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据印尼《棉兰农园研究所通报》1977年8卷1期报道,橡胶产量不仅与堵塞指数、排胶初速、乳管数、树围大小和干胶含量有关,而且与排胶指数有关。堵塞指数的产量预测价值最大。主要的产量决定因素(割线长度、乳管数和排胶指数)说明,成龄树的产量有79％的变异。排胶指数与排胶初速、割线长度和乳管数呈正相关,与堵塞指数和排胶限制指数呈负相关。
According to the Indonesian “Medan Garden Research Institute,” reported in 1977, Volume 8, No. 1, rubber production not only with the plugging index, the initial release rate, the number of ducts, the size of the trunk and adhesive content, but also with the row of plastic index. The production of jam index is the most predictive value. The major determinants of yield (secant length, number of tubes, and gum release index) indicate that there is a 79% variation in adult tree production. There was a positive correlation between plasticizer index and initial velocity of gum removal, secant length and the number of laps, and a negative correlation with clogging index and plasticizer restriction index.