湛水直播水稲における冠根の伸長角度および稈基部の物理的性質と耐倒伏性との関係

日本作物学会紀事

有馬 進²  古畑 昌巳¹ 

[1] 中央農業総合研究センター北陸研究センター;佐賀大学農学部

关键词: Bending stress;    曲げ応力;    Breaking strength of culm with leaf sheaths;    葉鞘付挫折時モーメント;    Crown root;    冠根;    Growth angle of root;    根の伸長角度;    Lodging resistance;    耐倒伏性;    Pushing resistance;    押し倒し抵抗値;    Rice;    イネ;    Section module;    断面係数;   

DOI  :  10.1626/jcs.76.519

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In submerged direct seeding such as hill seeding and row seeding, lodging was not caused easily compared with broadcast seeding. Not only deep rooting but also physical characteristics of the basal culm were considered to contribute to lodging resistance. Then, we examined the correlation of lodging resistance with the rooting behavior and physical characteristics of the basal culm in 14 rice cultivars direct seeded in a flooded paddy field. As a result, deep rooting, the section module and breaking strength of culm with leaf sheaths were significantly correlated with lodging resistance regardless of seeding depth. In addition, the standardized partial regression coefficient and partial correlation coefficient between lodging resistance and breaking strength of culm with leaf sheaths was higher than lodging resistance and deep rooting. These results suggest that lodging resistance in rice cultivated by submerged direct seeding such as hill seeding and row seeding was more closely correlated with the physical characteristics of the basal culm than with deep rooting.

【 授权许可】

Unknown