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我国目前杉木人工林面积逐年增加,抚育间伐的起始期、强度、间隔期等问题亟待解决,为此我们引用日本的理论,结合我国杉木实际生长情况,编制了杉木林分密度管理图,并经过检验,证明精度可达90％以上。在1980年5月于南昌召开的全国杉木第二次科研协作会上,由各地代表组成的鉴定小组对该图的编制进行了鉴定,认为该图达到了国内较高的水平,对我国杉木经营数表的研制和定量间伐等科学栽培制度的建立将有良好的促进作用,建议在生产中进行试用。现将编制该图的理论、方法和精度检验情况报告如下。
At present, the area of Chinese fir plantation is increasing year by year. The initial period, intensity and interval period of tending and thinning need to be solved urgently. Therefore, we cite the theory of Japan and combined with the actual growth of Chinese fir, Test to prove that the accuracy of up to 90%. In May 1980 held in Nanchang, the second national scientific research collaboration fir, appraisal team composed of representatives from all over the map compilation of the identification, that the figure reached a higher level of domestic, China fir business The development of digital meters and the establishment of scientific cultivation systems such as quantitative thinning will have a good promotion effect and are proposed to be tried out in production. Now the compilation of the theory, methods and precision test situation report as follows.