ISWC OpenIR  > 水保所知识产出(1956---)
小麦秸秆长度、覆盖量对坡面产流产沙的影响
曾建辉1; 李占斌1,2; 马波1,2; 王杉杉2; 张泽宇1
2020
发表期刊水土保持学报
卷号34期号:4页码:98-111
摘要

为定量研究小麦秸秆覆盖对坡面产沙产流过程及减水减沙效益的影响,采用室内人工模拟降雨试
验,研究在降雨强度为 90mm / h 时,不同秸秆长度和秸秆覆盖量下的坡面产流产沙特征和产流产沙过程
规律,结果表明:( 1 )在相同秸秆长度下,随秸秆覆盖量增加,产流量产沙量极显著减少(
p <0. 01 )。相同覆
盖量水平下随秸秆长度增加,产流量显著增加(
p <0. 05 ),在 4. 5t
/ hm
2 覆盖量下产沙量极显著增加(
p <
0. 01 )。( 2 )秸秆覆盖坡面的初始产流时间较裸露坡面延迟6. 23倍,产流量平均下降19. 5% ,产沙量下降
31. 6% 。覆盖措施通过保护土壤的结构有效抑制了细沟侵蚀过程向切沟侵蚀发展。产流产沙过程受秸秆
长度和覆盖量的交互作用影响,交互效应对产流过程的影响更突出。( 3 )随覆盖量增加,减水减沙效益极
显著增加(
p <0. 01 );随长度增加,减水减沙效益分别减少为 17. 26% , 27. 97% 。不同覆盖条件下的坡面产
流量、产沙量和减水、减沙效益均与秸秆长度、秸秆覆盖量呈二元线性关系。( 4 )在当前试验条件下,当秸
秆长度为 3~5cm ,覆盖量为 4. 5t / hm
2 时达到最优减水减沙效益。

其他摘要

An artificial rainfall simulation experiment was conducted at the intensity of 90 mm / h , under
different straw lengths and different straw coverage to study the characteristics of runoff and sediment
production on the slope and the regularity of runoff and sediment production process.In order to quantify
the
effects of different wheat straw lengths and mulches on the characteristics and process mechanisms of slope
runoff and sediment yield , as well as the benefits of water and sediment reduction efficiency under different
straw conditions.Results showed that :( 1 ) Under the same straw length , with the increase of straw
coverage , the yield and sediment yield decreased significantly ( p <0. 01 ) .At the same coverage level , with
the increase of straw length , the yield increased significantly ( p <0.05 ), and the yield of sand increased
significantly under the coverage of 4.
5t / hm
2 (
p <0. 01 ) . ( 2 ) The initial runoff time of the straw - covered
slope surface was 6. 23times longer than that of the bare slope surface , and the average production flow rate
decreased by 19.5% , the sediment yield decreased by
31.6%.Covering measures effectively
inhibited the
trend of trench erosion to cut trench erosion by protecting the structure of the soil.The process of runoff and
sediment production is affected by the interaction of straw length and mulch.The effect is more prominent on the
process of runoff. ( 3 ) With the increase of coverage , the benefits of water and sediment reduction increased
significantly ( p <0. 01 ); with the increase of length ,
the benefits of water and sediment reduction decreased
to 17. 26%and 27. 97%respectively.The slope runoff yield , sediment yield , water reduction , and sand reduc -
tion benefits under the different covering conditions have a binary
linear relationship with straw length and straw
coverage. ( 4 ) Under the experimental conditions , when the straw length is 3 ~ 5cm , with the amount of4. 5t / hm
2 ,
the optimal water and sediment reduction benefits are achieved.

关键词秸秆长度 秸秆覆盖量 侵蚀量 产流产沙过程 水土保持效益
收录类别中文核心期刊要目总览
语种中文
文献类型期刊论文
条目标识符sbir.nwafu.edu.cn/handle/361005/10139
专题水保所知识产出(1956---)
作者单位1.西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室
2.中国科学院水利部水土保持研究所
推荐引用方式
GB/T 7714
曾建辉,李占斌,马波,等. 小麦秸秆长度、覆盖量对坡面产流产沙的影响[J]. 水土保持学报,2020,34(4):98-111.
APA 曾建辉,李占斌,马波,王杉杉,&张泽宇.(2020).小麦秸秆长度、覆盖量对坡面产流产沙的影响.水土保持学报,34(4),98-111.
MLA 曾建辉,et al."小麦秸秆长度、覆盖量对坡面产流产沙的影响".水土保持学报 34.4(2020):98-111.
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