Yield and Eating Quality of Rice Cultivar Kinuhikari in Early Season Culture in Warmer Area

[摘要] The effects of the transplanting times and the methods of feritilizer application on the yield and eating quality of rice cultivar Kinuhikari were investigated. The transplantings were made on March 28 (early season culture, ES) and on June 17 (normal season culture, NS). The methods of fertilizer application were the heavy manuring culture (HM), the standard manuring culture (SM) and the organic manuring culture (OM). 1) The averages of the daily mean temperature from the heading time to the maturing time were 26.9°C in ES and 24.6°C in NS. 2) The yield in ES was higher than that in NS. The number of grains per m2 indicated significant positive correlation with the yield and significant negative correlation with the percentage of ripened grains, respectively. The percentage of ripened grains in ES was higher than that in NS at the same lavel of the number of grains. 3) In ES, amylose content was lower but maximum viscosity and breakdown values were higher than those in NS. The order of protein content in relation to the method of fertilizer application was ; HM>SM>OM. The protein content showed significant negative correlation with the percentage of ripened grains. 4) The palatability of rice after cooking showed significant negative correlation only with protein content. In this experiment, the palatability of rice after cooking was more strongly affected by the method of fertilizer application than the transplanting time.

[学科分类] 农业科学（综合）

[关键词] Amylographic characteristics;アミログラム特性値;Amylose content;アミロース含有率;Eating quality;移植期;Method of fertilizer application;収量;Protein content;食味;Rice;水稲;Transplanting time;施肥法;Yield;タンパク質含有率