紫色土丘陵区不同耕作模式土壤抗冲性对比分析  

Comparative Analysis of Soil Erosion Resistance under Different Land Use Patterns in Purple Soil Hilly Region

作　　者：魏阜森[1,2] 刘益军[1] 代数[1] 唐寅[1] 

机构地区：[1]西南大学资源环境学院,重庆400715 [2]湖州南太湖水利水电勘测设计院有限公司

出　　处：《防护林科技》2012年第3期1-5,共5页Protection Forest Science and Technology

摘　　要：基于径流小区定位观测研究,分别研究紫色土丘陵区坡耕地不同耕作模式(横垄、顺垄、混合耕作)和不同土层(0～15 cm、15～30 cm)对土壤径流冲刷过程中径流含沙量及抗冲指数的变化特征的影响,以及影响因素的内在关系。研究结果表明:(1)在整个冲刷过程中,不同土层土壤表面径流泥沙流失量呈递减趋势,最后基本趋于稳定;(2)在整个冲刷过程中,径流泥沙流失量总体表现为0～15 cm土层>15～30 cm土层,这主要与土壤剖面特性有关,而农业耕作和根系的影响占次要地位;(3)在各种耕作模式中,抗冲指数的大小均表现为0～15 cm土层<15～30 cm土层,且后者分别是前者的2～3倍。Based on located observation on runoff plots,effects of tillage patterns（transverse ridge,downslope ridge mixed tillage） different soil layers（0-15 cm 15-30 cm） on variation of sediment yield of runoff soil erosion resistance and the correlations among these factors were examined.Result shows that：（1）sediment yield of surface runoff decrease over the scouring process,and finally approximate a constant;（2） sediment yield runoff in 0-15 cm layer is larger than that in 15-30 cm layer,which is probably related to the different soil properties for different soil layers;（3） for all tillage patterns,the order of the soil erosion resistance is 0-15 cm layer15-30 cm layer,and the latter are 2-3 times as large as the former.

关 键 词：土壤抗冲性 耕作模式 径流含沙量 土层 紫色土 

分 类 号：S714[农业科学—林学]