Abstract
In North-eastern provinces of Japan, last two years the paddy rice plants had very poor ears on account of unseasonable weather, and consequently the crops severely failed. In connection with the researches on these bad crops, the auther studied first of all on the formation of blasted corns. The pot experiments for paddy rice plants were carried out in 1935,with 48 WAGNER'S pots. After harvest the examinations upon the growth and the determinations of total nitrongen, total reducing sugar solubled in 80% hot alcohol and starch (according to diastase method) in the stems and leaves of plants were made. And the following results were obtained upon the crops of rice plants which were cultivated under the additions of N, P and K at the constant quantities respectively to each pot, even though the combined forms of N were different. (1) Generally the weights of total corns and ripened corns of plants per pot which have the smaller ratio of blasted to total corns, viz.[numerical formula]are both heavier than those of plants which have the larger ratio. (2) Generally the ratio of stems plus leaves to total corns of plants per pot which have the smaller ratio of blasted to total corns is smaller than that of plants which have the larger ratio. (3) The ratio of sugar plus starch to nitrogen and the ratio of sugar to nitrogen in the stems and leaves of plants per pot which have the smaller ratio of blasted to total corns are both smaller than those of plants which have the larger ratio.
