Abstract
The purpose of this research is to investigate impact of the organic mixture materials (OMM) and mixture oil cake (MOC) on the early growth of direct-seeded rice, transplanted rice, Echinochloa crus-galli (Echinochloa crus-galli var. formosensis Ohwi.) and Aneilema keisak Hassk. Direct-seeded rice and transplanted rice are both treated with 0.63~1.88ton ha-1 organic mixture materials and mixture oil cake respectively. The mortality rate in direct-seeded rice was 42.1~71.2% and 30.0~85.2%, whereas growth of transplanted rice was improved 8.1~25.7% and 2.8~11.0%. Direct-seeded rice and transplanted rice are both treated with 1.88ton ha-1 organic mixture materials and mixture oil cake respectively. The weed that died about 52.8% and 38.9% was Echinochloa crus-galli, and the root of the weed was suppressed by 81.9% and 83.1%, the shoot by 53.1% and 60.5%. Small quantities of organic mixture materials and mixture oil cake also were highly effective in controlling Aneilema keisak Hassk. The organic materials have significant inhibition effect on direct-seeded rice, Echinochloa crus-galli and Aneilema keisak Hassk after 0~3 days, 0~5 day and 0~7 days treatment. The dissolved oxygen increased evidently as the time pass after treatment. The oxidation-reduction activity continued to increase rapidly. These results suggest that the organic mixture materials and the mixture oil cake seems to contain an active ingredient that are effective in killing weeds.
본 연구는 유기복합제와 혼합유박이 담수 직파벼, 이앙벼, 물피 및 사마귀풀의 생육에 미치는 영향을 파악하기 위하여 수행되었다. 유기복합제와 혼합유박을 0.63~1.88ton ha-1 처리시 직파벼는 무처리구에 대비 각각 42.1~71.2%, 30.0~85.0% 출현이 억제되었고, 이앙벼는 지상부가 각각 8.1~25.7%, 2.8~11.0%, 더 증가되었다. 유기복합제와 혼합유박을 1.88ton ha-1 처리시 물피는 각각 52.8%, 38.9%의 출현이 억제되었으며, 지상부의 생장은 53.1%와 60.5% 억제되었다. 사마귀풀은 유기질자재 2종 모두 낮은 처리량에서도 높은 감수성을 보였으며, 직파벼는 파종 후 0~3일, 물피는 파종 후 0~5일, 사마귀풀은 파종 0~7일 후에 처리시 높은 방제효과를 나타내었다. 용존산소량은 무처리구에 비하여 시간이 경과할수록 경시적으로 증가되었고, 산화환원전위는 유기질자재 처리 후 토양의 환원화 현상이 급격히 진행되었다. 또 유기복합제와 혼합유박 자체에 잡초종을 억제할 수 있는 잠재성을 보유하고 있는 조성성분이 있는 것으로 생각되었다.