欧洲黑杨无性系抗旱性综合鉴定研究

以34个引种欧洲黑杨无性系及107杨、陕林3号2个对照无性系为试验材料，在水分胁迫条件下对无性系的生理和生长差异进行分析。建立了抗旱性筛选的指标体系，对无性系抗旱能力进行了综合评价。各无性系在各项指标间存在着显著差异，以净光合速率、单叶面积、苗高、生物量、渗透调节能力和细胞质膜透性6项指标作为无性系抗旱性筛选的综合鉴定指标。采用加权排序方法(TOPSIS法)对无性系抗旱能力进行评价，综合抗旱性较强的无性系包括N9、N15、N19、N89、N91。

Study on Comprehensive Judgement of Drought-resistance of Populus nigra

With 34 Populus nigra clones and 2 control clones (Popular 107,Shanlin NO.3)as the experimental materials, the growth and physiological properties of the clones were analyzed under water stress conditions. Index system on comprehensive judgment of drought resistance ability of the clones was suggested and the drought resistance ability of the clones was judged comprehensively. Significant differences of all the indices studied existed among the clones. The net photosynthesis rate, single leaf area, plant height, biomass, the ability of osmotic adjustment and the permeability of plasma membrane were suggested to be used as comprehensive judgment indices in drought-resistance clones selection. A method of weighted arrangement (TOPSIS) was used to judge the drought resistance of the clones. The clones that had strongest comprehensive drought-resistance abilities included N9,N15,N19,N89,N91.