德宏州西南桦人工林的生物多样性分析

生物多样性的保持是人工林发展过程中一个倍受关注的焦点问题，本研究选择德宏州的西南桦人工林作为研究对象，在样地调查的基础上，统计分析西南桦人工林的生物多样性状况。结果表明，调查的10块典型样地中，植物种类44－124种。西南桦人工林的群落结构包括单层纯林、单优多层多种林、混交林和林农作物间作等不同类别，并在人工林内记录到部分国家级和省级保护植物种类。通过与德宏州铜壁关自然保护区的天然西南桦林和同处云南热区的西双版纳普文试验林场西南桦人工林相对比，表明德宏州营建的西南桦人工林显现出较好的生物多样性恢复能力。

Analysis on biodiversity of Betula alnoides plantations in Dehong prefecture

The Betula alnoides plantations in Dehong Prefecture were selected to analyse the biodiversity based on sampling plot investigation since maintaining biodiversity was a focused issue in the plantations. The results showed that there were 44-124 plant species in 10 investigated sampling plots. The population structures of B. alnoides plantations presented different types of monolayer pure forest, single dominant and multi layer and species of forest, mixed forest, agroforest, and so on. There were national and provincial protecting plant species in the plantations. It was indicated that there had preferable capacity of biodiversity rehabilitation of B. alnoides plantation in Dehong Prefecture compared the biodiversity to which of B. alnoides natural forests in Tongbiguan Natural Reserve of Dehong and the plantation in Puwen experiment foresty centre of Xishuangbanna located in tropical area.