黄土沟壑区砂石覆盖下果园土壤剖面水分状况
he Water Content on the Soil Profile of Apple Orchard with Stone Mulching in the Gully Region of the Loess Plateau
以黄土高原沟壑区砂石覆盖苹果园为研究对象，采用中子仪测定土壤水分的方法，对600cm范围内土壤剖面水分含量的时间分异和空间分布状况进行了研究。结果表明，600cm土层范围内，一周年内可划分为冬季增墒期和夏季失墒期两个阶段；土壤剖面水分空间分布随土壤深度的增加呈现波动性变化且稳定性不同, 土壤含水量变化幅度随土层深度增加而变小，据此可将600cm范围内的土壤剖面划分为速变层、相对稳定层、缓变层和稳定层；在年周期的典型时间，土壤水分在不同层次上的分布差异，8月份土壤剖面不同层次含水量差异最大，11月份次之，5月份再次之，1月份土壤不同层次含水量差异最小。综合看来，除土壤表层因砂石覆盖水分增加外，土壤剖面含水量随土壤深度的增加而减少且趋于稳定，水分下渗能力减弱；冬季土壤含水量多且分布均匀，夏季土壤水分减少且主要集中在上层，此时土壤不同层次水分含量差异大。
he study of apple orchard soil water content in the gully region of the Loess Plateau showed that within the 600cm profile, the variation of soil water can be divided into two periods: water increased in winter and water decreased in summer. With the increased of the depth of soil profile the water content reduced and tends to stable. The water content in winter is not only more than that in summer, but also well-distributed in the soil profile. However in summer time the soil water mainly concentrated on the upper layer. Based on the standard deviation and variation coefficient, soil water change in the profile can be divided into four layers: quickly changing layer, relative stable changing layer, slow changing layer and stable changing layer.
郝明德、谢永生、张义
农业科学研究园艺
砂石覆盖果园土壤剖面水分含量
stone mulchingapple orchardsoil profilewater content
郝明德,谢永生,张义.黄土沟壑区砂石覆盖下果园土壤剖面水分状况[EB/OL].(2008-11-25)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/200811-717.点此复制
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