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本文在生物生产力研究的基础之上,通过热值测定,对东北东部帽儿山地区21年生人工落叶松(Larix gmelinii)生态系统净初级生产力形成过程中的能量特征做了系统研究。结果表明:(1)植物热值随植物种类、器官、分布层次、年龄及季节而发生变化。(2)生态系统中活植物体的能量现存量为269.719×10~(10)J/ha,而枯死体中的能量现有量为36.817×10~(10)J/ha,其中凋落物层和立枯体中能量贮量各占84.04％和15.6％。(3)生态系统能量净固定量为264.346×10~9J/ha·yr,其中29.49％的能量存留在植物体中,用于植物净生长。生态系统年能量归还量为88.809×10~9J/ha,其中32.39％的能量在当年被分解释放,余下能量积累于凋落物层之中;生态系统的能量转化效率为2.299％,与其它森林植物群落相比,落叶松人工林系统是高效率的能量代谢系统。
Based on the study of biological productivity, this paper systematically studies the energy characteristics of Larix gmelinii ecosystem during the formation of net primary productivity in Maoershan, northeastern Northeast, China. The results showed that: (1) The plant caloric value changed with plant species, organs, distribution level, age and season. (2) The existing energy of living plants in ecosystem is 269.719 × 10 ~ (10) J / ha, while the amount of energy in dead bodies is 36.817 × 10 ~ (10) J / ha. The litter layer And vertical body energy reserves accounted for 84.04% and 15.6%. (3) The net fixed energy of ecosystem is 264.346 × 10 ~ 9J / ha · yr, of which 29.49% of the energy remains in the plant for the net growth of the plant. The annual energy return of ecosystems was 88.809 × 10 ~ 9J / ha, of which 32.39% of the energy was decomposed and released in the current year and the remaining energy accumulated in the litter layer. The energy conversion efficiency of the ecosystem was 2.299%. Compared with other forest plants Compared with the community, larch plantation system is an efficient energy metabolism system.