[1]陈洪松,郝明德,宋孝玉.黄土高原沟壑区农田土壤水分动态变化分析[J].水土保持研究,2003,10(01):92-94.
　CHEN Hong-song,HAO Ming-de,SONG Xiao-yu.Dynamic Change of Farmland Soil Water in the Loess Tableland Gully Region[J].Research of Soil and Water Conservation,2003,10(01):92-94.
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黄土高原沟壑区农田土壤水分动态变化分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 10 期数: 2003年01期 页码: 92-94 栏目: 出版日期: 1900-01-01
Title:
Dynamic Change of Farmland Soil Water in the Loess Tableland Gully Region
作者:
陈洪松1, 郝明德1, 宋孝玉2
1. 中国科学院水利部水土保持研究所, 陕西杨陵 712100;
2. 西北农林科技大学水利与建筑工程学院, 陕西杨陵 712100
Author(s):
CHEN Hong-song1, HAO Ming-de1, SONG Xiao-yu2
1. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi China;
2. College of Water Conservation and Architectural Engineering, Northwestern Sci-tech University of Agriculture and Forestry, Yangling 712100, Shaanxi, China
关键词:
黄土高原沟壑区; 农田; 土壤水分; 动态变化
Keywords:
the Loess tableland gully region; farmland; soil water; dynamic change
分类号:
S152.7
摘要:
以黄土高原沟壑区径流小区为研究对象，分析了雨季、旱季缓坡农田土壤水分动态变化以及坡位对农田土壤水分动态变化的影响，结果表明：雨季、旱季农田土壤水分动态变化趋势相同，但浅层（10～30cm）土壤水分变化幅度较大，尤其是降雨产流时；土壤水分的补偿和恢复主要取决于雨强适中、历时长且雨量大的降雨过程，与土壤前期水分剖面特征、作物覆盖度以及作物耗水特性密切相关，而坡度几乎没有影响；坡位对农田土壤水分动态变化也有一定的影响，观测期末雨季、旱季土壤蓄水增量为坡上<坡中<坡下，坡的中下部土壤储水量也较坡上部大。
Abstract:
Based on the field data of runoff plots in the Loess tableland gully region, the dynamic change of farmland soil water was analyzed during rainy and dry time respectively, and the effects of slope position on soil water change were discussed.The results showed that the dynamic changes of soil water in every layer were similar, but the shallower the depth was, the bigger the change trend of soil water was, especially after runoff took place.The compensation and resumption of soil water was primarily dependent on the precipitation with reasonable intensity and long time, and had a close relation with the previous soil water profile, crop cover ratio and water consumption characteristic, but the effect of slope gradient could be omitted.The slope position had a small effect on the dynamic change of soil water, and the increase of soil water for 10~50 cm layer during rainy time and 10~60 cm layer during dry time was in the order of topmiddlefoot.In addition, the stored water in the middle and lower parts was larger than that in the upper part of the farmland.

参考文献/References:

[1] 李玉山, 苏陕民.长武王东沟高效生态经济系统综合研究[M].北京:科学技术出版社, 1991.
[2] 沈冰, 王文焰. 降雨条件下黄土坡地表层土壤水分运动[A] 见: 沈晋等.动力水文实验研究[M] 西安: 陕西科学技术出版社, 1991.177-189.
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备注/Memo

收稿日期:2002-11-25
基金项目:国家科技攻关（2001BA508B18）
作者简介:陈洪松（1973- ），男，湖北通山人，在读博士生，主要从事土壤物理和水土保持方面的研究工作。

更新日期/Last Update: 1900-01-01