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利用开路涡度相关系统和常规气象仪,对高效经营的雷竹林生态系统2011年的显热通量、潜热通量、净辐射、土壤热通量以及气温、地温、降雨量进行了观测,分析该生态系统能量通量的变化,以及各能量分量的分配特征,并计算了波文比及能量闭合.结果表明:雷竹林全年净辐射为2928.92MJ·m-2,潜热通量、显热通量和土壤热通量分别为1384.90、927.54和-28.27MJ·m-2,各能量分量的日变化和月变化基本呈单峰曲线.潜热通量为能量散失主要形式,占净辐射的47.3%,显热通量占31.7%,波文比呈“U”型曲线,在0.285～2.062之间变化,土壤为热源.雷竹林年能量闭合度为0.782,月平均闭合度为0.808.
The open heat vorticity correlation system and the conventional meteorological instrument were used to observe and analyze the sensible heat flux, latent heat flux, net radiation, soil heat flux, temperature, ground temperature and rainfall in 2011 of the Phyllostachys pubescens forest. The change of energy flux of the ecosystem and the distribution characteristics of each energy component, and the Bowen ratio and energy closure were calculated.The results showed that the annual net radiation was 2928.92MJ · m-2, the latent heat flux, Flux and soil heat flux were 1384.90,927.54 and -28.27MJ · m-2 respectively.The diurnal variation and monthly variation of each energy component showed a single peak curve.The latent heat flux was the main form of energy dissipation accounting for 47.3% of the net radiation %, The sensible heat flux accounted for 31.7%, and the Bowen ratio was “U” curve, which varied from 0.285 to 2.062 with the soil as heat source. The annual energy closure rate was 0.782 and the monthly average closure degree was 0.808.