Abstract
The protein content of lowland and lowland-upland hybrid brown rice was investigated on the non-glutinous and glutinous types by upland polyethylene film mulching culture. The upland mulching culture gave higher protein content in lowland brown rice as compared with the lowland culture. The average increasing index, i.e., (upland mulching culture/lowland culture) × 100, of the non-glutinous and glutinous types was 120.6 % and 122.6 %. The upland mulching culture also gave higher protein content in lowland and lowland-upland hybrid brown rice as compared with the upland culture on the same manuring condition. The average increasing index, i.e., (upland mulching culture/upland culture) × 100, is as follows : a) lowland brown rice : non-glutinous type 106.0 % and glutinous type 107.6 %. b) lowland-upland hybrid brown rice : non-glutinous type 106.9 % and glutinous type 107.2 %. Regarding the protein content of the lowland brown rice by the upland mulching and upland cultures, it was shown that Hokkaido district variety was higher than Tohoku district variety.
