沙地毛白杨蓄水抗旱栽培技术

为提高沙地蓄水保墒能力，改善幼树主要根系分布区土壤生态条件，对沙地毛白杨蓄水抗旱栽培技术及其对幼树生长的作用进行了６ａ守位研究。结果表明，在幼树根系分布区内分层掺壤，铺塑料膜双及进行聚水抗旱栽培，可明显增强沙地蓄水保墒能力。形成水，肥的富集区，对幼树成活和保存以及对根系，胸径，树高和材积生长均产生显著的促进作用。

The Cultivation Techniques of Populus tomentosa for Water Storage and Drought Resistance on Sandy Land and Their Improved Effects

Centering on raising the capacity of water storage and drought resistance in sandy land andimproving soil ecological condition in the roots area of young trees, the cultivation techniques of waterstorage and drought resistance and the improved effects on the young tree Populus tomentosa werestudied in permanent plots for 6 years. The result showed that it increased the capacity of water storageand drought resistance obviously and formed a rich area of moisture and fertilizer in sandy land mixingloan or straw by layer or lying plastic film in the distributed range of roots or planting in an assemb-ling water and resisting drought way. It could increase the survival and preservation rates and promotethe growth of young trees obviously in roots. diameter, height and volume. After five years the volume growth of the best treatment of lying plastic film and mixing loan raised by 99. 55% and 63. 1% respec-tively compared with that in contrast. According to the multiple improved effects, 4 kinds of culturingpatterns were selected for water storage and drought resistance with the characteristics of less cost, highbenefit and easy to be used.