一、问题的提出 灌木农田防护林就是用纯灌木树种营造的农田防护林。问题的提出始于1980年,当时,吐鲁番地区的农田防护林建设出现新的情况,造林条件较好的农田已基本实现林网化,但因为农业用水较为紧缺,还有十余万亩灌溉条件很差的农田(浇水次数很少的低产田),半休闲农田(只种夏粮或只种秋粮,有半年不浇水),轮休地及盐碱较重的 First, the issue raised shrubs farmland shelterbelt is to use pure shrubs to create farmland shelterbelt. The problem was raised in 1980, when new construction of farmland shelterbelt occurred in Turpan region and afforestation conditions have been basically realized. However, due to shortage of agricultural water supply, there are more than ten mu of irrigation conditions Poor farmland (low yielding fields with few watering), semi-recreational farmland (only for summer or autumn)