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香榧幼果早期脱落已成为影响产量的最大障碍 ,究其原因主要是香榧细菌性褐腐病所造成。按照田间设计原则 ,在香榧幼果期间浙江省喷施菌毒清、爱多收、万果宝农药和清水 ,其试验结果表明 :喷施菌毒清保果率为 7.77% ,喷爱多收保果率为 1.75% ,喷万果宝保果率为1.89% ,喷清水保果率为 0。菌毒清是一种高效、低毒、广谱、内吸性无公害的农用杀菌剂 ,可以大幅度提高保果率 ;而爱多收、万果宝是植物生长调节剂类农药 ,对提高植物座果率有帮助 ,但也能推迟榧果成熟 ,导致“摘青”等弊端。同样喷药 ,菌毒清明显优于爱多收、万果宝。 相似文献
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为了探讨不同植物生长调节剂对油茶嫁接容器苗生长发育的影响,找出对油茶幼苗生长发育具有较好效果的植物生长调节剂。采用920赤霉素、复硝酚钾、绿多收、催芽先锋4种植物生长调节剂在油茶容器苗生长期进行试验。结果表明:①抽梢率:920赤霉素对油茶幼苗有抑制作用,复硝酚钾、绿多收、催芽先锋有促进作用;②抽梢长度:以绿多收效果最好,梢长均值为5.42cm,个体最大抽梢长度为12.80cm。总体来说,在选择以上植物生长调节剂中,绿多收对油茶幼苗生长具有良好的促进作用。 相似文献
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使用不同农药对香榧结果的影响 总被引：4，自引：0，他引：4
香榧幼早早期脱落已成为影响产量的最大障碍，究其原因主要是香榧细菌性褐腐病所造成。按照田间设计原则，在香榧幼果期间浙江省喷施菌毒清、爱多收、万果宝农药和清水，其试验结果表明：喷施菌毒清保果率为7．77％，喷爱多收保果率为1．75％，喷万果宝保果率为1．89％，喷清水保果率为0。菌毒清是一种高效、低毒、广谱、内吸性无公害的农用杀菌剂，可以大幅度提高保果率；而爱多收、万果宝是植物生长调节剂类农药，对提高植物座果率有帮助，但也能推迟榧果成熟，导致“摘青”等弊端。同样喷药，菌毒清明显优于爱多收、万果宝。 相似文献
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植物生长调节剂在枣树保花保果上的应用 总被引：1，自引：0，他引：1
近年,植物生长调节剂在枣树保花保果上的应用研究有了较大进展。本文将已见报道的一些试验成果作系统归纳和阐述如下。一、植物生长调节剂的作用原理用植物生长调节剂保花保果,就是通过喷施该类药剂,提高枣树的座果率、减轻生理落果及采前落果。 相似文献
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湖南省森林生态效益评估初探 总被引：1，自引：0，他引：1
简述了湖南省植物资源和生物多样性保护现状,并根据已有资料和研究成果,从水源涵养、水土保持和保肥、净化大气、调节气候、景观与生态旅游以及环境综合效益等方面对湖南森林生态效益进行了初步评估。 相似文献
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为了解叶面肥种类对马尾松(Pinus massonianna)苗期生长质量的影响,对马尾松苗分别喷施质量浓度为1g.L-1的特多收和0.125 g·L-1喷施宝叶面肥,结果表明:2种叶面肥处理3个月后马尾松苗高、地径、根系生长以及苗木质量较清水处理均有所提高,特多收叶面肥处理各生长指标均显著高于清水处理(P＜0.05),特多收叶面肥处理较喷施宝叶面肥处理的苗高、地径、主根长、须根数、总须根长、鲜质量和Ⅰ级苗比例分别增加0.7％、3.1％、17.6％、29.5％、21.4％、1.6％和1.5％,施肥效果优于喷施宝(P＜0.05). 相似文献
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A system of classification of woody perennials based on their root activity patterns 总被引：4，自引：0，他引：4
P. A. Wahid 《Agroforestry Systems》2000,49(2):123-130
A method of classifying woody perennials based on the effective foraging space (EFS) is described. EFS of a plant is defined as the soil space which accounts for 80% or more of root activity. The lateral and vertical dimensions of EFS of a plant can be determined from the study of root activity pattern of the plant employing 32P-soil injection technique. Based on the dimensions of the EFS, the perennial plant species may be grouped into 16 classes ranging from plants with very compact-very shallow active root system (less than 100 cm lateral extension and less than 30 cm deep) to very extensive — very deep root system (more than 300 cm lateral spread and more than 90 cm deep). The soil and genetic factors which can influence root activity pattern of a plant can also alter its EFS. Nevertheless, given the soil type and the variety, the concept of EFS can be very fruitfully applied in several situations such as selection of plant species for a given land use system, spacing of the component species in agroforestry and other mixed production systems, deciding the planting geometry, developing the most efficient method of fertilizer application, choosing the most appropriate crop combinations for stratified exploitation of below-ground resources, etc. Although this classification system is primarily intended for woody perennials, it can be extended to other plant species as well.This revised version was published online in November 2005 with corrections to the Cover Date. 相似文献
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Key message
The success of poplar plantations on forest land was affected by soil preparation, plant type, site, and clone. Mounding in combination with large plant types (rooted plants or long cuttings) of site-adapted clones achieved the highest survival and growth.Context
Poplars (Populus species and hybrids) are fast-growing trees used to make various products. In north European countries, they are mainly grown on agricultural land, but interest in planting poplars on forest land has increased.Aims
Plant damage and mortality problems occur on forest land, probably due to soil conditions and competing vegetation. It is therefore of interest to investigate whether combinations of soil preparation methods and plant materials can improve establishment.Methods
At three sites in southern Sweden, the effects of four soil preparation treatments (no soil preparation, patch scarification, mounding, soil inversion) in combination with three plant types (short cuttings, long cuttings, rooted plants) were studied.Results
Survival and growth were significantly influenced by site, soil preparation method, plant type, and their interactions. Mounding resulted in the best overall performance on all sites. Interactions between site and plant type revealed differences in growth dependent on site conditions, but rooted plants and long cuttings were in general most successful. Patch scarification and short cuttings were associated with lower survival and growth.Conclusion
Soil preparation is needed to support survival and early growth, but the combination of method and plant type must be adapted to site conditions. The choice of clones should also be considered.15.
以薄皮甜瓜“甜抗158”为试材,通过采用国家大宗蔬菜产业技术体系项目引进“国家973”计划项目科研成果植物“益生源”生物制剂在棚室早春茬薄皮甜瓜应用效果试验。结果表明,与T1相比,T2在360μmol/m^2·s、540μmol/m^2·s、1080μmol/m^2·s光合有效辐射下,叶绿素a/b比值分别提高6.18%、4.52%、1.42%,有利于提高植株对弱光的利用能力。在光饱和情况下,光合速率提高13.08%;在单株产量、单果重、可溶性固形物上差异显著,分别提高15.16%、12.5%、15%;在果实农药残留检测中,对70%啶虫脒杀虫剂降解显著,降低农药残留41.64%,对70%百菌清杀菌剂农药降解无差异。应用植物“益生源”生物为棚室薄皮甜瓜生产提供了安全有效、环境友好的配套措施。 相似文献
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能源植物的兴起与发展前景 总被引：18，自引：0，他引：18
伴随着能源危机和能源污染,能源植物应运而生。"能源植物"具有环保性、低成本性、可再生性、安全性和持续稳定性,是绿化世界的组成部分,是解决全球能源危机和环境污染的有效手段,必将给人类利用新能源以及经济社会可持续发展带来新的希望。 相似文献
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我国麻疯树地理种源及分布区考证 总被引：2，自引：0，他引：2
经过详细地调查研究证明,我国滇、川、黔三省的热带和亚热带干热河谷区存在大量麻疯树天然群落和野生种群,并对其进行了植物形态学、生长生物学、群落生态学、种群生态学和分布区学的全面研究和再认识,提供了丰富和确切的观察结果。在上述研究基础上,进一步提出了"雨林型"麻疯树地理种源和"萨王纳型"麻疯树地理种源的新概念,为我国麻疯树产业化种植及分区规划提供了依据。金沙江干热河谷"萨王纳型"麻疯树地理种源的存在和出现展示着该物种在纬度极限和海拔极限条件下的生存能力,充分证明其泛热带分布和广泛分布于热带亚洲、热带非洲和热带大洋洲的事实,为麻疯树植物区系地理学研究提供了佐证。 相似文献
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“黄檗”和“黄栌”均为传统名药;但近现代对其原植物的考订有误。故需详加考辨,并为其正名。经文献考证和实物比对,确认黄檗即芸香科植物Phellodendron chinense Schneid．vat．glabriusculum Schneid．,黄栌即漆树科植物Cotinus coggygria Scop．var．cinerea Engl．。并对这两种植物汉名出典的标注问题进行了探讨。 相似文献
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Chemical plant protection and its perspectives in SSR
A number of 374 chemical preparations for plant protection are licenced in SSR. Yearly more than 5.5 millions ha of tilled land are treated with chemical pesticides. The parts of effective groups in the plant protection measures amount to: herbicides = 62%, fungicides = 16%, biological preparations = 12.7%, insecticides = 9.3%. Chemical control actions injure the structure of agrocoenoses, therefore integrated control measures must be introduced for the purpose of reducing the injuries as far as possible. Solely when the critical number of a pest species is overstepped chemical control should be applied. In SSR 8 species of animal pests are objects of prognosis; 23 animal species as well as a virus disease and 2 mycoses are objects of the warning service. 相似文献