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模拟降雨下草被坡面水沙调控效应及水分转化研究
宋亚倩1; 赵西宁1,2; 潘岱立3; 高晓东2
2016
Source Publication水土保持研究
Volume23Issue:5Pages:35-41
Abstract

以黄土丘陵区四种多年生牧草(鸡脚草、白三叶、小冠花、百脉根)为研究对象,采用人工模拟降雨试验方法,定
量研究不同草被措施不同生长阶段(5月上旬、6月上旬、7月中旬和8月下旬)的坡面水沙调控效应及土壤水分转化
特征。结果表明:在整个生长周期内,四种草被措施坡面产沙率和含沙量均表现为鸡脚草坡面<白三叶坡面<小冠
花坡面<百脉根坡面<裸地坡面。随着生长时间延长,四种草被措施坡面减流效益、减沙效益、土壤稳定入渗速率和
土壤平均含水量增量均呈现先增大后减小的趋势。其中,鸡脚草坡面和白三叶坡面在结实期达到最大,小冠花坡面
和百脉根坡面在孕蕾期达到最大。在不同生长阶段,鸡脚草坡面和白三叶坡面减流效益、减沙效益、土壤稳定入渗速
率和土壤平均含水量增量均大于小冠花坡面和百脉根坡面,其中以鸡脚草坡面最为显著。四种草被措施在不同生长
阶段坡面减沙效益都远大于减流效益。黄土丘陵区坡面水土流失主要来自7—9月份频率较高的降雨所产生的坡面
径流,鸡脚草和白三叶生长旺盛期与水土流失频发阶段吻合,使其调控坡面水沙能力得以充分体现。

Other 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.

Keyword模拟降雨 草被措施 生长阶段 水沙调控 土壤含水量增量
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8751
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水利与建筑工程学院
2.中国科学院水利部水土保持研究所
3.西北农林科技大学水土保持研究所
Recommended Citation
GB/T 7714
宋亚倩,赵西宁,潘岱立,等. 模拟降雨下草被坡面水沙调控效应及水分转化研究[J]. 水土保持研究,2016,23(5):35-41.
APA 宋亚倩,赵西宁,潘岱立,&高晓东.(2016).模拟降雨下草被坡面水沙调控效应及水分转化研究.水土保持研究,23(5),35-41.
MLA 宋亚倩,et al."模拟降雨下草被坡面水沙调控效应及水分转化研究".水土保持研究 23.5(2016):35-41.
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