作季を異にする水稲の生態に関する研究 : 第I報泥炭質強湿田に於ける早期栽培稲の黒色根及び濃褐色根の発生経過 : 第II報千葉県内の各種水田に於ける早期栽培稲の黒色根及び濃褐色根の発生量

概要

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Rice plants, of two varieties, cultured early in the season-transplanted May 3- in comparison with those raised in an ordinary season-transplanted June 20- were studied in retard to the coloring phenomenon in their roots on ill-drained boggy, soils. Accumulation of starch in the basal parts of their leaf-sheaths and culms and Eh_6 and temperature of the soil in relation to the phenomenon were examined. I. In both of the cases compared, coloring of the roots became conspicuous at the stage of tillering climax when the starch contents in the culm-and leaf-sheath-bases began to decrease. Especially dark-brown colored roots were found highest in number at the time little after the early panicle-formation-stage of the plant, showing no clear differences between the early and ordinary cultures, while the occurrence of the black colored roots which reached the maximum of number about at the heading-stage were more frequent in the early culture plants. The phenomenon seemed not to be affected by the soil temperature, but was assumed to be related to some physiological conditions of the plant connected to lower Eh_6 of the soil. II. Results obtained by various kinds of soil from many places in Cihba Prefecture tested, indicated almost similar relations as above mentioned.
日本作物学会の論文
1957-07-01