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在苏南丘陵地区,用“分层切割法”研究了2—18年生33株杉木地上部分生物量。通过几种生物量估测方法的比较,得到杉木胸高直径与树干、枝条和针叶重量之间相关较紧密,精度较高的经验公式。本文探讨了本地区不同年龄阶段杉木林地上部分生物量现状和分配,以及年净生产量的潜力。在资料分析的基础上得出,本地区杉木林宜以小径材为培育目标,伐期龄以14—15年为合理的结论。
In the hilly area of southern Jiangsu, the aboveground biomass of 33 Chinese fir aged from 2 to 18 years was studied by “stratified cutting method”. Through the comparison of several biomass estimation methods, the empirical formula about the relationship between the diameter of chest height of Chinese fir and the weight of trunk, shoots and needles is obtained. This article explores the present situation and distribution of aboveground biomass of Chinese fir plantations at different ages in this region and the potential of annual net production. Based on the analysis of the data, it is concluded that the Chinese fir plantation in this area should take the small-diameter timber as the breeding target, and the cutting period of 14-15 years is a reasonable conclusion.