烯效唑提高草坪草耐阴性研究.doc

烯效唑提高草坪草耐阴性研究
作 者
陈祖维
指引教师
吴进东
摘要：高大建筑物、乔木及灌木遮阴会使用于都市绿化草坪受到严重胁迫，导致草坪衰退，实验针对这一难题进行了研究。以耐阴性不同常用冷季型高羊茅草坪和暖季型结缕草草坪为实验材料，研究不同浓度外源激素烯效唑解决对2种遮阴草坪草生理及生长变化调控作用。在不同遮阴限度光照下，经烯效唑解决，2种草坪草叶片叶绿素含量增高，植株株高变矮，叶片变宽、变厚，分蘖增长，不同耐阴性草坪草耐阴能力均得到明显提高，最适解决浓度范畴100-200 mg/L。
核心词：草坪草，耐阴性，烯效唑
Study on Shade Tolerance of Turf Sprayed Uniconazole
Author Chen Zuwei
Instructor Wu Jindong
Abstract：The city green turf grasses are under seriously stress for the shading of tall buildings，trees and shrubs，and lead to the recession of turf grass，so the author studied for this problem. Taking the common cold-season tall fescue and warm-season zoysia japonica as test material. Effects of different concentrations of uniconazole on shade-tolerance of two turf grass under shading situation were studied by testing long-term growth and physiological characteristics of them. After treated with uniconazole，the contents of chlorophyll increased，plant height decreased
leaves width and thickness increased，tiller number increased. All of these indicated that uniconazole can evidently improve shade-tolerance of three turf grasses with different shade-tolerance；the optimal concentration of uniconazole is from 100 to 200 mg/L.
Key word：turf grass，shade tolerance，uniconazole
都市绿化是乔灌草、乔灌、乔草或灌草相结合有机体，但高大乔木或灌木往往给草坪草带来不可避免遮阴胁迫，再加上迅速增长高大建筑物环境，更使草坪草受到严重遮阴胁迫。光是植物生长发育必不可少因子，由于得不到充分阳光，无法获得足够能量以抵抗诸如践踏、病害、高温等逆境胁迫，草坪草易发生黄化和