梭梭固沙林水分平衡研究──Ⅲ．梭梭柴径流集水固沙林的水分状况

Studies on the Moisture Balance of Haloxylon ammodendron Sand-break Forest:Ⅲ The Moisture State of Haloxylon ammodendron Runoff Catchment Sand-break Forest

对利用人工坡降和自然坡降两种径流集水方法营造的梭梭固沙林，进行了土壤水分状况和林木生长状况的研究。结果表明，两种集水方法所形成的径流量、均占林地水分平衡收入项的８９％，也是支出项蒸散量的主要基础，现１４．７％和４．９％的盖度过小，再加大盖度也不会出现供不应求的水分失衡现象。指出径流集水营造固沙林是天山北麓生态、经济两效俱佳的成功措施，但在实施前，应选择好下伏沙土的平坦地，确保径流集水的渗润效应。

This paper studied the soil moisture state and forest growing state of Haloxylon ammodendron sand-break forests planted by artificial and natural runoff catchment methods.The result shows that the runoff formed by two catchment methods made up the 89% of forest soil moisture.It indicated that planting sand-break forest by runoff catchment method is successful measurement for ecology and economy in the northern slope of Tianshan Mountain.