摘要
为了探索纳帕海高原湖泊湿地面山不同地类的水土流失规律,采用坡面径流小区观测法,对坡面不同地类的产流与产沙特性进行了研究。结果表明:天然次生林和荒草地有较好的调节径流和减少土壤侵蚀的作用,坡耕地的产流量分别是二者的3.6倍和2.7倍,产沙量分别为二者的13.8倍和6.7倍;云杉人工幼林地的产流产沙量分别比坡耕地减少42.2%和81.2%。不同地类的坡面产沙量均随径流量的增加呈线性增加,且坡耕地显著相关。人工林不宜树种单一,乔灌草结合的空间配置方式是水土保持防护林营造的目标和方向。
In order to study soil erosion and water loss on the slope land around plateau wetland Napa lake,runoff plots were employed,and runoff and sediment production caused by rainfall on different types of slope land were collected.Results showed that natural secondary forest and grass help to protect soil from erosion.The runoff of farmland was 3.6 and 2.7 times,and the soil loss 13.8 and 6.7 times as much as those from natural secondary forest and grass land respectively.Young Picea asperata plantation could decrease runoff and soil loss amounts by 42.2% and 82.1% compared to slope farmland,respectively.Soil loss increase linearly with the runoff amounts on different types of slope land,and a significant correlation was found on slope farmland.When planting shelter forests to prevent soil and water loss,single tree species should be avoided and rational and spatial combination of tree-shrub-grass should be recommended.
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第1期81-85,共5页
Journal of Yunnan Agricultural University:Natural Science
基金
NSFC-云南联合基金项目(U0933601)
云南省科技计划项目(2008CA006)
"973"前期研究专项(2010CB434807)
关键词
纳帕海
土地利用类型
径流产沙
Napa Lake
type of land use
runoff and soil loss.
