LIAO Xiao-yong,CHEN Zhi-jian,LIU Shao-quan,et al.Study on Soil Losses in Different Land Use Types of Purple Slope Cropland in the Three Gorges Reservoir Area[J].Research of Soil and Water Conservation,2005,12(01):159-161.
三峡库区紫色土坡耕地不同利用方式的水土流失特征
- Title:
- Study on Soil Losses in Different Land Use Types of Purple Slope Cropland in the Three Gorges Reservoir Area
- 分类号:
- S157.1
- 摘要:
- 紫色土坡耕地水土流失已成为三峡库区生态环境和农业可持续性发展所面临的一个重大问题。研究通过15°、25°坡耕地不同利用方式的定位试验，探讨了三峡库区紫色土坡耕地的水土流失状况、侵蚀泥沙的颗粒组成及养分特征。结果表明紫色土坡耕地流失的泥沙中<0.02mm的颗粒大量富集，是养分流失的主要载体。不同土地利用方式中以果—植物篱复合、粮经果复合垄作模式的水土保持效果理想。
- Abstract:
- Soil losses of purple slope cropland are serious problems on both eco-environment and sustainable agricultural development in the Three Gorges Reservoir area. Soil losses of five kinds of land use types were studied through observing soil erosion, analysing nutrient losses and particle compositions of the eroded soil. The results showed that planthedge-rows, agro-forestry and contour tillage were the most suitable land use types in conserving soil and water. The sediments of eroded soil richly gathered <0.02 mm particles which were the main carriers of nutrient losses.
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备注/Memo
收稿日期:2004-4-22。
基金项目:中科院知识创新工程项目（KZCX2-316）；国务院三建委办公室资助项目（SX2001-021）
作者简介:廖晓勇（1971- ），男，四川自贡人，副研究员，硕士，主要从事土壤学、农业生态学研究.