亚热带山地突脉青冈群落能量的研究

THE ENERGY OF CYCLOBALANOPSIS ELEVATICOSTATA COMMUNITY IN SUBTROPICAL ZONE

摘要:

对突脉青冈（Cyclobalanopsis elevaticostata）群落植物体各组分的热值、群落能量现存量、能量年净固定量和太阳能转化效率的研究结果表明：该群落植物体各组分样品的干重热值具有一定差异，树皮热值最高，细根热值最低。突脉青同群落的能量现存量852 358 kJ m^-2，其中地上部分741 416 kJ m^-2，占总量的87.01％；地下部分110 642 kJ m^-2，占12.99％。突脉青冈1996年群落能量净固定量为28 273 kJ m^-2，林地太阳光有效辐射能转化效率1.35％。

Abstract:

Based on the measurement of biomass and the rate of its increase, caloric value ofrespective plant organs, energy of standing crop, annual net energy fixation and energyconversion efficiency in Cyclobalanopsis elevaticostata community in subtropical zone at950 m altitude in Fujian Province were determined in 1996. The results showed that thecaloric value of the bark was the highest and the microroot being the lowest among dryweight of plant organs in the community. Total energy of standing crop in the community was 852 058 kJ m^-2, of which the aboveground part comprising 87.O1％, and the underground part 12.99％. Yearly net energy fixation was 28 273 kJ mkJ m^-2， and energy conversion efficiency was 1.35％ for the community．