PROBLEM TO BE SOLVED: To provide a method for promoting a reduction of acidity, an increase of sugar and coloring of pericarp of a fruit.SOLUTION: There are provided the method for promoting maturation of the fruit characterized by irradiating the fruit on a tree with natural light transmitting a red film or a blue film, particularly the method for promoting the reduction of the acidity in the fruit comprising irradiating the fruit on the tree with the natural light transmitting the red film and the method for promoting the increase of the sugar in the fruit comprising irradiating the fruit on the tree with the natural light transmitting the blue film.COPYRIGHT: (C)2009,JPO&INPIT【課題】果実の減酸、増糖、果皮の着色を促進する方法を提供すること。【解決手段】樹上の果実に、赤色フィルム又は青色フィルムを透過した自然光を照射することを特徴とする果実の成熟を促進する方法、特に樹上の果実に、赤色フィルムを透過した自然光を照射し果実の減酸を促進する方法、樹上の果実に、青色フィルムを透過した自然光を照射し果実の増糖を促進する方法。【選択図】なし
