摘要
研究了我国燥红土的土壤持水性和土壤水分物理性。通过对燥红上水分周年动态观测，分析了燥红土的土壤水分年循环规律，以水量平衡法研究了燥红土在湿润期向干少期转换的土壤水衰退过程。并以土壤有效水贮量为参数计算和分析了燥红土的有效供水与作物（玉米）需水间的耦合关系．指出拔节─抽穗是水分亏缺关键期。提出了抗旱和耕作、砂石等覆盖法，调整作物种植期，适时集中灌溉，罐渗法等节水农作措施。
The paper dealed with the water retention capability of soil and the physical properties of soil water in dry red soils. According to the measurement of the soil water fluctuation,the author analysed the annual soil water cycle rules in dry red soils. By means of soil water balance method,the desorption process of soil water was studied during the period of udic moisture regime to xeric moisture regime. The coupled relationship between the supply of available soil water in dry red soil and demand of plant for water was determined with available soil water as parameter. Meanwhile,the author pointed out that the water deficiency of the plant was decided during the elongation and earsprouting stage. The water-saving practices were proposed,e.g.cultivation gully to fight drought,cultivated lands covered with sands and gravels,regulation stage,appropriate and collective irrigation and infiltration with pots.
出处
《水土保持研究》
CSCD
1996年第3期63-69,共7页
Research of Soil and Water Conservation
基金
国家"八五"攻关项目
关键词
燥红土
土壤水分
节水农业
灌溉
dry red soil
soil water
water-saving agriculture
