宁夏引黄灌区现有各种林网树木1.3亿多株,按照设计要求,目前,部分林网树木已经陆续成材,进入采伐更新阶段。如何合理的采伐利用,并适时更新,是整个灌区林网即将面临的一个问题。自1986年开始,我们在青铜峡市大坝乡进行了农田林网树木平茬更新试验,经过2年多的试验观察,其效果十分显著。 There are more than 130 million trees of various forest nets in irrigated areas of Yellow River in Ningxia. According to the design requirements, at present, some trees of forest nets have gradually become timber and have entered the stage of cutting and regeneration. How to harvest and utilize it rationally and update it in time is a problem that the entire network of irrigation area will face soon. Since 1986, we have carried out the stubble renewal experiment of farmland forest net in Dam Township, Qingtongxia City. After more than two years of experiment observation, the effect is very significant.