乳管的产胶能力主要取决于对乳管的糖的供应。而这种供应受到多种因子的影响,其中最主要的是受光合活动和韧皮部中糖的运转的影响。常规割胶时割去了韧皮部组织,因而严重地削弱了糖的运转。树皮消耗越多,其影响就越大。这些观察结果引起了人们对不伤害输导系统采胶技术的研究:在用乙烯利处理的垂 Dairy production capacity depends mainly on the milk supply of sugar tube. And this supply is affected by many factors, the most important of which are affected by the photosynthetic activity and sugar in the phloem operation. Conventional tapping removes the phloem tissue, severely impairing the functioning of the sugar. The more bark it consumes, the greater its impact. These observations have led to people not hurt the guidance system of plastic mining technology research: ethephon