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已明确证实,未曾割过胶的胶树,其树干的树皮碳水化合物没有梯度,昼夜对树皮碳水化合物也无影响。然而,开始割胶后,从树顶部至剖面,树皮的淀粉逐渐减少,形成梯度。与某一未割区,如反面的未割过胶割面或开割割面上方2米高处相比,割胶会使割面的树皮淀粉普遍亏缺。与对照树比较,树皮淀粉的亏缺程度与割胶强度看来没有线性关系。但是,割面至割面上方2米高处的树皮淀粉含量(％)与割胶强度似乎有更密切的相关。与树皮
It has been unequivocally confirmed that there is no gradient in the bark carpets of tree gums that have not been cut and that have no effect on the bark carbohydrates day and night. However, after tapping started, the starch in the bark gradually decreased from the top of the tree to the cross section, forming a gradient. With a non-cutting area, such as the back of the uncut plastic cut surface or cut the cutting surface above 2 meters above the cut, the cut bark starch generally scarce. Compared to the control tree, there appears to be no linear relationship between the degree of dehiscence of bark starch and tapping strength. However, there seems to be a closer correlation between the starch content (%) and the tapping strength at bark cut 2 m above the cut surface. With bark