On the Culture of Upland Rice by Early Transplanting in a Cool Region

Present study has been curried out from 1956 to 1958, for the purpose of security as well as yield increase in the culture of upland rice in a cool region. The important remarks concluded throughout this study are as follows: (1) In the transplanted groups, an early heading. date and a high percentage of available stems are observed as compared with the direct-sowned, thus the yield of grain increases from 40 to 60 per cent. It is seen also that it increases with the number of ears in every varieties of the transplanted. (2) As the growing period of rice is short in Tohoku district, it is necessary to secure the number of ears in the early season, by the selection of good seedlings and dense planting (3, 000 hills per one are and about 5 seedlings per one hill) in accompany with the good rooting. Therefore, it is advisable to be cultivated in the fields having the irrigation facilities. As the fertilizer, it is desirable to put a large amount of phosphate. That is, in the rich phosphate groups, a good growth of rice plant after transplanting, a large number of ears and a tendency of early heading are observed as compared with the poor ones. (3) It seems at present that such a paddy-rice variety as Fujisaka No. 5 is more suitable for transplanting than uplan-drice varieties, because Fujisaka No. 5 shows a good rooting, a vigorous early growth anh a little lodging by dense planting in a cool region.