PROBLEM TO BE SOLVED: To provide a method for quickly and securely at units of trees judging the spontaneous dormancy awakening period of a low temperature requiring deciduous tree, without being affected by weather warming and abnormal weather.SOLUTION: This method for judging the spontaneous dormancy awakening period of a low temperature requiring deciduous tree includes judging whether the spontaneous dormancy awakening period arrives or not, using as an indicator, the content of translocation sugar in vessel liquid. Furthermore, the judging method includes judging whether the spontaneous dormancy awakening period arrives or not by using as an indicator, a Brix indication value or a TOC content of the vessel liquid, and also the judging method includes judging whether the spontaneous dormancy awakening period arrives or not by mixing the vessel liquid with a potassium permanganate solution and using as an indicator, a color tone after color reaction of the mixed liquid.COPYRIGHT: (C)2013,JPO&INPIT【課題】 気候温暖化や異常気象に影響されることなく、低温要求性落葉樹の自発休眠覚醒期を‘迅速に’且つ‘樹単位で確実に’判定する方法を開発することを目的とする。【解決手段】 導管液における転流糖の含有量を指標として、自発休眠覚醒期に達したかを判定することを特徴とする、低温要求性落葉樹の自発休眠覚醒期判定方法を提供する。また、前記導管液のBrix指示値, 又は, TOC含有量を指標として、自発休眠覚醒期に達したかを判定する前記判定方法、;前記導管液と過マンガン酸カリウム溶液とを混合し、当該混合液の呈色反応後の色調を指標として、自発休眠覚醒期に達したかを判定する前記判定方法、を提供する。【選択図】 図1
