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杉木树干通直、材质优良、生长迅速、是我省的一个主要用材树种。为了配合林业生产,解决杉木林合理抚育间伐问题,1974牢4月,刘们在天柱林场进行了杉木抚育间伐的试验。经1976年和1978年两次复查测定,已初见成效,现将结果整理如下。试验地概况和试验方法一,试验地概况试验地在天柱林场十里冲工区。海拔550米左右,为低山地形,西北坡向,坡度30°～35°。土壤为板岩上发育的轻粘质中层红黄壤。林下植物稀少,主要有蕨类。属中等立地条件。据天柱县气象站十学平均资料,主要气象要素:年平均气温16.2℃、极端最高气温
Fir tree trunk straight, good material, rapid growth, is a major timber species in our province. In order to cooperate with forestry production and solve the problem of reasonable tending and thinning of Chinese fir plantation, in April 1974, Liu conducted a trial of fir tending and thinning in Tianzhu Forest Farm. After two reexaminations measured in 1976 and 1978, has shown initial results, the results are summarized below. Test Overview and Test Methods First, the pilot to test the general situation Tianzhu Forest Farm Shili Chong work area. About 550 meters above sea level, low mountain terrain, northwest slope, slope 30 ° ~ 35 °. Soil is a light-viscous medium-sized red-yellow soil developed on slate. Linxia rare plants, mainly ferns. Is a medium condition. According to Tianzhu County weather station ten school average data, the main meteorological elements: the annual average temperature of 16.2 ℃, extreme maximum temperature