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[1]SONG Yaqian,ZHAO Xining,PAN Daili,et al.Effects of Grasses on Runoff and Sediment Reduction and Water Transformation on the Slope Under Simulated Rainfall[J].Research of Soil and Water Conservation,2016,23(05):35-41.

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Effects of Grasses on Runoff and Sediment Reduction and Water Transformation on the Slope Under Simulated Rainfall

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 05 Page number: 35-41 Column: Public date: 2016-10-28

Title:: Effects of Grasses on Runoff and Sediment Reduction and Water Transformation on the Slope Under Simulated Rainfall

Author(s):: SONG Yaqian¹, ZHAO Xining^1,2, PAN Daili³, GAO Xiaodong²; 1. College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: simulated rainfall; grass; growth stages; runoff and sediment trapping; soil water content increment

CLC:: S157.2

DOI:: -

Abstract:: Four kinds of perennial grasses (Dactylis glomerata L., Trifolium repens L., Coronilla varia L., Lotus corniculatus L.) growing in the hilly region of Loess Plateau were studied under the simulated rainfall. The runoff and sediment trapping effects and soil water transformation on sloping lands covered by grasses were detected at various growth periods. It was turned out that in the whole growth stages, the sediment ratio and sediment concentration all followed the order: Dactylis glomerata L. < Trifolium repens L. < Coronilla varia L. < Lotus corniculatus L. < bare land. As the growth duration extended, runoff and sediment reduction, soil water content increment and soil stable infiltration all showed a trend of first increase and then decrease. The slope with Dactylis glomerata L. and Trifolium repens L. reached their best performance in the fruited phase, Coronilla varia L. and Lotus corniculatus L. in the stage of pregnancy reached their best performance, At different growth stages, the slope covered by Dactylis glomerata L. and Trifolium repens L. kept higher runoff and sediment reduction benefits, the soil stability infiltration rate and the average soil water content increment than that covered by Coronilla varia L. and Lotus corniculatus L. especially Dactylis glomerata L.. All treatments obtained greater sediment reduction rate than runoff. The soil and water losses in loess hilly-gully region occur mainly from July to September due to the erosive rainfall events. The dynamics of annual runoff and sediment control in sloping lands covered by Dactylis glomerata L. and Trifolium repens L. matched well with that of soil and water losses, which may lead a better performance of Dactylis glomerata L. and Trifolium repens L. in the practice.

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