穂肥窒素の増施が裸麦の登熟期間中の物質生産および窒素代謝に及ぼす影響

日本作物学会紀事

池尻 明彦¹  松永 雅志¹  鎌田 英一郎³  丹野 研一²  内山 亜希¹  金子 和彦¹  高橋 肇²  荒木 英樹² 

[1] 山口県農林総合技術センター;山口大学農学部;鳥取大学大学院連合農学研究科

关键词: 後期重点型施肥;    窒素含有率;    窒素代謝;    登熟期間;    裸麦;    ç©‚è‚¥;    Naked barley;    Nitrogen contents;    Nitrogen metabolism;    Ripening period;    Topdressing at spike formation stage;    Topdressing emphasizing later stage;   

DOI  :  10.1626/jcs.85.288

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

We investigated the changes in dry weights and nitrogen contents of plant organs during the grain filling period in naked barley cultivar “Toyonokaze.” Three treatments with different amounts of nitrogen fertilizer at the spike formation stage (SFS) were given in 2012/2013 and 2013/2014. Changes in dry weight and nitrogen content of each productive stem were similar in all the treatments in both seasons. Total dry weight increased from full heading time (FHT) to four weeks after FHT in both seasons. Grain weight increased from two weeks after FHT to maturity in 2012/2013, and did from two weeks to five weeks after FHT in 2013/2014. The amount of nitrogen in the total above-ground part increased from four weeks after FHT to maturity in 2012/2013, while it did not increase during the grain filling period in 2013/2014. That in the grain increased throughout the grain filling period in 2012/2013, but not from five weeks after FHT to maturity. The nitrogen in grain might come not only from vegetative organs by remobilization, but also from absorption from soil during the grain filling period. Thus, how the grain accumulated nitrogen during the later grain filling period varied with the experimental season.


【 授权许可】

Unknown