桉树相思树混交林地土壤微生物特征研究  

Features of soil microorganism in mixed forest of Eucalyptus spp and Acacia confusa

作　　者：张明慧[1] 黄宝灵[1] 程亮 吕成群[1] 李志先[1] 韦立秀[1] 

机构地区：[1]广西大学林学院,南宁530005 [2]广西派阳山林场,广西宁明532500

出　　处：《广西农业科学》2009年第6期681-685,共5页Guangxi Agricultural Sciences

基　　金：广西自然科学基金项目(桂科自0832046)

摘　　要：对广西钦廉林场两组桉树纯林、相思树纯林以及二者混交林地土壤微生物类群和分布规律进行研究,探讨桂南地区桉树相思树混交人工林地土壤肥力及其生态效应。结果表明:钦廉林场人工林地土壤微生物数量主要集中在0～20cm土层中,并且随着土层加深,其数量迅速减少;不同林型土壤微生物总数排序依次为混交林>相思树纯林>桉树纯林;不同林型土壤微生物3大类群数量,以细菌所占比例最大,其次为放线菌、真菌。说明桉树与相思树混交林具有良好的生态优势,研究结果可为当前广西营造相思桉树混交林提供参考。To discuss the soil fertility and ecological effects of artificial mixed forest land of Eucalyptus and Acacia confusa in southern Guangxi, the soil microorganism groups and distribution in two sets of pure and mixed forest of Eucalyptus and Acacia forest of Qinlian Forest Farm in Guangxi were investigated. The results showed that in Qinlian Forest Farm, soil microorganism in artificial forest land were mainly concentrated in 0-20 cm of soil layer and their quantity rapidly decreased with the increase of soil depth. The order of the total number of soil microorganisms in different forest lands was： mixed forest〉 A .confusa forest 〉 Eucalyptus forest. In different forest lands, among three kinds of microorgan- isms including bacteria, actinomyces and fungi, bacteria were the largest proportion of population, followed by fungi and actinomyces. These results indicated that mixed forest of A.confusa and Eucalyptus had good ecological dominance ,and it would provide a reference for creating mixed forest of A.eonfusa and Eucalyptus in Guangxi at present.

关 键 词：桉树 相思树 混交林 土壤微生物区系 分布 生态效应 

分 类 号：S154.36[农业科学—土壤学]