Observations on the Roots of Rice Plants in Early-or Late-Season Culture by Means of Transparent Plastic Pots

透明合成樹脂ポツトによる早・晩期栽培水稲の根系の観察

Observations on the Roots of Rice Plants in Early-or Late-Season Culture by Means of Transparent Plastic Pots

Creators Yamagata Makoto

1. The root elongation and root system of rice plants and the oxidizing 01 reducing condition of paddy soil in the early-, normal- or late-season culture were investigated by using the transparent plastic pots. 2. The roots of rice plants elongated rapidly when the rice plants were culti- vated in the late-season and the development of roots was the best in the earlyseason culture. 3. In the late-season culture, the reduction of soil was observed at the earliest stage after transplanting and it was the greatest in the early-seasor culture. 4. The damage or death of the roots began in the shortest days since the transplantation in the case of late-season culture, being the longest in the case oi early-season culture.

[ISSN]0513-1715

[NCID]AN00244250