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Allelopathy importance and its application under field conditions are reviewed. Recent achievements in the field of plant protection are mainly considered and presented. Natural chemicals of potential use as pesticides, commercialized natural products of pesticidal properties are included. Reported plants of pest control properties, their targeted agricultural pests, formulations, methods of application and activity under field conditions are presented. Allelopathic plant species and implications on their use in the field, positive and negative impacts on cultivated crop species and agricultural pests are discussed. Some research difficulties and experimental methodology problems are mentioned. Prospects of allelopathy as a future strategy for pest management, development of eco-friendly biopesticides and importance for sustainable agriculture and recent developments in allelopathy research are discussed. 相似文献
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徐启江 《黑龙江农垦师专学报》2000,14(3):82-85
反义寡核苷酸包括反义RNA、反义DNA和Riboxyme。它能特异地拮抗内源或外源基因的表达,这为研究某特定基因功能提供了更为有效的方法,为培育抗病植株、调控次生代谢和农艺性状改良提供了可能途径。特定的化学修饰,可以啬反义寡核苷酸抗病毒和对其他特定基因的表达抑制活性。 相似文献
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阐述了核磁共振技术的基本原理;着重论述了核磁共振波谱在木材热处理、木材乙酰化、酯化、醚化及在木材纤维素、半纤维素和木素等木材改性方面的应用。 相似文献
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木质素改性研究对于造纸业的节能减排具有重要意义。基于CNKI中国期刊全文数据库、中国重要会议论文全文数据库,搜索1998~2009年木质素改性研究的相关论文,运用文献计量学的方法对论文的刊载时间、期刊分布、合作度及合著率、研究机构、改性方法研究情况等方面进行统计分析。分析评价了近10年间木质素改性的研究,为了解和把握该领域研究热点和发展趋势提供依据。 相似文献
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Complex traits are the features whose properties are determined by both genetic and environmental factors. Generally, complex traits include the classical quantitative traits with continuous distribution, the binary or categorical traits with discrete distribution controlled by polygene and other traits that cannot be measured exactly, such as behavior and psychology. Most human complex diseases and most economically important traits in plants and animals belong to the category. Understanding the molecular basis of complex traits plays a vital role in the genetic improvement of plant and animal breeding. In this article, the conception and research background of complex traits were summarized, and the strategies, methods and the great progress that had been made in dissecting genetic basis of complex traits were reviewed. The challenges and possible developments in future researches were also discussed. 相似文献
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植物诱导抗病性研究的现状与展望 总被引:3,自引:0,他引:3
本文综述了国内外植物诱导抗病性研究的成果,重点评述了植物诱导抗病性的特性、诱导因子和诱抗机制等方面的进展状况,并对植物诱导抗病性研究的前景及应用问题阐明了自己的观点。 相似文献
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有机络合物对土壤磷素和金属离子活性影响研究进展 总被引:5,自引:0,他引:5
本综述了有机络合物对土壤磷活化影响的研究状况及其对土壤金属离子活性影响的研究状况。并提出了今后研究方向和重点。有机络合物有促进土壤磷活化,减少磷固定和提高磷利用率的作用。其作用机制包括其能竞争和减少土壤磷的吸附位点,起酸溶解作用。改变胶体电荷,形成磷-金属-有机酸三元复合体等,而有机络合物对金属离子则表现为双重作用,即它们可能降低土壤金属离子的有效性或毒性,也可能增加其有效性,毒性或没有明显影响。这种复杂作用与有机络合物本身的分子量和种类,作物种类,土壤性质等有极大的关系。 相似文献
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[目的]研究改性膨润土对废水中磷吸附的影响。[方法]采用盐酸和煅烧两种方法对鹏润土分别进行酸改性和热改性,研究了不同浓度酸改性及不同温度热改性对膨润土磷吸附的影响,并探讨了热改性膨润土的最佳温度及pH值。[结果]在废水浓度20 mg/L、膨润土投加量2%(重量比)时,对磷的吸附效果随着酸用量的增加而增加,9%盐酸改性后磷去除率由18.14%提高到45.59%;热改性后磷去除率上升为41.17%,最佳热改性温度为500℃,在弱酸及弱碱性条件下有利于500℃热改性膨润土吸附除磷,pH=9时,10 mg/L磷溶液中磷的去除率可达92.77%,磷剩余浓度为0.47 mg/L,达到国家城镇污水处理厂一级A排放标准。[结论]酸改性和热改性均可显著提高膨润土的磷吸附效果。 相似文献