在我国西北地区的生态环境建设中,有人主张造林,有人主张种草,也有人建议种植灌木。那么,西北地区到底造林好还是种草好呢?树木高大的枝干、浓密的树叶常常让人们产生错觉,将治理生态环境与种树等同起来,植树造林一直被视为有利无害的长远大计。虽然森林在涵养水源、防止水土流失等方面的作用不容置疑,但是在植树造林的过程中一定要采取科学的方式,选择适宜的地方。不科学的植树不但不会得到水分补充,反而会导致河流、水库 In the ecological environment construction in the northwest of our country, some people advocate afforestation, some people advocate planting grass, some people also suggest planting shrubs. So, in the Northwest region in the end is good or afforestation good grass? Tall branches, dense leaves often make people illusion, the ecological environment and the management of trees equate, afforestation has been seen as beneficial to the long-term plan . Although the role of forests in conserving water sources and preventing soil and water loss can not be questioned, it is imperative to adopt a scientific approach and choose appropriate places in afforestation. Unscientific tree planting not only will not get water supplementation, but will lead to rivers, reservoirs