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本文对广东西江地区不同立地不同龄组杉木人工林地上部分生物量和生产力作了研究,结果表明杉木林分生物量和生产力随立地条件不同而变化,3龄组Ⅰ、Ⅱ和Ⅲ立地地林分地上生物量和生产力分别为132.01、97.27和57.93吨/公顷及7.45、4.70和3.29吨/公顷·年。其中Ⅰ、Ⅱ立地间差异不显著,Ⅱ、Ⅲ立地间差异显著(P=0.05),Ⅰ、Ⅲ立地间差异极显著(P=0.01)。在相同立地条件下(Ⅰ立地)杉木林分生物量随着林龄增加而变化,3龄组分别为1、2龄组的3.44和1.6倍。其中3、1龄组间差异极显著(P=0.01),1、2龄组间差异显著(P=0.05),而2、3龄组间差异不显著。文章还对影响林分生长的栽植密度和环境因子作了讨论。
In this paper, the biomass and productivity of aboveground parts of Cunninghamia lanceolata plantations in different sites and different age groups in Xijiang area of Guangdong were studied. The results showed that the biomass and productivity of Cunninghamia lanceolata stand varied with different site conditions. In the 3rd instar group I, II and III stand- Sub-aboveground biomass and productivity were 132.01, 97.27 and 57.93 tons / ha and 7.45, 4.70 and 3.29 tons / ha · year, respectively. Among them, there was no significant difference between sites Ⅰ and Ⅱ, there was significant difference between sites Ⅱ and Ⅲ (P = 0.05), and there was significant difference between sites Ⅰ and Ⅲ (P = 0.01). Under the same site conditions (Ⅰ site), the biomass of Chinese fir plantations changed with the increase of stand ages, which were 3.44 and 1.6 times of those of the 1st and 4th instar groups, respectively. The difference between the 3 and 1 age groups was significant (P = 0.01). There was a significant difference between the 1 and 2 age groups (P = 0.05), while the difference between the 2 and 3 age groups was not significant. The article also discussed planting density and environmental factors that affect the growth of stand.