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研究森林经营措施对森林群落物种多样性的影响动态是当前森林经营实践面临的急需解决的问题 ,也是建立多样性评价指标体系的基础与关键 .通过对冀北山地次生山杨中龄林不同强度抚育后 1 ,2 ,5a的山杨林群落物种多样性变化的调查研究 ,结果表明 :弱度、中度抚育提高了群落物种多样性 ,强度抚育降低了群落物种多样性 ;传统的抚育方式需要改进 .合理保留非目的树种可提高乔木层的多样性 ,保留林下植被对维持群落的多样性及减少抚育间伐对群落生境的负影响有极其重要的生态学意义
Studying the dynamic influence of forest management measures on the species diversity of forest communities is an urgent problem to be solved in forest management practice and also the foundation and key to establish the index system of diversity assessment.Through the study of different intensities The results showed that the species diversity of Populus euphratica community increased after weakness and moderate rearing, while intensity tending reduced the species diversity of the community; the traditional rearing method needed to be improved Reasonable preservation of non - target tree species can increase the diversity of arbor layer, retain the understory vegetation to maintain community diversity and reduce the impact of tending on the community habitat has an extremely important ecological significance