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生物多样性研究已经成为生态学研究的热点,而维持物种多样性是目前森林经营研究的一个主要内容。本文运用点抽样方法研究了甘肃小陇山5种不同的灌木林地改造模式的树种多样性。结果表明:带状割灌改造模式林分的树种较全面清理割灌模式丰富,Shannon-Wiener指数与Margalef指数较高,林分的树种多样性较高,林分内各树种分配较为均匀,带状割灌改造更有利于提高林分的树种多样性;在3种全面清理割灌改造模式中,改造日本落叶松模式虽然树种数与其它2种相同,但林分内树种分配均匀性差,集中性高。不同的改造模式对林分树种多样性的影响不同,这对提高和保持改造林分的物种多样性具有一定借鉴意义。
Biodiversity research has become a hot spot in ecology research, and maintaining species diversity is a major part of forest management research. In this paper, we use point sampling method to study the tree species diversity of five different shrub-woodland rebuilding patterns in Xiaolongshan, Gansu Province. The results showed that the tree species of strip cutting irrigation improved the model of cutting and irrigation more comprehensively, the Shannon-Wiener index and Margalef index were higher, the species diversity of stands was higher, the distribution of each species was more uniform, Shape and cutting irrigation is more conducive to improve the diversity of tree species in the forest; in the three kinds of comprehensive clean-cutting and transformation model, the transformation of Japanese larch pattern although the tree species and the other two species are the same, but poor distribution of species in the forest, focus High sex. Different rehabilitative modes have different impacts on species diversity of forest stands, which is of some reference to improve and maintain the species diversity of rehabilitated stands.