米粒の脂肪含有率におよぼす窒素施肥の影響に関する研究

概要

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Effect of amount and fertilized period of nitrogen, amount of phosphate, top dressing of potassium and amount of calcium silicate on fat content in rice kernel was observed. Results were summarized as follows: Nitrogen heavily fertilized, especially at ripening period, fat content in rice kernel decreased remarkably. Effect of amount of phosphate, potassium and calcium silicate on fat content was not recognized clearly. Above-mentioned effect of nitrogen was connected to percentage of total nitrogen in leaves at heading date, protein content in rice kernel and percentage of full ripened grain. In these studies, correlation coefficient and partial correlation between fat content (X_1) and above factors were calculated and obtained results were as follows: In relation to percentage of total nitrogen content in leaves at heading date (X_2) r_<12>=-0.9066^<***>, r_<12.4>=-0.7355^*, r_<12.3>=-0.5670^<ns> In relation to protein content in rice kernel (X_3) r_<13>=-0.8649^<**>, r_<13.4>=-0.7636^*, r_<13.2>=-0.1971^<ns> In relation to percentage of full ripened grain (X_4) (except No. 8 plot) r_<14>=0.8634^<**>, r_<14.3>=0.7609^*, r_<14.2>=0.5862^<ns>
日本作物学会の論文
1973-03-28