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近几年造林多偏向选择杂交杨,河南钻天榆。不能否认,这些树种在水分条件好的情况下,速生性好,这也是被人们所喜爱的原因之一,但它们不抗旱。如近几年129团营造的554.2公顷片林防沙基干林(主要是以杨榆为主)保存只有358.2公顷,其中生长旺盛的只有54公顷,胡杨林占近10公顷。胡杨定植3、4年即可郁闭,全年灌水2~3次就能成活,4、5次就能快速正常生长,比杨树少灌2~3次水,用水节约30%左右。
In recent years, afforestation and more biased to choose hybrid Yang, Henan drilling sky elm. Can not deny that these species in the water conditions are good, fast-growing, which is one of the reasons people love, but they are not drought-resistant. In recent years, for example, 554.2 hectares of forest base for anti-saprophytic plantation (mainly mainly Yangyu), constructed by the 129th Corps, is only 358.2 hectares, of which only 54 hectares are undergoing vigorous growth and nearly 10 hectares are poplar. Populus euphratica colonization 3-4 years can be closed, the annual irrigation 2 to 3 times to survive, 4,5 times can quickly normal growth, less irrigation than the poplar 2 to 3 times water, water saving about 30%.