生态环境学报Issue(9)：1550-1555,6.
滇西北高原生态恢复过程中土壤侵蚀特征及其影响因子
Soil erosion dynamics and its influencing factors in eco-restoration of plateau region in northwest of Yunnan province, China
摘要
Abstract
The degraded ecosystem is accentuated by soil erosion in a cold-temperate climate on limestone regions in the upper stream of the Yangtze River. A discussion of the tendency towards soil erosion and its influencing factors during restoration is to provide a basis for vegetation reconstruction in the studied area, which is located at Napahai in northwest Yunnan, southwest China. The effect of slope lands, wild grass, secondary forests and mixed forests on surface runoff and sediment yield was studied by using spatial series instead of the temporal sequences. Results showed that loss of water and soil was obviously reduced in both the secondary forest and the mixed forest. Compared with the slope land, the amount of soil loss of both the secondary forest and the mixed forest decreased by 51.46%and 43.18%, and that of water loss by 39.39%and 24.24%, respectively. The amount of soil loss from maximum 24-h rainfall in the wild grass, slope land, secondary forest and mixed forest respectively made up 55.38%, 55.58%, 58.35%and 58.05%of total soil erosion, and that of water runoff did up 64.72%, 64.63%, 73.85%and 55.39%of total water loss for July-September during the two continuous rainy season. Furthermore, the amount of soil and water loss was significantly and positively correlated with soil organic matter content, and negatively correlated with indexes of plant diversity and homogeneities of plant communities in both a tree and a bush layer (P<0.05), respectively. Consequently, the combination of basic plant types (tree/shrub/grass) should be recommended in plantation forests to prevent soil and water loss in northwest Yunnan, China.关键词
滇西北/土壤侵蚀/生态恢复/植物多样性/土壤理化性质Key words
northwest of Yunnan/soil erosion/eco-restoration/plant diversity/soil physical and chemical properties分类
农业科技引用本文复制引用
王利民,卜晓莉,罗涛,黄东风,陈奇伯..滇西北高原生态恢复过程中土壤侵蚀特征及其影响因子[J].生态环境学报,2013,(9):1550-1555,6.基金项目
国家科技支撑计划项目(2012BAD14B15-6)；福建省农业科学院博士科研启动基金(2010BS-7)；福建省自然科学基金(2011J05057)；福建省属公益类基本科研专项(2011R1101012-2) （2012BAD14B15-6）
