暖地において密播した晩播水稲の生育および収量・品質特性

日本作物学会紀事

坂井 真⁶  田村 克徳⁶  梶 亮太¹  鍋島 弘明²  古畑 昌巳⁵  山下 浩⁶  岡本 正弘³  吉永 悟志³  森田 弘彦⁷  溝淵 律子⁴ 

[1] 東北農業研究センター;富山県新川農業普及指導センター;作物研究所;農業生物資源研究所;中央農業総合研究センター北陸研究センター;九州沖縄農業研究センター;秋田県立大学生物資源科学部

关键词: Dense Seeding;    密播;    Dry matter production;    乾物生産;    Hill-seeding;    点播;    Late seeding;    晩播;    Rice;    水稲;    Submerged direct seeding;    湛水直播;   

DOI  :  10.1626/jcs.77.281

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

We compared the yield of the late-season seeded rice with that of the regular-season seeded rice for 3 years (2001-2003) in southern Japan. The yields of late-season seeded and regular-season seeded rice were the same on the average of 3 years, but in 2003 the yield of late-season seeded crops was considerably lower than that of the regular-season seeded crops. Meteorological conditions and dry-matter production analysis revealed that the yield in 2003 was lower because early growth before the maximum tiller number stage was inferior to that in the other 2 years due to poor sunshine before the heading stage. Because the early growth tended to be better in the dense-seeded plot, the growth in the dense-seeded plot was compared with that in the standard-density seeded in the late-season seeding culture for 2 years (2004 and 2005). CGR and tiller number before the heading stage were higher in the densely seeded plot than in the standard-density seeded plot, and panicle number and yield were significantly higher in the densely-seeded plot. These results suggest that the dense seeding condition is effective to stabilize the yield in late season seeding culture.

【 授权许可】

Unknown