葉片數對香蕉蕉株發育、果實產量與品質之影響

Effects of Leaf Number of Banana Tree on Plant Growth, Yield and Quality of Fruit

利用割葉處理以了解葉片數對香蕉株高、莖周、果把數、果指數、果串重量、維青壽命（green life）、櫥架壽命以及醣度之影響。蕉株在全生育期保持不同葉片數時，抽穗時的株高、莖周、果把數、果指數與果串重隨著葉片減少而減少；葉片數保持5枚以上時，株高興莖周不受影響，7枚以上時，果把數與果指數不受影響，而9枚以上時，則蕉果產量不受影響。抽穗前蕉株保持13枚葉片以上時，抽穗時再行割葉處理，則葉片達7枚以上時，抽穗果產量就不受影響。蕉果的櫥架壽命不受葉片影響。而全生育期的葉片數達9枚以上時，維青壽命與醣度亦不受影響；抽穗後再行割葉者，葉片數不影響維青壽命，但必須維持7枚以上葉片，醣度才不受影響。

To investigate the effect of leaf number on the plant height, circumference, hand number/bunch, finger number/bunch, bunch weight, green life, shelf life and Brix, the leaves of banana trees were removed weekly or at shooting. Plant height, circumference, hand number and finger number/bunch, and bunch weight might reduce with decreasing leaf number. Plant height and circumference were not affected at shooting when the banana tree had more than 5 leaves during the whole growing season; hand number and finger number/bunch were not significantly reduced when the trees had more than 7 leaves; bunch weight remained normal when the tree had more than 9 leaves. More leaves were maintained on the tree before shooting and defoliation was made at shooting stage, the results showed that bunch weight might not be reduced when the tree had more than 7 leaves. Shelf life of banana fruit might not relate to leaf number. While green life might not be affected at tree having more than 9 leaves during whole growing season, but not relate to the leaf number at shooting when the tree maintained more than 13 leaves before shooting. Brix of fruit increased with increasing leaf number; the Brix was not affected when the tree had more than 9 leaves during whole growing season or the tree had more than 13 leaves before shooting and maintained more than 7 leaves after shooting.