小麦の冷害に関する研究 : 第10報開花期前後の低温による稔実障害の人為的作成実験

概要

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In order to confirm the presumption that the abnormal ripening of wheat occurred in some regions involving the region of Kawanakazima-machi might be caused by the low temperature before and after the flowering stage, the experiments on artificial induction of the abnormal ripening were performed. The results of experiments were as follows. 1. Ears at 1-8 days after the beginning of flowering were subjected to the low temperature treatment, -0.5℃ or -1℃ for 5 hours, accompanied water spray. The artificially induced injury was similar to the natural injury occurred in Kawanakazima-machi. 2. Artificial induction of the injury required such a low temperature as -0.5℃ at least, while the natural injury was caused by a temperature above 0℃. 3. Resistance to the low temperature of ears at few days before the beginning of flowering was higher than that of ears at 0-14 days after the beginning of flowering. 4. Kinds and frequencies of the injured grains or ears varied in accordance with the progress of day after the flowering. 5. Most of the injured grains showed continuation of development at least for 1-2 days after the low temperature treatment.
日本作物学会の論文
1972-09-28