ZHANG Yi,XIE Yong-sheng,HAO Ming-de.Water Content on the Soil Profile in Apple Orchard with Stone Mulch in the Highland Region of the Loess Plateau[J].Research of Soil and Water Conservation,2009,16(04):156-159,164.
黄土沟壑区砂石覆盖果园土壤剖面水分分布
- Title:
- Water Content on the Soil Profile in Apple Orchard with Stone Mulch in the Highland Region of the Loess Plateau
- Keywords:
- stone mulch; apple orchard; soil profile; water content
- 分类号:
- S152.7;S606
- 摘要:
- 以黄土高原沟壑区砂石覆盖苹果园为研究对象，对600 cm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：600 cm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600 cm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；土壤水分在不同层次上的分布差异，8月土壤剖面不同层次含水量差异最大，11月次之，5月再次之，1月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。
- Abstract:
- The study on soil water content in apple orchard in the highland region of the Loess Plateau showed that within the 600 cm profile, the variation of soil water could be divided into two periods which were water increased in winter and decreased in summer. With the increase of the depth of soil profile, the water content reduced and tended to be stable. The water content in winter was not only more than that in summer, but also well distributed in the soil profile. However, in summer season the soil water mainly concentrated on the upper layer. Based on the standard deviation and variation coefficient, soil water change in the profile could be divided into four layers: quickly changing layer, relative stable changing layer, slow changing layer and less changing layer.
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备注/Memo
收稿日期:2008-12-09。
基金项目:国家科技支撑计划（2006BAD15B01-03）；中国科学院农业项目（KSCX2-yw-N-46-04）
作者简介:张义（1984-），男，硕士研究生，从事土壤环境与果园生态环境调控研究。E-mail：zhangyi.zy@msn.com
通讯作者:谢永生（1960-），男，研究员，从事土壤资源环境方面研究。E-mail：ysxie@ms.iswc.ac.cn