旱农区主要农作物土壤水分变化初探——以内蒙古武川旱农试验区为例

A Study on Soil Moisture Variation of Main Crops in Arid Farming Regions A Case Study of Experimental Plot in Wuchuan,Inner Mongolia

对内蒙古武川旱农试验区栗钙土耕作带土层水分动态进行研究．旱农区土壤水分在一年内经过春季干旱失墒期、夏季干旱失墒期、秋季蓄水保墒期、冬季缓慢失墒期等４个时期．在０～２００ｃｍ土壤剖面内按其供水性能可分为：０～２０ｃｍ为水分骤变层，２０～５０ｃｍ为浅蓄水层。

The article demonstrates the moisture behavior at differential chestnut soil layers in the experimental dryfarming zone in Wuchuan,Inner Mongolia.The moisture behavior of the dryfarming soil undergoes yearly the moisturedecreasing period in dry spring ,the moisturedecreasing period in dry summer,the waterstoring and moisturereserving period in autumn and the moisturereducing period in winter. By the watersupplying capacity ,the 0￣200 cm soil sectional drawing can be divided into three layers ,i.e.,the moisture quicklychanging layer(020 cm),the shallow waterstoring layer(20￣50 cm) and the deep waterstoring layer(50￣200 cm).