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青海湖北土壤水分分布与土壤干层恢复
Authors
祁子云[1]
赵景波[1,2]
邢闪[1]
魏君平[1]
Publication date
30 July 2012
Publisher
Abstract
通过对青海湖北沙柳河镇土壤含水量的测定,研究了该区土壤水分含量和土壤干层恢复等问题。结果表明:青海湖北沙柳河镇土壤含水量随着深度的增加而减少,在年降水量略多于400 mm的条件下,多数土壤干层中的水分得到了恢复,干层消失,少数土壤还有干层存在。在2009年降水增多,到2011年土壤水分恢复深度达到了1.3 m,2011年土壤含水量显著高于2009年。在年降水量为410 mm左右的条件下,土壤干层恢复到1.3 m深度需要的时间为2年左右。该区土壤水分运移缓慢,干层恢复比黄土高原缓慢,恢复的深度较小,这主要是该区土壤冻结期较长等决定的。土壤干层中水分的恢复表明,该区2009年以来草原土壤水分输出量略小于输入量
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Last time updated on 03/02/2019