Effects of Plowing Practices on Blown-Sand Movement Near Field Surface of Farmland

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更新时间：2024-11-07

- Effects of Plowing Practices on Blown-Sand Movement Near Field Surface of Farmland
- Vol. 21, Issue 2, Pages: 1-4(2007)
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  CLC： S157.1
- Published：2007
- 稿件说明：
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LIU Mu-xing, LIU Lian-you, ZHANG Xiao-xiao, et al. Effects of Plowing Practices on Blown-Sand Movement Near Field Surface of Farmland[J]. 2007, 21(2): 1-4.
DOI：

LIU Mu-xing, LIU Lian-you, ZHANG Xiao-xiao, et al. Effects of Plowing Practices on Blown-Sand Movement Near Field Surface of Farmland[J]. 2007, 21(2): 1-4. DOI：

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0~60 cm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0~60 cm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(Q0-10/Q0-60)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。

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