白杨杂种无性系的抗寒性

Cold Resistance of Hybrid Clone of White Poplar

以９个白杨杂种无性系为材料，测定了相对电导率、钾离子相对渗出率、失水率、水分饱和亏缺，并进行了苗木生长恢复试验，根据各项指标的测定结果对各无性系抗寒性进行了综合评定。结果表明，无性系间抗寒性差异较大，尤其Ｂ４２９，易县毛白杨、Ｂ４３３与其它５个无性系相比抗寒能力较差，各无性系抗寒性由大到小依次是：ＭＸ１＞Ｂ４３２＞Ｂ４３０＞ＭＸ２＞Ｂ４３１＞Ｂ４１４＞Ｂ４２９＞易县毛白杨＞Ｂ４３３。

With 9 hybrid clones of white poplar as the expreimental materials, the relative leakage of electrolytes, relative leakage of K + , and the rate of leaf water losing were studied Growth recover experiment of the clone seedings was also carried out The cold resistance abilities of the clones were comprehensively compared according to the studied indices The results showed that there were obvious differences among the clones of the ability of cold resistance The abilities of cold resistance on the clones from high to low was MX1, B432, B430, MX2, B431, B414, B429, P tomentosa, B433