The rate of cork and cortical layer thickness in annual branch could be a morphological structure index of cold resistance. 2. There was much difference of the cold resistance of walnut germplasms in leafing date by conductivity method.

  • 皮层与木栓层在茎结构中所占比率可作为核桃休眠期枝条抗寒性鉴定的形态结构指标。2.电导法研究表明展叶期不同核桃种质间抗寒性差异较大,但种间抗寒性差异较小。

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