Study on the community structures and erosion control ability of different plantations in Xiaojiang drainage basin, China
Xiaojiang drainage basin is one of the regions suffering from serious erosion and ecological degeneration due to the climate, geological and geomorphological conditions and the heavy human activities. Reforestation, which has been done since 1980s in the region, is an effective measure for the ecological restoration. Four types of plantations, i.e., Eucalyptus spp., Acacia mearnsii, Leucaena leucocephala and Pinus yunnanensis are investigated in the sample plots. Development processes and community structures of the tree layers, shrub layers and grass layers are studied with the ergodic hypothesis method and the index of species richness, coverage, importance value and Shannon Wiener index et al, and erosion control abilities of the four types of plantations are compared in this paper. The result shows that the plantations of Acacia mearnsii and Leucaena leucocephala grow faster, and have higher crown coverages and stronger erosion control abilities than that of the plantations of Pinus yunnanensis and Eucalyptus spp.do.The Pinus yunnanensis plantation has a higher secondary understory biodiversity, and Eucalyptus spp. plantation has a high secondary understory biodiversity, but the plantations of Acacia mearnsii and Leucaena leucocephala have low secondary understory biodiversities. Study in this paper shows that the four types of plantation have distinct effects in promoting plant diversity and have different erosion control abilities. So plantation species selection and association mode should be considered in the process of reforestation for ecological restoration.
plantation community structure plant diversity erosion control ability
YANG Jj-Shan WANG Zhao-Yin YU Guo-An ZHANG Kang LIU Huai-Xiang
Yellow River Institute of Hydraulic Research,YRCC,Zhengzhou 450003, China;Department of Hydraulic an Department of Hydraulic and Hydropower Engineering, Tsinghua University , Beijing 100084 , China
国际会议
西安
英文
356-360
2010-10-11(万方平台首次上网日期,不代表论文的发表时间)