金沙江干热河谷植被恢复初期的群落特征  

Characteristic Analysis of the Community During Early Stage of the Vegetation Restoration in Jinshajiang Dry-hot Valley

作　　者：刘方炎[1] 李昆[1] 张春华[1] 廖声熙[1] 

机构地区：[1]中国林业科学研究院资源昆虫研究所,国家林业局云南元谋荒漠生态系统定位研究站,云南昆明650224

出　　处：《南京林业大学学报（自然科学版）》2007年第6期129-132,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家"十五"科技攻关项目(2001BA510B0302);云南省"十五"攻关项目(2001NG55);国家林业局重点项目(2003-049-L49)

摘　　要：对金沙江干热河谷上游鹤庆段退耕地人工恢复植被（川楝Melia toosendan）初期的（1～4a）生物量以及林下草本层物种多样性进行了比较研究。结果表明，川楝对干热河谷环境有较强的适应性，早期生长良好、郁闭度高、积累的生物量大。但不同坡向之间存在较大的差异：南坡上的单株以及各器官的生物量干重均较北坡高；南、北坡上川楝的单株、干、枝、根生物量分别为（25．246±0．586）kg、（14．986±0．203）kg、（4．634±0．212）kg、（5．626±0．223）kg和（16．580±0．206）kg、（8．544±0．087）kg、（2．895±0．067）kg、（5．141±0．074）kg。在单株及各器官含水率方面，南、北坡上川楝人工林除了根部有极显著差异（p〈0．01），其他部分差异均不显著。林下物种多样性的比较研究表明，川楝林的种植改善了退耕地中植被的生长环境，林下植被多样性及丰富度均得到了较大程度的提高。A comparative study on biomass and understorey species diversity during early stage （1 -4a） of artificial vegetation （Melia toosendan） in the abandoned lands of Jinshajiang dry-hot valley of Heqing County was reported. The results showed that M. toosendan adapted itself to the environment of dry-hot valley well, grew and shaded well in the early stage. At the same time, it had a large biomass. However, it was very different in the dry weight of biomass of the individual and organs of 4- year old M. toosendan plantation between the south slope and the north slope in dry hot valley. The biomass was higher on south slope than that on north slope. The biomass of individuals, trunks, branches, roots on south slope were （25. 246±0. 586）,（14. 986± 0. 203）,（4. 634 ± 0. 212）, （5. 626 ± 0. 223） kg respectively. Those on north slope were （16. 580 ± 0. 206）, （8. 544±0. 087）,（2.895±0.067）,（5.141±0.074）kg respectively. On the other hand, there were no obvious differences in moisture content of individuals and organs except for the roots in 4 year old M. toosendan plan tation between the south slope and the north slope. The study of understorey species diversity showed that M. toosendan improved the growth environment of the abandoned lands, and increased its plant diversity and species richness.

关 键 词：金沙江干热河谷 退耕地 川楝 生物量 物种多样性 

分 类 号：S718[农业科学—林学]