论文部分内容阅读
许多因素会影响胶树的产量,这些因素大致可分为遗传、割胶、生理和气候四类。四十年来,选育种工作使推荐的橡胶种植材料增产五倍。产量的决定因子之一是乳管列数。其它因素有胶树生势、风害和抗病性等。割胶方面的几个因素有割线斜度、割胶深度和割胶强度。排胶时的乳管堵塞速率是控制胶乳产量的一个重要因素。测定乳管堵塞速率的最简单和最通用的公式是平均排胶初速(以每分钟毫升
Many factors will affect the yield of gum trees, these factors can be broadly divided into genetic, tapping, physiology and climate four categories. Over the past 40 years, selective breeding has increased the recommended rubber planting material fivefold. One of the determinants of production is the number of dairy tubes. Other factors have gum tree potential, wind damage and disease resistance. Several factors in tapping include secant slope, tapping depth and tapping strength. The rate of blockage of the tube during gum removal is an important factor in controlling latex production. The simplest and most common formula for determining the rate of blockage of the mammary duct is the average initial velocity (in milliliters per minute