A type of pruning that removes the central bud of a plant. In the case of fruit trees, pinching the tops of the trees to a certain extent can help the fruit grow better. However, pinching too hard can cause the secondary shoots to grow too fast, depriving the fruit of nutrients and water, resulting in more fruit drop. In recent years, research has been conducted into labor-saving methods that use growth retardants (such as B9 or CCC) to prevent the shoots from growing too long and prevent physiological disorders of the fruit. Pinching is used to suppress growth and promote flowering and fruit set, as well as to improve leaf quality in plants such as tobacco, and to develop lateral branches to increase the number of fruits in plants such as soybeans and cowpeas. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
植物体の心芽を除去する剪定 (せんてい) の一種。果樹の場合は摘心によって新梢の生長をある程度押えると,果実の発育がよくなる。しかし摘心が強すぎると,副梢が強く伸びて果実にゆくべき養水分を奪い,落果が多くなる。人力による摘心の代りに生長抑制剤 (B9や CCCなど) を利用して新梢の徒長を防ぎ,果実の生理的障害の発生を防ぐ省力的方法が近年研究されている。摘心には生長を抑制して開花,結実を促進させるほか,たばこのように葉の品質をよくするためとか,大豆やささげなどのように側枝を発達させて結果数をふやす目的で行う場合などがある。
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