Chikushino-shi, Japan
Chikushino-shi, Japan

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Cui J.,Tianjin Agricultural University | Matsue Y.,Fukuoka Agriculture Res. Cent | Kusutani A.,Kagawa University | de Liang D.,Tianjin Agricultural University | And 2 more authors.
Japanese Journal of Crop Science | Year: 2011

In order to examine the difference in taste preference for cooked rice between the Japanese and Chinese individuals, we performed a sensory test on japonica type Chinese rice cultivars. A significant positive correlation was observed in the overall eating-quality between the Japanese and Chinese panels. However, some Chinese rice cultivars that were given a low rank by the Japanese panel were evaluated highly palatable by the Chinese panel. This difference may be attributed to the difference between the Japanese and Chinese in the contribution of each criteria to the evaluation of the overall eating-quality. These results indicate that it is possible to breed highly palatable cultivars different from Japanese taste preference. A significant positive correlation was observed between the Japanese and Chinese panels in the appearance, taste and stickiness, but not in hardness. The Japanese panel mainly determined the overall eating-quality by stickiness and appearance, whereas the Chinese panel determined it by stickiness and hardness. In particular, the taste preference for hardness of the Japanese panel differed from that of the Chinese panel, the Japanese panel preferred soft rice while the Chinese panel preferred hard rice.


Tanaka K.,Fukuoka Agriculture Res. Cent | Tanaka K.,Kyushu University | Miyazaki M.,Fukuoka Agriculture Res. Cent | Uchikawa O.,Fukuoka Agriculture Res. Cent | Araki M.,Fukuoka Agriculture Res. Cent
Japanese Journal of Crop Science | Year: 2010

The effects of nitrogen content and the rate of nitrogen uptake on kernel quality of rice were examined in relation to nitrogen application and transplanting time. We clarified the amount of nitrogen application and transplanting time optimal for the soil with differences in soil fertility. On condition that the number of kernel per area was optimum, milky white, white-based and white-back kernels tended to decrease with increasing nitrogen content, and increasing rate of nitrogen uptake at panicle formation stage and full heading time. The rate of soil nitrogen absorption by rice plant, and nitrogen content of rice became high at the panicle formation stage and full heading time when transplanting time was delayed. In the field with a high soil fertility, the rate of nitrogen uptake during the panicle formation stage and full heading time, so that inspection grade was improved by the late transplanting and decreased amount of basal application. In the field with moderate soil fertility, inspection grade and yield were improved by topdressing with controlled release fertilizer at the panicle formation stage and keeping nitrogen content high at the panicle formation stage. The technique that maintains high nitrogen content and high nitrogen uptake rate during the maximum tiller number stage and panicle formation stage may be important for improving inspection grade and protein content of rice grains.


Iwabuchi T.,Fukuoka Agriculture Res. Cent | Hamachi Y.,Fukuoka Agriculture Res. Cent | Miyazaki M.,Fukuoka Agriculture Res. Cent | Uchikawa O.,Fukuoka Agriculture Res. Cent
Japanese Journal of Crop Science | Year: 2011

To ascertain the factors, involved in the low protein content of wheat grain,which is recently a serious issue in northern Kyushu, we investigated the relationship between the protein content of wheat grain and the yield, yield components and climatic conditions using the wheat cultivar 'Chikugoizumi' in northern Kyushu cultivatied by the same method from 1993 to 2008 in northern Kyushu. The protein content of grain decreased as the 1000-kernel weight and yield increased, indicating that the protein of grain content was negatively correlated with the yield and 1000-kernel weight. The 1000-kernel weight increased with a decrease in precipitation and an increase in duration of sunshine, and the yield increased with an increase in duration of sunshine during the ripening period of wheat. This indicated that the 1000-kernel weight was negatively correlated with precipitation, and that the yield and 1000-kernel weight were positively correlated with the duration of sunshine during the ripening period. These results suggest that the low protein content of wheat grain was a result of high yield or heavy 1000-kernel weight due to less precipitation and longer duration of sunshine during the ripening period.

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