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我国许多地方早年就开始了农田防护林建设。近年来,一些农田防护林巳接近成材甚至过熟老化,需要及时更新。目前农田防护林更新方法多采取先采伐后栽新林的方式。这样做有许多弊端:新栽的林带不能立即见效,一般至少要三年以后才能成林。此前农田失去了保护,影响了整体防护效益。为了克服这一不良后果,哲里木盟国营胜利农
Many parts of our country started the construction of farmland shelterbelt in early years. In recent years, some farmland shelterbelts have become mature or even over aged and need to be updated in time. Currently, the method of renewing farmland shelterbelts adopts the method of planting new forests after cutting first. There are many drawbacks to doing this: Newly planted forest belts can not be immediately effective, and forests should generally be completed after at least three years. Prior to the loss of farmland protection, affecting the overall protection effectiveness. In order to overcome this negative consequence, Jeremuh League is a state-owned victors