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十三、关于割胶效率的研究割胶时要控制割胶的水平深度以避免伤树。实际上胶工凭自己的经验掌握到割胶割多深才安全和预计胶树能排多少胶。这并不意味着乳管系统被充分有效地利用了,就一定长度的割线来说,为了达到充分高的采胶效率应该尽量割开最多的乳管列。某一树皮横切面上的乳管总数可估算为nfG,n代表乳管列数目,f代表一个乳管列内乳管的平均密度(乳管数/毫米),G代表茎围。乳管横切面的总面积是nfG(πr~2),r代表乳管半径。
XIII. Research on the efficiency of tapping To control the tapping depth when tapping, to avoid injuring trees. In fact, the plastic worker can grasp the exactitude of the plastic cutting by his own experience and how much the plastic rubber can be expected to be discharged. This does not mean that the milk tube system is used efficiently enough. For a given length of cut, the largest number of milk tube rows should be cut to achieve a sufficiently high extraction efficiency. The total number of tubes on a bark cross-section can be estimated as nfG, n for the number of tubes, f for the average density of tubes in a tube row (number of tubes / mm) and G for the stem circumference. The total cross-sectional area of the duct is nfG (πr ~ 2) and r represents the radius of the duct.