热带林的反射率平均占辐射量的17.4％,向大气的有效长波辐射约占13.7％,净辐射约占70％。蒸散值约占年降水量的36—57％,平均为43.6％。水量平衡各分量、土壤CO_2释放量、森林小气候特征都与干湿季节的变化有明显的关系。山地雨林的年凋落物量平均为7.7±1.2t/ha,半落叶季雨林为9.7±2.3t/ha。物质循环的研究表明,热带林的有机物归还量大、分解快,在较少人为干扰下元素的输出较少,多用于系统内的循环利用。 The average reflectance of tropical forest is 17.4% of the radiation, about 13.7% of the effective long-wave radiation to the atmosphere and about 70% of the net radiation. Evapotranspiration value accounts for about 36-57% of annual precipitation, with an average of 43.6%. The components of water balance, soil CO2 emission, and microclimate characteristics of the forest all have obvious relations with the changes of the wet and dry seasons. The annual litterfall in the mountain rainforest averaged 7.7 ± 1.2t / ha and the semi-deciduous monsoon forest was 9.7 ± 2.3t / ha. The study on the material cycle shows that the returns of organic matter in tropical forests are large and the decomposition is fast. The output of elements is less with fewer human interferences and is mostly used for recycling within the system.