水稲群落における次位・節位別分げつの1穂精玄米重と葉面積および葉面積あたりの葉身窒素量の垂直分布との関係

日本作物学会紀事

金田 吉弘²  佐藤 馨¹  金 和裕¹  三浦 恒子¹  佐藤 敦²  柴田 智¹ 

[1] 秋田県農業試験場;秋田県立大学生物資源科学部

关键词: Leaf area;    葉面積;    Nitrogen content of leaves per leaf area;    葉面積あたりの葉身窒素量;    Nodal order of tiller;    次位別分げつ;    Nodal position of tiller;    節位別分げつ;    Rice canopy;    水稲群落;   

DOI  :  10.1626/jcs.75.191

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The vertical distributions of leaf area and nitrogen content of leaves per leaf area were examined in the tillers at each nodal position and nodal order in rice canopy to clarify the factors that cause the difference in the weight of brown rice per panicle among the tillers at different nodal positions and orders. The tillers bearing heavy brown rice had many spikelets per panicle without reduction in the number rate of brown rice (>1.9 mm) to unhulled rice and thousand-grain weight. They also had a large leaf area without a significant difference in leaf area per spikelet. In addition, they had many leaves with a high nitrogen content per leaf area in the upper layer of rice canopy where the relative irradiance was high. These results suggest that the difference in the vertical distributions of leaf area and the nitrogen content of leaves per leaf area among the tillers after heading time in the rice canopy causes the difference in the weight of brown rice per panicle among the tillers at different nodal positions and nodal orders in the rice canopy.

【 授权许可】

Unknown