海南岛低海拔小粒种咖啡分枝结果特性及与产量构成关系的研究

（１）海南岛低海拔小粒种咖啡具有明显的顶端优势，一级分枝的结果百分率和果节数极显和显高于二、三级分枝。在研究的４个品种中，一极分枝的干豆产量分别为二、三级分枝的１．６－５．６倍，达到极显和显的水平，是植株主要的结果枝条。（２）一级分枝和高产与其果节数量密切相关，它是经济产量构成因素的决定因素。因此低海拔小粒种咖啡可考虑采用多干整形，以提高其一级分枝的数量，增加植株的果节数，从而达到产。（３

Relations Between Branch Fruitsetting Characteristics and Economie Yield Components of Coffea arabica at Low Altitudes of Hainan IsIand

Coffea arabica L. has significant apical dominance at 10w altitudes of Hainan Island,and the fruitset percentage and number of fruitset nodes of primary branches are significantly or much significantly higher than those of secondary and tertiary branches.The primary branches,the main fruitsetting branches,produce dry coffee bean 1. 6 - 5. 6times as much as those of the secondary and tertiary branches,being of significance or high significance levels in the four varieties of trial.High yield of primary branches is closely related to the number of fruitset nodes and is hence the determinant factor of economic yield components of coffee. Coffea arabica gtowing at 10w altitudes on Hainan Island is suggested to be palmette trained in order to increase the number of primary branches and fruitset nodes of coffee trees for eventual high yield. Excess secondary and tertiary branches affecting the growth of primary branches should be pruned off