黔中地区一、二代马尾松人工林土壤微生物数量及生物活性研究  

Study on Soil Microorganism Quantity and Biochemical Activity of First-and Second-Generation of Pinus massoniana Plantations in Qianzhong

作　　者：蔡琼[1] 丁贵杰[1] 

机构地区：[1]贵州大学造林生态研究所,贵州贵阳550025

出　　处：《林业科学研究》2013年第2期247-251,共5页Forest Research

基　　金：国家863项目(2011AA10020301);国家"十二五"科技支撑课题<马尾松速生丰产林定向培育关键技术研究与示范>;贵州省特助人才计划(TZJF-2007年20号);贵州省重大专项(黔科合重大专项字[2012]6001号;省人才基地建设项目(黔人领发[2009]9号);省创新团队建设项目(黔科合人才团队(2011)4003)课题联合资助

摘　　要：由于人工林面积的不断扩大和人类经营措施的不合理，致使世界范围内人工林地力衰退现象十分严重。我国主要造林树种杉木（Cunninghamia Lan—ceolata（Lamb．）Hook）、落叶松（karix spp．）、桉树（Eucalyptus spp．）等存在地力衰退现象，其中田大伦、杨玉盛、叶绍明等分别对杉木、桉树连栽进行了较深入研究，得出连栽林地土壤理化性质、林下植物、枯落物生物量及养分循环等有下降趋势。The quantity of different microorganisms, biochemical activity and the enzyme activity of the first-and second-generation of Pinus massonicma under similar condition were studied by using the methods of microorganism cultivation and laboratory analysis on soil microorganism biochemical activity and enzyme activity. The results showed that all the indexes of the soil microorganism quantity, biochemical activity and the change of soil enzyme activity （except Nitrification） in the first-and second-generation stands of P. massoniana showed the vertical distri-bution characteristics. The indexes decreased with the increase of soil depth, which reached significantly different. All the indexes of the second-generation P. massoniana about the soil microorganism quantity, biomass, biochemical activity and the change of soil enzyme activity were higher than those of first-generation. There was a significant pos-itive correlation between bacterial amount and biomass carbon, and between bacterial amount and respiration. There was a very significant or significant positive correlation between the quantity of actinomyce, fungus and biomass car-bon, respiration, invertase and catalase.

关 键 词：马尾松 微生物 生化活性 酶活性 

分 类 号：S791.248[农业科学—林木遗传育种]