释义 |
1 ?纯林 树种组成 (species composition) 各林层、各树种蓄积量(断面积)所占的比重 纯林(pure stand):由一个树种组成的或混有其他树种但材积分别占不到10%的林分 混交林(mixed stand) :由两个或更多个树种组成,其中每个树种的... 2 ?纯林分 ... 纯系 pure line 纯林分 pure stand 紫硫菌 purple sulfur bacteria ... 3 ?能形成纯植从 ...特征:①在红树林环境中完成生育,即它们只出现于红树林,并不延伸出陆生群落;②在群落结构中起主要作用,能形成纯植从(pure stand);③具有适应环境的特化形态,最显著的是具气体交换功能的气生根、胎萌;④具有泌盐机制,它们能生长在海水中并频繁地泌盐;⑤孤立...
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As compared with the China-fir pure stand, it could improve the woodland, and increase the fertility in... 与杉木纯林相比,黑荆和杉木混交能改良林地,提高土壤肥力。 - 2
As compared with the China-fir pure stand, it could improve the woodland, and increase the fertility in the mi... 与杉木纯林相比,黑荆和杉木混交能改良林地,提高土壤肥力。 - 3
Representative mixed plantations A, B of Cyclocarya paliurua Ilinsk and Chinese fir and pure stand of Chinese fir in Xiqin Experimental Forest Farm were selected, and their biomass was determined. 在西芹林场选择有代表性的青钱柳、杉木混交林A、B两种和杉木纯林,进行生物量测定。
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