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丘陵造杉多数地方始于六十年代中期,早造的林分林龄已达20年,有的已开始主伐,如衡东县于1984年试伐,继而正式列入了主伐。丘陵区人工杉木林的主伐期怎样确定?目前意见不一,有的主张提早主伐,缩短生产周期,搞活经济;有的则主张推迟主伐,增加蓄积,提高效益。为此,1986年我们在进行杉木林主伐的同时,作了此项工作的调查研究。方法与样地在全县规划当年主伐的246块林分中,
Most areas of hills and fir trees began in the mid-1960s. The early age of the stands had reached 20 years of age, and some had started the main cutting. For example, Hengdong County began trial cutting in 1984 and was officially included in the main cut. How are the main cutting periods of Artificial Cunninghamia lanceolata forest in the hilly areas? Different opinions exist at the moment, with some advocating early harvesting, shortening the production cycle and invigorating the economy; while others advocate the postponement of the main logging, the accumulation of reserves and the enhancement of efficiency. For this reason, we carried out the investigation of this work while carrying on the cutting of fir forest in 1986. Methods and plots in the county planning the main cutting of 246 stands,