水田雑草セリの耕種的防除法

概要

論文の詳細を見る
The ecological investigations on perennial weed, Oenanthe javanica D. C. were conducted m a paddy field of Fukuoka Prefectural Agricultural Experiment Station and various methods of cultural control were evaluated. 1) In paddy field, overwintering shoots from the stolon of Oenanthe javanica D. C. started to grow rapidly in the middle of April and the plant height and the length of stolon of the weed were approximately 12cm and 30cm respectively in the latter part of June when the puddling began. 2) The sprouting percentage of stolon was lowered when water content of the weed folliage became below 60 percent, and the sprouting viability of the stolon was entirely lost at 50 percent level. 3) Excised stem of the weed showed the highest rate of sprouting under the upland field condition of water content, whereas under the condition buried in the soil layer of 1〜2cm, the sprouting rate was in the range of 60 to 90 percent. The sprouting rate, however, was greatly lowered due to the burying under the wetting soil, and no sprouting was observed in the puddled soil even in the burying degree of 1〜2cm. 4) It was concluded that the highest control of Oenanthe javanica D. C. was obtained by a rather deep plowing 25 to 10 days before puddling, then burying foliage in the soil layer by puddling under shallow flooding condition.
日本雑草学会の論文
1980-08-25