武夷山毛竹天然林生物量与能量分配规律及其与人工林的比较研究

Study on biomass and energy distribution of natural Phyllostachys heterocycla cv. Pubescens in Wuyi Mountains and its comparison with high-yield forest

以武夷山国家自然保护区核心区天然毛竹林为研究对象,应用生物量优化模型对天然毛竹林生物量、能量的分配规律进行研究,结果表明:①毛竹天然林生物量按组分秆、枝、叶、竹蔸、鞭根的分配规律为5585.956、1120.456、387.453、1148.785、2827.099g·m^(-2),所占比例依次为50.46％、10.12％、3.50％、10.38％、25.54％,能量现存量按组分分别为112171.60、21694.0、7532.8、21796.8、52089.3kJ·m^(-2),所占比例依次为51.70％、10.00％、3.47％、10.05％、24.78％;②毛竹天然林生物量按龄级Ⅰ度、Ⅱ度、Ⅲ度、Ⅳ度、Ⅴ度及以上竹的分配规律为2151.845、1799.441、1184.757、1010.021、4923.684g·m^(-2),所占比例依次为19.44％、16.26％、10.70％、9.12％、44.48％。能量现存量按龄级分别为47465.97、40232.99、26502.84、17737.74、102488.8kJ·m^(-2),所占比例依次为20.25％、17.16％、11.30％、7.57％、43.72％。在此基础上,将毛竹天然林与人工林进行了比较分析。且为毛竹林的丰产培育提出了科学依据。

Based on the data obtained from the natural Phyllostachys heterocycla cv. Pubescens in Wuyi Mountains in Fujian Province,the biomass and energy distribution of the natural Phyllostachys heterocycla cv. Pubescens were studied by the biomass optimum models in this paper. The results showed that the biomass and energy stock of stem, twig,foliage, bamboo stump, rhizome were 55 585. 956,1120. 456, 387.453,1148.785,2 827. 099 g·m-2and 112 171.60,21 694.0,7 532. 8,21 796.8,52 089. 3 kJ· m-2,and their proportion were 50. 46%,10. 12%,3. 50%,10. 38%,25. 54% and 51. 70%,10. 00%,3. 47%,10. 05%, 24. 78% respectively; the biomass and energy stock of Ⅰ degree, Ⅱ degree,Ⅲ degree, Ⅳ degree, Ⅴ degree and above were 2 151.845,1 799.441,1 184.757,1 010.021,4 923. 684 g·m-2 and 47 465.97,40 232.99, 26 502.84,17 737.74,102 488. 8 kJ· m-2,and their proportion were 19. 44%,16. 26%,10. 70%,9. 12%, 44. 48% and 20. 25%,17. 16%, 11. 30%,7. 57%,43. 72% respectively. In addition,the comparison between natural and high-yield Phyllostachys heterocycla cv. Pubescens were further studied. Therefore,the paper provided a scientific basic for the management and development of Phyllostachys heterocycla cv. Pubescens.