논문 상세보기
pp.430-433
본 연구는 벼 무논직파 재배시 잡초성벼 발생 경감기술을 구명하고자 폿트시험으로 잡초성벼 방제 약제를 선발한 후 선발된 약제를 포장시험으로 처리하여 잡초성벼 제초효과를 검토한 결과는 다음과 같다.
1. 약제 처리후 담수기간별 잡초성벼 방제가를 보면 butachlor는 담수 10일부터 방제가가 100%이었으며 pretilachlor는 15일에 효과가 있었다.
2. 제초제 처리후 담수기간별 벼 입모율을 보면 10일후 벼파종시에는 약해가 다소 있어서 입모율이 떨어졌으나 15일후에는 butachlor는 83%, pretilachlor는 95%이었다.
3. 잡초성벼 엽기별 제초제 처리효과는 0 ~ 1엽기는 87 ~100%이었으나 2엽기에는 9 ~ 12%이었다. 잡초성벼의 포장방제가는 pretilachlor 기준량에서 90%, 배량에서 99%이었으며, 약해는 pretilachlor 배량에서 1 정도였다.
4. 벼의 입모율은 처리간 비슷하였으나 간장 및 수장은 제초제 처리에서 크고 길었다. 수량구성요소는 제초제 처리효과가 인정되었으며, 쌀 수량은 무처리 287 kg/10 a에 비해 pretilachlor 기준량에서 54%, 배량에서 55% 많았다.
This study was conducted to effectively control the weedy rice by using herbicides and treatment methods in rice wet-direct hill seeding cultivation. The effective herbicides were selected in pot experiment and the efficacy of the selected herbicides by the various treatments was evaluated in field experiment. In treatment of water flooding duration after herbicide application, butachlor and pretilachlor showed 100% efficacy in 10 and 15 days flooding, respectively. Rice seedling establishment rates in butachlor and pretilachlor application were 83% and 95% respectively in 15 days flooding, however, the rates were decreased in 10 days flooding. The efficacy of herbicides were 87 ~ 100% at the zero and one-leaf stage of weedy rice, but 9 ~ 12% at over two-leaf stage. The efficacies of pretilachlor treated with standard and double dose at 15 days before seeding were 90% and 99%, respectively. At double dose of pretilachlor treated at 15 days before seeding, rice injury was appeared as level 1. Seedling establishment rates were not significantly different among the treatments. However, stem length, panicle length, and milled rice yield were higher in herbicide applied plots. Milled rice yield were higher in standard and double dose of pretilachlor treatment by 54% and 55% respectively than in the control (287 kg/10a).
폿트 시험
포장시험
결과 및 고찰
폿트 시험
포장 시험
적 요
ACKNOWLEDGMENTS
REFERENCES
