论文部分内容阅读
涉县是河北省核桃的集中产地,但因多年来缺乏科学管理,平均株产仅16.8斤左右。为了改变这种状况,我们于1972年以来,对涉县偏店公社后寨大队的2,995株放任生长的结果核桃大树进行了调查,发现核桃低产的主要原因是大枝多,小枝少;老弱枝多,新壮枝少;无效枝多,有效枝少;树形紊乱,内膛通风透光不良。针对这些问题,开展了核桃树修剪技术的研究。经过7年来的修剪试验,使这个大队的核桃产量逐年增加:1972年产5.8万斤,
Shexian is the concentrated source of walnut in Hebei Province, but due to the lack of scientific management over the years, the average yield of only about 16.8 kilograms. In order to change this situation, we investigated the results of 2,995 walnut trees, which were allowed to grow after 1972 in the Walled Batang Village of Shenshan commune in Shexian County, and found that the main reasons for the low yield of walnut are the large number of branches and the small twigs. Branches and more, the new Zhuang Zhi less; invalid branches, less effective branches; tree disorder, bore ventilation and poor light. In response to these problems, carry out the study of walnut tree pruning technology. After seven years of pruning test, so that the battalion’s production increased year by year: in 1972 produced 58,000 pounds,