At the same clime, the differences of tannin contents in the bark, sapwood, needle, and branch are similar in different seasons with a peak in January and a peak in September.

 
  • 同一立地条件下,随生长期不同,兴安落叶松树皮、边材、针叶和树枝中单宁质量分数的季节动态模式相似。
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