绿洲-漠交错带是植被恢复的一个重要区域,而植被恢复的关键又是了解沙丘土壤水分的变化规律。从2003年10月到2004年10月,对甘肃省张掖绿洲-荒漠交错带沙丘土壤水分进行了连续观测,并研究了生态垫在沙漠治理中的应用。结果表明:土壤水分时空动态变化主要受降雨、植被以及地表覆盖等因素的影响,沙丘土壤水分月变化滞后于降水变化。沙丘剖面土壤水分变异系数随土层深度的增加而减小,铺设生态垫减小了沙丘土壤水分的空间变异(CV=4.43%),流动沙丘0~40cm的含水量(0.19%~1.27%)低于固定沙丘(1.61%~
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