CARBON MOVEMENT IN RUNOFF AND EROSION UNDER SIMULATED RAINFALL CONDITIONS

被引:34
|
作者
LOWRANCE, R
WILLIAMS, RG
机构
[1] USDA-ARS, United States
关键词
Erosion - Rain and Rainfall--Simulation - Runoff--Analysis - Sedimentation--Analysis - Soils--Chemistry;
D O I
10.2136/sssaj1988.03615995005200050045x
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Runoff, erosion, and C movement were measured from eight 39.6 m2 plots under simulated rainfall in order to assess C movement from a coastal plain soil. Four soil cover conditions were duplicated on the eight plots. Continuous fallow plots had significantly higher C concentrations in runoff and higher sediment concentrations. Sediment from the four-row peanut plots had the highest C content, 5.83%. Total loads of C and sediment and total runoff were about twice as high from the bare-bedded plots. Approximately 1.0% of the total soil C could be moved annually from the continuous fallow plots with a lower percentage from the other treatments. Runoff as well as sediment and C loads were lowest for simulated rainfall during September when peanut had been inverted and were on the soil surface.
引用
收藏
页码:1445 / 1448
页数:4
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