华北落叶松林下植被水平结构研究

Study on the horizontal structure of understory vegetation of Larix principis-rupprechtii plantation

采取种群空间分布格局进行研究与分析,运用扩散系数,丛生指数,扩散指数,聚块性指数,Cassie R.M.指数等聚集度指标对塞罕坝大唤起林场华北落叶松林下植被的水平空间结构进行分析研究,发现多数草本在华北落叶松林下呈聚集分布,极少种类如景天三七、柳兰、柳叶沙参和狭叶荨麻等呈随机分布。结果表明,该地区华北落叶松林生物群落稳定,林下草本生物多样性高。

Spatial distribution pattern of the horizontal structure of understory vegetation of Larix principis - rupprechtii plantation in Saihanba Mechanized Tree Farm of Hebei was studied. The results show that the spatial pattern of the most of the herb beneath Larix principis - rupprechtii plantation presents aggregated distribution, while random distribution only exists in a few species （ such as Sedum aizoon L., Chamaenerion angustifolium, Radix adenophorae, Urtica angustifolia Fisch.）. Based on these results, we believe that the biotic community of Larix principis - rupprechtii plantation in this region is relatively stable, and the biodiversity of understory vegetation is high.