干旱区生态环境知识资源中心(Arid): 农田耕作措施对近地表风沙运动的影响

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	农田耕作措施对近地表风沙运动的影响
其他题名	Effects of Plowing Practices on Blown-Sand Movement Near Field Surface of Farmland
	刘目兴; 刘连友; 张小啸; 孙炳彦; 彭茹燕
ISSN	1009-2242
出版年	2007
卷号	21 期号:2 页码:1-4
中文摘要	我国北方传统耕作模式的犁耕、耙磨及磨平整地措施对农田近地表风沙活动影响显著。通过对春季半干旱沙区农田风沙活动的观测，本文对犁耕、耙磨磨平两种处理下近地表0～60cm内输沙率和风沙流结构随田块长度的变化规律进行了研究。结果表明，耙磨磨平处理破坏了犁耕在农田地表形成的非可蚀性土块结构，使近地表0～60cm内输沙率增大，在强沙尘事件中增加幅度可达数10倍。犁耕地表上输沙率随田块长度的增加呈指数关系递增，而耙磨磨平后风沙流发育的饱和路径长度减小，在强沙尘事件中近地表输沙率随田块长度的增加而递减。此外，上风向处犁耕地表低层输沙比例（Q_（0-10）／Q_（0-60））小于耙磨磨平地表，且随田块长度的增加逐渐增大，而耙磨磨平后风沙流结构随田块长度的变化不大。
英文摘要	Through field observation of blown-sand movement at semi-arid sandy region in spring,it studied the change of sand transport rate and blown-sand structure at the height of 0～60 cm with increasing field length on field surface after moldboard plowing,harrowing and milling respectively.The results indicated that the practice of harrowing and milling destroyed non-erodible clods formed by previous moldboard plowing practice,which increased sand transport rate in 0～60 cm,and the increment may reach several tenfold.On field surface after moldboard plowing,sand transport rate increased by an exponential function with increasing field length,while after the practices of harrowing and milling it decreased with increasing field length during strong dust storm.Compared with moldboard plowing,the practice of harrowing and milling decreased the critical field length for saturation of blown-sand,and increased the proportion of sand transported in 0～10 cm(Q_(0-10)/Q_(0-60)) at the boundary of windward.Moreover,Q_(0-10)/Q_(0-60)increased with increasing field length on field surface after moldboard plowing,while it changed little on field surface after harrowing and milling.
中文关键词	土壤风蚀 ; 输沙率 ; 风沙流结构 ; 田块长度 ; 传统耕作
英文关键词	wind erosion sand transport rate blown-sand structure field length conventional tillage
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:2858534
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221451
作者单位	北京师范大学防沙治沙教育部工程研究中心北京师范大学资源学院, 北京师范大学环境演变与自然灾害教育部量点实验室, 北京 100875, 中国
推荐引用方式 GB/T 7714	刘目兴,刘连友,张小啸,等. 农田耕作措施对近地表风沙运动的影响[J]. 北京师范大学,2007,21(2):1-4.
APA	刘目兴,刘连友,张小啸,孙炳彦,&彭茹燕.(2007).农田耕作措施对近地表风沙运动的影响.,21(2),1-4.
MLA	刘目兴,et al."农田耕作措施对近地表风沙运动的影响".21.2(2007):1-4.