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应用有关的数学模型估算了一树龄为17龄、叶面积指数为5.6的RRIM600无性系胶树林分的年呼吸总量及其变异。结果表明:呼吸量在一年中的变异为单峰曲线型,以1、2月份最低,8月份达最高值;昼夜呼吸量的差异因月份不同而异,除11—2月夜间稍大于白天外,其余月份都是白天大于夜间;从全年看,地上部分的白天呼吸量约比夜间大13％左右。在年平均气温为24.06℃的1981年中,该胶树林分因呼吸而消耗掉的干物质为2435.3公斤/亩·年(其中叶占68.84％;根占16.34％;茎和枝占14.82％),相当于年总光合产量3913.7公斤的62.23％。当然,这一比值在不同粗度植株中是育差异的,给出了距芽接位1.5米处茎围与这一比值的回归方程式。
The total annual respiration and its variation of RRIM600 clone in a 17-year-old, leaf-area index 5.6 plantation were estimated using mathematical models. The results showed that: the variation of respiration in one year was unimodal curve, the lowest in January and February and the highest in August; the difference in daytime and nighttime respiration varied with the month, except that the nighttime in November-February was slightly larger than the daytime In addition, the rest of the month was larger than the daytime during the day. From the whole year, the daytime respiration of the aboveground part was about 13% larger than during the night. In 1981, with annual average temperature of 24.06 ℃, the dry matter consumed by respiration due to respiration was 2435.3 kg / mu · year (of which 68.84% of the leaves were stems, 16.34% of the roots and 14.82% of the stems and branches), equivalent to In the annual total photosynthetic output of 3913.7 kg of 62.23%. Of course, this ratio is different in different roughness plants, gives the 1.5 m from the sprouting position stem circumference and the ratio of the regression equation.