前言油棕的作物生长率(单位面积的干物质增长率),随着叶面积指数(单位面积的叶面积)增至最高水平而提高到每年每公顷约40吨。油棕的单株净同化率和干物质产量随着叶面积指数增加而下降,但单株营养组织干重却不受种植密度的影响。因此,达到产油量高的最适叶面积指数,大大低于达到最大作物生长率的临界叶面积指数。 Foreword The crop growth rate (dry matter growth rate per unit area) of oil palm increased to about 40 tonnes per hectare per annum as the leaf area index (leaf area per unit area) increased to its highest level. The net plant assimilation rate and dry matter yield of oil palm decreased with the increase of leaf area index, but the dry weight of vegetative tissue per plant was not influenced by the planting density. As a result, the optimum leaf area index for high oil production is reached, much lower than the critical leaf area index for maximum crop growth.