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黑杨派的几个无性系具有生长期长、生长快、抗性强、材质好的优良性状。现已大面积试验推广。但是,美州黑杨无性系对低温敏感,在辽宁、山西等地冻害比较严重。江苏的徐淮地区,冬春遇持续的干旱低温,苗木的枯梢现象亦较普遍,影响造林成活率。因此,鉴定这些无性系的抗寒力,选择其适生的范围,是引种试验中的一个十分重要的问题。本文报道了黑杨派无性系抗寒力测定的试验结果。
Some black climber clones have a long growth period, fast growth, strong resistance, good material quality traits. Now a large area test promotion. However, Populus clone Poplar Clivia sensitive to low temperature, Liaoning, Shanxi and other places more serious frost damage. In Xuhuai of Jiangsu Province, the dry and cold temperatures in winter and spring, the phenomenon of the shoots of seedlings are also more common, which affects the survival rate of afforestation. Therefore, to identify the cold resistance of these clones and to choose their suitable range is a very important issue in the introduction test. In this paper, we report the test results of determination of the cold resistance of Clonal clones.