Abstract
The effects of dense planting on the growth, yield and grain quality of rice (Oryza sativa L. cv. Koshihikari) late transplanted to avoid a high temperature during the ripening period were investigated for two years. Dense planting, 21.2 and 24.2 hills/m2, increased the number of panicles resulting in higher yield compared with normal planting, 18.2 hills/m2. In addition, it increased the yield in 2008 with slightly solar radiation during the ripening period. Late transplanting with dense planting increased the grain quality in both years, and in addition, improved grain quality in 2007 with much solar radiation during the ripening period. These results suggest that the dense planting in late transplanting is effective in improving yield and grain quality, and also in securing solar radiation while avoiding high temperature during the ripening period.
