需水量差别大的树种配置在一起，最好进行地形处理。
The tree were arranged together, and the terrain was treated if the distinguish of needed water was bigger.
结果表明：4龄榆树与林带间荒草地耗水量差异不显著；
The results showed that the water consumption between 4 years old elms and forst had no obviously difference.
土壤相对含水量80% Q时，各施氮处理叶片相对含水量差异不大。
Leaf relative water content of nitrogen fertilizer treatments had no distinct difference, when soil relative water content was 80%q.
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