黄土高原坡耕地土壤水分主要受控因子研究
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Effects of Primary Factors on Soil Moisture in Cultivated Slopeland
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    摘要:

    通过对0°~25°坡耕地240cm以上土层1a内各层土壤水分状况每周的观测,结合同期降水资源,研究土壤水分在5-9月份的变化情况,从而得出土壤含水量随坡度增大呈减少趋势;距分水岭30m处土壤含水量最高(9%坡度); 土壤水分含量随雨量增大而增大;中等雨强降雨对土壤水分影响最大;高茬覆盖有利于增加土壤含水量,5-9月份, 土壤月平均含水量呈正弦曲线变化的规律。

    Abstract:

    By measuring soil moisture within various layers (above 240cm deepth) in the cultivated slopeland with 0°~25°during one year , a monthly change in soil moisture from May to September was discussed considering rainfall information. The results indicated that soil moisture decreased as gradient increased. The highest soil moisture occurred at a place where is 30m far away from the ridge line. Soil moistur eincreased with increasing rainfall.The effect of a moderate rainfall intensity on soil moisture was significant.Soil moisture was increased by high residue mulch. The change of monthly mean soil moisture from May to September was nearly a sinecurve.

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赵晓光,吴发启,刘秉正,刘世海.黄土高原坡耕地土壤水分主要受控因子研究[J].水土保持通报,1999,(1):10-14,32

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  • 收稿日期:1998-10-15
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  • 在线发布日期: 2014-11-28
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