深水栽培による米粒外観品質向上要因の解析

日本作物学会紀事

寺尾 富夫²  千葉 雅大²  松村 修²  渡邊 肇¹  高橋 能彦¹ 

[1] 新潟大学大学院自然科学研究科;中央農業総合研究センター

关键词: Chalky grain;    白未熟粒;    Deep-flood irrigation;    深水栽培;    Leaf area;    葉面積;    Nitrogen in leaf blade;    葉身窒素;    NSC;    Rice;    イネ;   

DOI  :  10.1626/jcs.80.13

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Deep-flood irrigation (DFI) is a method used to suppress the occurrence of chalky grains, which is becoming a serious problem due to global warming. The mechanism of reducing chalky grains by DFI was analyzed with regard to the source ability of stems and leaves that supply carbohydrate to the grains because shortage of carbohydrate flow into the endosperm is considered to be the main cause of chalky grains. DFI increased the amount of nonstructural carbohydrate (NSC) reserved in stems and leaf sheaths at the full heading stage. This result suggests that DFI increased the translocation of carbohydrate reserved in stem and leaves before heading. In addition, DFI increased the amount of nitrogen in leaf blades at the full heading stage as well as leaf area at the ripening stage, which suggests that DFI promotes photosynthesis in the ripening process. In conclusion, DFI increases both the amount of carbohydrate reserved before heading and photosynthetic ability after heading, consequently decreasing the occurrence of chalky grains.

【 授权许可】

Unknown