论文部分内容阅读
青杨采种脱粒繁殖,种子易丧失发芽力,影响育苗效果。在毛主席革命路线指引下,我局开展三结合科学试验,摸索出青杨自然落种育苗的方法,1.5年生苗,平均高73.8厘米,最高121厘米,平均地径0.64厘米,最粗0.9厘米。每亩产苗4万株以上。实践证明,这种方法简便易行,并提高了种子发芽率。简介如下: 1.选圃地:育苗地选在母树林附近,土
Qingyang seed threshing breeding seed easily lose germination, affecting seedling effect. Under the guidance of Chairman Mao’s revolutionary line, our bureau conducted a scientific experiment combining three scientific experiments to find out the method of natural poplar seedling cultivation. The 1.5-year-old seedling had an average height of 73.8 centimeters and a maximum height of 121 centimeters, an average diameter of 0.64 centimeters and a maximum thickness of 0.9 centimeters . Seedlings per acre 40,000 or more. Practice has proved that this method is simple and easy, and improve the seed germination rate. Brief introduction is as follows: 1. Choose nursery: seedling selection in the vicinity of the mother wood, soil