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研究了燕山山地华北落叶松人工林3种林分类型植物群落的生物多样性和生物量。结果表明:1)华北落叶松白桦混交林和华北落叶松山杨混交林植物物种数均高于华北落叶松纯林,3种类型群落优势种有很大差异。2)3种类型群落的α多样性指数均表现为草本层>灌木层>乔木层,2种华北落叶松混交林α多样性指数高于华北落叶松纯林。3)华北落叶松纯林乔木层生物量比例最高,达到99.33%,高于两种混交林;各器官生物量的分配规律为树干>树枝>树根>树皮>树叶,且所占比例有所差异。
The species diversity and biomass of three plantations of Larix principis-rupprechtii plantation in Yanshan Mountains were studied. The results showed that: 1) Species numbers of Larix principis-rupprechtii-Betula platyphylla mixed forest and Larix principis-rupprechtii mixed forest were higher than those of Larix principis-rupprechtii, and the dominant species of the three types of communities differed greatly. 2) The α diversity index of the three types of communities showed as herb layer> shrub layer> tree layer. The α diversity index of two mixed stands of Larix principis-rupprechtii was higher than that of pure stands of Larix principis-rupprechtii. 3) Larix principis-rupprechtii plantation had the highest proportion of tree layer biomass, reaching 99.33%, higher than the two mixed forests; the distribution law of biomass of all organs was trunk> branch> tree> bark> Differences.