水土保持学报2009，Vol.23Issue(5)：26-29,4.
青海湟水河流域不同退耕还林模式水土保持效应
Effect on Soil and Water Conservation from Different Models of Conversion of Farmland to Forest in Huangshui River at Qinghai
摘要
Abstract
Based on field investigation and experimental data, soil and water conservation effect was studied in Huangshui river at Qinghai province. The results showed that the sequence of water and soil holding capacity is 41 a Populus cathayana>41 a Picea crassifolia>natural scrub forest>9 a mixture of Picea crassi folia and Hippophae rhamnoides >9a Hippophae rhamnoides >9 a Picea crassi folia (lower slope) >9 a Picea crassi folia (upper slope) > 4 a mixture of Picea crassi folia and Hippophae rhammnoides > farmland. Cam-pared with farmland soil, after 5 years of conversion of farmland to forest, the index of physical and chemical characters and microbial characteristic in soil, takes on obvious changes, and it is stable infiltration velocity of natural scrub forest>9 a mixture of Picea crassi folia and Hippophae rhamnoides>4 a mixture of Picea crassi folia and Hippophae rhamnoides > farmland. And soil erodible factor, K is determined to 0. 483 in natural scrub forest from 0. 773 in farm. And water holding of little per unit of 41 a Populus cathayana was 2. 6 times than that of 41a Picea crassi folia.关键词
退耕还林/水土保持/径流小区/侵蚀模数/枯落物Key words
conversion of farmland to forest/soil and water conservation/runoff-plots/erosion modulus/forest litters分类
农业科技引用本文复制引用
赵串串,董旭,辛文荣,王湜,杨乔媚..青海湟水河流域不同退耕还林模式水土保持效应[J].水土保持学报,2009,23(5):26-29,4.基金项目
青海省林业局资助项目(横向合作项目) （横向合作项目）
