The annual total respiration output and its monthly variance of a 17-year-old clone RRIM 600 stand (LAI= 5.6) were estimated by means of mathematical models.

• 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。