黄土台塬土壤持水特性及其变化规律研究

Soil Retention Ability and Variation Regularity in Loess Platform Lands

对陕西乾县枣子沟流域土壤持水性能、动态变化过程和特点,进行了连续5年(1986～1990)定位观测研究。结果表明,黄土台塬土壤优良的持水特性,是黄土旱塬优势生态条件和有较大增产潜力的原因之一。水分周年变化可分为2个阶段,3个时期,水分垂直分布可分为3个水分层类型。

Fixed osition experiments on soil retention ability, dynamic changing course and soil-water behaviors were conducted for 5 years (from 1986 to 1990)in Za-ozi Gou watershed in Qianxian County. The results showed that the fine retention ability of soil in loessal platform land is one of superior ecological conditions as well as one of the foundamental cause of the great potential of yield increase. The annual vairation in soil moisture can be divided into two stages and four periods as well as water vertical distribution in three moisture layer types.