Studies on the Early Season Cultivatuin of Upland-Rice : 1. Characters of seedling studied in terms of post-transplantation withering in early transplanting cultivation.

[摘要] Experiments were carried out to study the oharacters of seedling related to the post-transplantation withering in early-transplanting of upland-rice. The results were as follows. (1) The following characters are related to the post-transplantation withering: i. When the following characters increase, the witherings increase. Plant height, green weight, leaf surface area, amount of transpiration, and content of total nitrogen ii. When the following characters increase, the witherings decrease. Carbohydrate content and dry-matter percentage. (2) Above listed characters are varied by the growing methods of seedlings. To sum up, however, such seedlings as under mentioned less wither by transplanting. i. Seedlings grown in earlier season. ii. Seedling at the 4.0∼4.5 leaf stage. iii. Seedlings grown in the instrument for nursery ("Shitunaiikubyoki") iv. Upland nursery seedling grown under light application of nitrogen or subjected root prunning before transplanting.

[学科分类] 农业科学（综合）