水稲品種における幼植物の挫折強度と耐ころび型倒伏性の関係

日本作物学会紀事

吉田 智彦¹  坂田 勲²  坂井 真³  小柳 敦史³  井辺 時雄³ 

[1] 宇都宮大学;岐阜県飛騨地域農業改良普及センター;農業・生物系特定産業技術研究機構

关键词: Basal part of the seedling;    下部茎;    Basal stem;    茎葉部基部;    Breaking resistance;    ころび型倒伏;    Direct sowing cultivation;    湛水直播栽培;    Pushing resistance;    挫折強度;    Rice;    イネ;    Root lodging resistance;    押し倒し抵抗;    Seedlings;    幼植物;   

DOI  :  10.1626/jcs.74.172

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

For breeding rice with a high root-lodging resistance, which is important for direct seeding in subnerged paddy fields, selection of cultivars at the seedling stage is preferable. Twenty typical Indica and Japonica rice varieties were tested for root-lodging resistance and breaking resistance of the basal stem. Breaking resistance at the basal part of the seedling in the 20 varieties was measured using a push pull gauge at 23 days after sowing. It varied from 12.9 N to 27.9 N and lodging resistance highly correlated with the breaking resistance. Next, we selected eight varieties and examined the change in pushing resistance and breaking resistance of basal stem after heading. None of the varieties showed any significant change pushing resistance. Breaking resistance was significantly reduced in three varieties, but it did not change in five varieties. Pushing resistance at any time after heading was highly correlated with breaking resistance of the basal stem in eight varieties. Thus, it is concluded that the lodging resistance at the ripening stage of the rice varieties can be evaluated by the breaking resistance at the basal part of the seedlings.

【 授权许可】

Unknown