水稲の分枝根形成に及ぼす窒素施肥量および茎葉部への遮光・剪葉の影響

概要

論文の詳細を見る
The lateral branching habit of crown roots was investigated on rice plants grown under different environmental conditions. The crown roots were classified here into the following the three types according to their acropetally decreasing rate of diameter; i. e. the crown roots of the low-(A-type), the intermediate-(B-type) and the high-(C-type)decreasing rates, respectively. Close relations were found between the branching habit and the crown root types mentioned above, irrespective of the differences in the environmental conditions. Namely, the density of laterals on the crown root axes was higher in the C-type roots, decreasing successively in thc B- and the A-type roots, while the length of laterals showed a reverse tendency. Nitrogen application, defoliation and shading, enhanced predominantly the formation of the C-type roots during reproductive phase of the plants. It might be assumed that such environmental conditions may influence on the lateral root formation through modifying the composition of each type of crown roots in the whole root system.
日本作物学会の論文
1981-12-10