In spite of simple and cheap cultivation method, water broadcast-seeded rice demonstrates uneven and unstable seedling establishment per unit land area and requires more herbicide and labor-input for weed control. Three experiments were conducted in a phytotron at 18~circC to evaluate the adaptability of seed-mat mulching cultivation technologies in water seeded rice for the uniform seedling establishment and the inhibition of weed occurrence without herbicide application. Five different kinds of mat with different mesh sizes and fabric properties were tested. The emergence of rice was the highest in Lawn-mat treatment, being comparable with the control, in which seeds were sown without mat. The Lawn-mat also exhibited the lowest mat tension. Mat tension may influence the emergence of rice. And once it was soaked in water, it didn't maintain its original shape any more. The emergence rate of rice was the lowest in Safer-mat treatment. In Lawn-mat treatment, which was the most effective for rice emergence in the first study, the differences of emergence and seedling establishment of rice depending on the seeding position (upper, beneath, and between mats) treatments were negligible, while they were higher in dry seeds than in pre-germinated seeds treatment. The emergence as affected by the kinds of mat also showed the same trend when tested using barnyard grass. Depending on the kinds of mat, the inhibition effect of weeds was the greatest in Safer-mat and the poorest in Lawn-mat. These results strongly suggest the possibility that the uniform seedling establishment and weed management without chemical could be achieved simultaneously by seed-mat mulching through the combination of effective mat for the emergence of rice and another efficient mat for the inhibition of weed occurrence. This possibility was also tested in the field.

벼 기계이앙을 위한 어린모 육묘에서 종자 소독시 Metalaxy과 살충제를 혼합하여 소독ㆍ침종할 때 묘생육, 맺트형성, 입길병 및 뜸묘 발생에 미치는 효과를 조사하였던 바 다음과 같은 결과를 얻었다. 1. Metalaxyl(25% 수화제, 1,000배석)＋Prochloraz 종자침종처리는 무처리 (Prochloraz)에 비하여 근수가 많고 근장이 현저히 길어져서 어린모의 맷트형성이 아주 양호하였다. 2. Metalaxyl 종자침종처리는 어린모의 근활력을 높여서 뿌리생장을 왕성하게 하고 지상부의 생리적 활력을 증대시키므로서 입길병과 뜸묘의 발생을 방지하였다. 3. 종자소독제인 Prochloraz와 Metalaxyl 및 살충제를 혼합하여 종자를 소독ㆍ침종하더라도 어린모의 맷트형성이 촉진되었고 입묘병과 뜸묘 발생을 방지하였으며, 묘생육도 양호하였다 4. Metalaxyl 종자침종처리는 무처리에 비하여 뿌리생장을 현저히 촉진시키므로서 어린모맷트의 경도(2.5배)와 장력(1.5배)이 크게 증가되었다.