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我们从河南引进鄢陵白榆(Ulmus pumila)进行造林,时间不长,体会不深,仅将初步实践报告如下:一、平原地区,单纯栽杨,不够科学。我县在荒山造林有了眉目的基础上,在地区林业局的帮助下制定了从一九七五年起主攻四旁和林网的规划。杨树,生长迅速,繁殖容易,适应性强,确定为四旁植树和方田林网的主栽树种。一九七五年春季,县、公社都搞了四旁植树和方田林网的试点。一九七六年全面铺开,一春绿化千里路。但是,七六年和七七年的夏季,都出现了杨树风折现象。仅柏家沟公社十八公里长的公路树,就折断六百二十棵,平均每三十米就风折一棵树。折树的外因是风大,内因是虫害。吸取这一教训,需要加强杨树病虫害的防治工作,也需要在树种选择上,下点功夫。一九七七年秋农林部李世光处长等同志,到我县检查工作,指
We introduced the Yanling elm (Ulmus pumila) from Henan Province for afforestation, which took a short time and did not come to an end. We only reported the preliminary practice as follows: First, the plains simply planted Yang were not scientific enough. Based on the foresight of afforestation in the barren hills, with the help of the regional forestry bureau, our county has made a plan for the main four-way afforestation network since 1975. Poplar, rapid growth, breeding easy, adaptable, identified as planting trees on all sides and Fang Tianlin network of the main tree species. In the spring of 1975, counties and communes all conducted pilot projects of tree planting and square Tianlin Network. Fully opened in 1976, a spring green Lane. However, in the seventy-six years and the seventy-seven years of summer, there was a phenomenon of poplar devastation. Only Baijiagou commune eighteen kilometers of highway trees, break 620, an average of every 30 meters on the wind off a tree. The tree is the wind outside the wind, the internal cause is pests. Draw lessons from this need to strengthen the prevention and control of poplar pests and diseases, but also need to select the tree species, the next point of effort. In the autumn of 1977, Li Shiguang, director of the Department of Agriculture and Forestry comrades, went to my county inspection work, referring to