study. Cucumber were cultured in plastic pot,inoculating mixture with seven different proportion for 28 days. [Result]2:1:2 treatment had the strongest effect on N,P,K uptake and concentrations in the soils,on increasing enrich of Fe and Zn inroots and shoots and on plant height,stem diameter,dry weight,relative chlorophyll contents. Treatments of 1:1:2 and 1:1:1 were following ,while the weakest effect was given by 1:2:2,2:2:1 and 1:2:1 treatments. [Conclusion]2:1:2 is the optimum proportion of the three bacteria for nutrition uptake and growth of cucumber seedlings. 展开更多
关键词 Biofertilizar Nutrient Photosynthesis Strain Symbiosis
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Characterization of Pro-embryogenic Calli and Somatic Embryogenesis of Byrsonima intermedia A. Juss.
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作者 Luciano Coutinho Silva Renato Paiva +4 位作者 Diogo Pedrosa Correa Da Silva Sandro Barbosa Rairys CravoHerrera Lisete Chamma Davide Patricia Duarte De Oliveira Paiva 《Journal of Agricultural Science and Technology(A)》 2012年第8期962-970,共9页
Byrsonima intermedia A. Juss. is a species from the Brazilian Cerrado that produces edible fruits and, in common with other species from the Byrsonima genus, has pharmacological potential. Previous attempts to propaga... Byrsonima intermedia A. Juss. is a species from the Brazilian Cerrado that produces edible fruits and, in common with other species from the Byrsonima genus, has pharmacological potential. Previous attempts to propagate the species through conventional methods showed difficulties. Thus, the purpose of this work was to characterize pro-embryogenic masses of Byrsonima intermedia callus, aiming for their in vitro propagation through somatic embryogenesis. Leaf segments from in vitro germinated seedlings were employed as explants for callus production. The calli were then subcultured and exposed to dyes to fulfill their embryogenic potential. Digitalizations of the cytological preparations were made in order to measure the area that was stained by both Aceto-Carmine and Evans-Blue, using image tool software. Somatic embryos were induced after treatments with l-naphthaleneacetic acid (NAA). The percentages of double-colored areas (by Aceto-Carmine and Evans-Blue) were calculated and the data were analyzed by using the Skott-Knott test (P ≤ 0.05) and, the embryogenic callus, as well as the formation of somatic embryos were analyzed by using the Krsuskal-Wallis rank test (P ≤0.05). The results show that double coloration is effective at identifying cells showing embryogenic potential. Early callus subculture phases show a larger percentage ofembryogenic area (83%) Somatic embryos were induced by using high auxin level. 展开更多
关键词 Double staining aceto-carmine evans-blue somatic embryogenesis native plant auxin.
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Pre-seed Treatment Effects on Avocado (Persea americana L.) Seedlings Health and Growth before Side-Grafting in Ghana
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作者 P. Y. Adjei B. Banful Y. A. Asante 《Journal of Agricultural Science and Technology》 2011年第3期346-351,共6页
Studies were conducted to detennine the effects of hot water (50 ℃) and fungicide (contizeb ‘5') treatments on avocado seeds in terms of seed health, germination and seedling growth before side-grafting. The le... Studies were conducted to detennine the effects of hot water (50 ℃) and fungicide (contizeb ‘5') treatments on avocado seeds in terms of seed health, germination and seedling growth before side-grafting. The leathery coverings or seed coat were removed and either 1 cm or 1.5 cm of the narrow top of the seeds was removed before sowing. There were six treatments arranged in a randomized complete block and rephcated three times. In a six week period after germination when side grafting could be done, it was found out that the earliest germination came from the 'no hot water or fungicide-treated" seeds cut at 1 cm but most seeds germinated from the fungicide-treated seeds at 1 cm cut. Most fungi including Fusarium andAspergillus spp found to either delay germination or reduce seedling vigour were minimized in number through the fungicide treatment compared to the hot water-treated seeds. Seedlings performance in terms of shoot extension and canopy development was significantly better in the fungicide-treated seeds than from either the hot water or the non-treated seeds. The study concluded that avocado seed treatment prior to sowing enhanced germination. 展开更多
关键词 Fungi eradication hot water treatment fungicide treatment GERMINATION contaminants.
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杀虫壮苗的新型杀虫剂 度锐
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作者 孟德超 《新农业》 2010年第1期50-50,共1页
度锐是瑞士先正达作物保护有限公司2009年研发的新产品,同时也是先正达公司全球范围内首个在中国率先上市的产品。度锐改进了以往杀虫剂常规的施用方法,采用淋喷和灌根的方式对作物幼苗处理,对杀虫剂的应用具有重要意义。
关键词 新型杀虫剂 壮苗 作物保护 先正达公司 全球范围 施用方法 幼苗处理 产品
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苗圃化学除草实用技术系列报道之Ⅱ 被引量:4
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作者 陈国海 《林业科技通讯》 北大核心 2001年第3期35-35,共1页
关键词 杉木 苗圃地杂草 化学防除 综合防除 播前处理 幼苗形成期处理 苗木速生期处理 除草剂
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