论文部分内容阅读
本文对西北林学院杜仲优树汇集圃内１０个优树无性系的枝条进行了不同低温处理，采用电导法测定了电解质渗出率，探讨了１０个优树无性之间的抗寒性差异，对其抗寒性强弱进行综合评判后依次排序为：略４５＞略１１＞略１６＞湘１１＞略４９＞略１＞略４３＞略４１＞黔８＞灌３。并初步测出１０个杜仲优树无性的半致死温度约在－２２～２４℃之间。
In this paper, the branches of 10 elite clones in the Eucommia ulmoides shrubs were numerically treated at different low temperatures. The electrolyte leakage rate was determined by conductivity method. The differences in cold resistance between 10 elite trees were discussed. The cold resistance of its comprehensive evaluation of the order were as follows: slightly 45> slightly 11> slightly 16> Hunan 11> slightly 49> slightly 1> slightly 43> slightly 41> Guizhou 8> irrigation 3. The preliminary semi-lethal temperature of 10 asexual trees of Eucommia ulmoides was measured between -22 ~ 24 ℃.