調整枝梢葉果比以提昇番石榴果實品質

Improvement of Guava Fruit Quality by Adjusting the Leaf-Fruit Ratio

10.29563/ZHWHGX.201109.0003

張林仁(Lin-Ren Chang)

番石榴 ； 果實 ； 品質 ； 葉果比 ； guava (Psidium guajava L.) ； fruit ； quality ； leaf-Fruit ratio

臺中區農業改良場特刊

108號（2011 / 09 / 01）

32 - 39

繁體中文

於番石榴秋果著果套袋後，將番石榴植株進行不同程度留果摘心處理（套袋後果粒前端枝條摘剪為4片、8片、12片、16片、20片葉等），觀察對番石榴果實生長與品質之影響。試驗結果顯示，果粒重有隨留葉量增加而較大之趨勢，果粒生育情形為葉片數愈多則果重愈大，以前端枝梢剪留12～16片葉片之果重較佳，但冬果之糖度低為一缺點。因套袋後不同程度摘心會導致番石榴萌發不同生長勢之新梢以製造養分供應果實所需，加上生育期間的肥培調整，以致生長後期之果實品質趨於一致，因此田間操作上值得進一步探討及改善。

Different fruit thinning and shoot tipping treatments were conducted after autumn-fruit bagging of guava, and the influences on the fruit growth and quality were investigated. The treatments were cutting the fruiting shoots into 4, 8, 12, 16 and 20 leaves that left in tip's end of the fruit. The results showed that the fruit weight was heavier as the leaf number increased, and the shoots that contained 12 to 16 leaves ahead of the fruit had better fruit size, whereas the defect was the low sugar contents of the winter-fruits. The new shoots that had various growth vigor were induced after shoot tipping treatments, therefore the transportations of nutrients to the fruit were different. Furthermore, the fertilization adjustments during the growth period also made the guava fruit quality in the late stage to a uniform condition, so the orchard practice needs further discussion and improvement.