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为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。&&&&&&&&&&&&&&&&&&&& The morphological and anatomical characteristics of rooting in stem cuttings of woody plants were studied both in greenhouse and field conditions during .The norms of dividing types of rooting in stem cuttings were shown. About 143 species belonging to 44 families 91 genera of woody plants were classified. The study was concerned with the anatomy of Ulmus pumila L., Robinia pseudoacacia L., Populus tomentosa Carr., Populus deltoides cv. I-69/55., Ginkgo biloba Linn.and Hibiscus syriacus Linn. &&&&&&&&&&&&本文对树木插条生根的形态特征和解剖特性进行了研究。提出了划分插条生根类型的标准,并对44科91属143种树木插条生根进行了分类。通过对白榆、刺槐、毛白杨、I—69/55杨、银杏、木槿等树种插条生根解剖特性的研究,认为愈伤根是从幼嫩愈伤组织中分化发育形成的,愈伤根的发育过程是:愈伤组织→根原基发端细胞→根原基发端→根原基→愈伤根。愈伤组织与生根有直接关系。&&&&&&&& Feeding inhibition and toxicity of the extracts from the six plants: Melia azedarach Linn., M. toosenelen Sieb. et Zncc., Gleditschia sinensis Lam, Hibiscus syriscus Linn., Albizia julibrissin Durazz., and Sophora alopecuroides Linn. on the caterpillars of Dendrolimaus puctatus Walker were examined by the bioassay. It was found that the extracts of A. julibrissin and H. syriscus did not affect caterpillars' feeding significantly and showed no toxicity to the caterpillars. The alcohol extracts of G. sinensis... &&&&&&&&&&&&通过生物测定检验了合欢、木槿、皂荚、川楝、苦楝和苦豆草六种植物的提取物对马尾松毛虫的抑食作用和毒性。木槿和合欢的提取物对松毛虫取食无显著影响，也不具毒性。皂荚的乙醇提取物对松毛虫有抑食作用，但不具毒性。川楝、苦楝的石油醚提取物及川楝的乙醇提取物在较高浓度下抑制松毛虫的取食并对它们具毒性。苦豆草总生物碱的水溶部分对松毛虫有显著的抑食作用。水溶性生物碱、苦参碱、Ｎ－氧化苦参碱、槐定碱，野靛碱、苦豆碱均对松毛虫有不同程度的抑食作用和毒性。其中，Ｎ－氧化苦参碱和槐定碱表现出较强的抑食作用，槐定碱和苦豆碱对松毛虫表现出较高的毒性。&&&&&&&& Hibiscus hamabo is one of rare and precious tree species in Zhejiang.After investigations. observations on phenology, test on sexual and asexual reproduction, on seedling cultivation and afforestation, at laSt, filial generation was tested The result showed that the domestication experiment was successful. &&&&&&&&&&&&海滨木槿，被列为浙江省珍稀濒危树种之一，在调查研究基绌上，对其进行了物候期观察，有性与无性繁殖试验，育苗造林武验，并最后通过子代测定表明，已达到了驯化成功的要求，这将在园林绿化、防护林树种选择上具有广阔应用前景。&nbsp&&&&&&&&相关查询:
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