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。
By measuring soil moisture within various layers (above 240 cm 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 30 m far away from the ridge line. Soil moisture increased 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 sine curve.
出处
《水土保持通报》
CSCD
北大核心
1999年第1期10-14,32,共6页
Bulletin of Soil and Water Conservation
关键词
土壤水分
坡耕地
受控因子
soil moisture
cultivated slopeland
factors
