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采用 4种密度、 3种定干高度处理 ,研究不同密度和株形对 1～ 4年生银杏高、地径、冠幅生长量和单株、单位面积产叶量的影响 .结果表明 :密度与单位面积产叶量呈正相关 ,定植第 4年 ,A4 ( 0 .2 m× 1 .0 m)的单位面积产叶量比 A1( 0 .8m× 1 .0 m)增加 1 88.7%,达 1 80 0 .9×1 5kg· hm-2 ;定干虽能在一定程度上促进分枝 ,但对产叶量的影响逐年减弱 ,研究结果为叶用银杏密度与株形控制提供理论依据 .
The effects of different densities and plant forms on the height, diameter, crown growth and yield per plant of 1 ~ 4 year old ginkgo biloba were studied by using four kinds of density and three fixed-height treatments.The results showed that the relationship between density and The leaf yield per unit area was positively correlated. In the fourth year of planting, the leaf yield per unit area of A4 (0. 2 m × 1 .0 m) increased by 1 88.7% compared with that of A1 (0.8m × 1 .0 m) 80 0 .9 × 15kg · hm-2. Although the stems could promote the branching to a certain degree, the influence on the leaf yield decreased year by year. The results provided the theoretical basis for leaf density control and plant shape control.