河北雾灵山不同林分灌草多样性及影响因素研究

Study on shrub-grass diversity and influerce factors of different forests in Wuling Mountain of Hebei Province

试验研究了河北雾灵山5种人工纯林（油松、蒙古栎、核桃楸、华北落叶松和白桦）的灌草多样性及其生物多样性与影响因子的关系。结果表明：5种林分中的灌木和草本的Menhinick丰富度指数分别为0．41～0．76，0．77～2．12；Simpson多样性指数分别为0．41～O．78，0．64～0．97；Shannon-Wiener多样性指数分别为0．87～2．13，0．99～2．71；均匀度指数分别为0．49～1．10，0．51～1．00。物种多样性受外界环境因子的影响较大，随海拔升高灌木多样性减小，草本多样性指数先增大后减小；随坡度增大灌木和草本多样性增大；随林龄增大草本多样性减小}随郁闭度增大灌木多样性减小。

This paper studied the shrub and herbaceous plant diversity and species diversities＇ influence factors of five different artificial pure forests （Pinus tabulaeformis, Quecus momgolica, Juglans mandshurica , Larix principic-rupprechti , Betula platyphylla ） in Wuling Moun- tain, Hebei province. The results showed that： shrubs and herbal＇s Menhinick richness index was 0.41-0.76 and 0.77-2.12, respectively;their Simpson diversity index values was 0.41-0.78 and 0.64-0.97, respectively; their Shannon-wiener diversity index were 0.87-2.13 and 0. 99-2. 71, respectively; their evenness index was 0.49-1. 10 and 0.51-1. 00, respectively. Species diversity was affected by environment greatly. Shrub diversity index decreased with the altitude increasing, the herb diversity index increased first and then decreases; with increasing slope shrub and herb diversity index increased; With increasing age of the herb diversity index decreased; and with canopy density increasing shrub diversity index decreased.