梭梭固沙林水分平衡研究──Ⅱ．白梭梭人工积雪固沙林的水分状况

Studies on the Moisture Balance of Haloxylon ammodendron Sand-break Forest:Ⅱ The Moisture State of Haloxylon persicum Artificial Snow-packed Sand-break Forest

对用人工积雪方法营造的白梭梭人工林和荒漠林进行了土壤水分状况和林木生长状况的研究。结果表明，林地的土壤水分状况和林木生长状况随冬季降水量的增加而渐好。人工林的生长状况虽不如荒漠林，但水分供需平衡，属于生长良好类型，４×４．５ｍ的株行距，５５６株／ｈａ的密度，现盖度达到２９．１％，是流沙完全固定的合理密度。荒漠林的生长良好是靠小密度造成的单株水分营养面积大促成的。在农田边缘的流动沙丘上，应用人工积雪的方法按上述密度营造固沙林，可不用疑虑水分平衡的问题。

This paper studied the soil moisture state and forest growing state of desertforest and Haloxylon persicum artificial forest planted by artificial snow-pack method.The result shows that the soil moisture state and forest growing state of forest land were getting well gradually with the increase of Winter rainfall.The growing state of artificial forest is not as well as that of desert forest, but its moisture is balance between supply and demand,belongs to well-grew type.Planting the sandbreak forest by artificial snow-pack method on the drift dune in the fringe of farmland needn't worry about the moisture balance problem.