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平远县是我省十六个用材林基地县之一,自1966年以来,全县共营造了杉木人工林19.7万亩,其中8—10年生的有11.2万亩,要经营好这些中幼林,合理的抚育间伐已成为林业生产的主要任务之一。为了更好地确定这项工作的有关技术措施,1983年我们在泗水、上举两个乡设立了4个标准地进行间伐试验,并进行了调查和树干解析工作,现将结果简述如下。一、抚育间伐试验的设置(一)杉木林的概况1983年在泗水新生林场和上举符坑林场的杉木人工林分别设立了不同林龄、不同地类的标准地。标准地杉木林分的初植密度是每亩240—250株,造林后进行林粮间作,以耕代抚,林分一般4年生左右郁闭。郁闭
Pingyuan County is one of sixteen timber forest base counties in our province. Since 1966, the county has built a total of 197,000 mu of fir plantation, of which there are 112,000 mu of 8-10 years old. To manage these middle-aged and young forest, Proper tending of thinning has become one of the main tasks of forestry production. In order to better determine the relevant technical measures for this work, in 1983, we set up four standard-scale thinning tests in Surabaya and two towns in the country and carried out surveys and tree trunk interpretation. The results are summarized as follows. I. Setting of Tending Thinning Tests (I) Overview of Chinese fir forest In 1983, the standard stands of different stand ages and different scales were set up in the new plantation of Surabaya and the planted Chinese fir plantation in Fukeng Forest Farm. The initial planting density of standard Chinese fir stands is 240-250 plants per mu. After afforestation, intercropping of forest and grain is carried out. Closed