벼상자육묘(箱子育苗)에서 살균제(殺菌齊)와 생장조절제(生長調節劑) 처리(處理)가 묘생육(苗生育) 및 생리장해(生理障害)에 미치는 영향(影響)

Effect of Several Fungicides and Growth Regulators on Rice Seedling Growth and Damping-off in Seedling Boxes for Machine Transplanting

벼상자육묘(箱子育苗)에서 살균제(殺菌齊)와 생장조절제처리(生長調節劑處理)가 묘생육(苗生育) 및 생리장해(生理障害)에 미치는 영향(影響)을 구명(究明)코자 삼강(三綱)벼와 낙동(洛東)벼를 공시(供試)하여 시험(試驗)하였던 결과(結果)를 요약(要約)하면 다음과 같다. 살균제처리(殺菌齊處理)에서 삼강(三綱)벼는 Metalaxyl과 SF8002 처리구(處理區)가, 낙동(洛東)벼는 SF8002와 Metalaxyl처리구(處理區)가 초장(草長)과 3엽(葉) 및 4엽(葉)이 뚜렷한 신장교과(伸長效果)를 보였다. 건물중(乾物重)은 Metalaxyl구(區)가 가장 무거웠고 엽수(葉數)와 묘충실도(苗充實度)는 Dachigaren청리구(廳理區)가 양호(良好)하였으며, 살균제처리구(殺菌齊處理區)가 무처리(無處理)에 비(比)해 입고병발생(立枯病發生)이 적었다. 생장조절제처리구(生長調節劑處理區)에서 삼강(三綱)벼에서는 BA처리구(處理區)가, 낙동(洛東)벼에서는 GA，처리구(處理區)가 초장(草長)이 가장 길었으며, ABA(處理區)가 초장(草長)이 가장 작았고, ABA와 CCC처리구(處理區)가 신근발근력(新根發根力)이 왕성(旺盛)했다. 살균제(殺菌齊)+생장조절제처리구(生長調節劑處理區)에서 살균제(殺菌齊)+GA, 구(區)와 Metalaxyl+생장조절제처리구(生長調節劑處理區)가 초장(草長)이 가장 길었으며, Isoprothiolane+생장조절제처리구(生長調節劑處理區)가 초장(草長)이 가장 짧았다. Dachigaren+IAA 처리구(處理區)가 건물중(乾物重)과 묘충실도(苗充實度)가 양호(良好)하여 묘소질(苗素質)이 좋았으며, 살균제(殺菌齊)+생장조절제처리구(生長調節劑處理區)가 무처리(無處理)보다 입고병발생(立枯病發生)이 적었다. 또한 삼강(三綱)벼에서는 Metalaxyl+IAA 처리구(處理區)가 낙동(洛東)벼에서는 Dachigaren+IAA 처리구(處理區)가 지상부재생력(地上部再生力)이 양호(良好)했다.

This study was conducted to evaluate the effect of several fungicides and growth regulators on rice seedling growth and damping-off in seedling boxes for machine transplanting. Fungicide treated plots were better seedling growth, shoot regrowth, rooting ability, change of moisture content than those of nontreated plot. Metalaxyl application of Samgangbyeo and SF8002 application of Nagdongdyeo apparently increased plant height, length of the third leaf and fourth leaf. And metaiaxyl application highly increased dry weight. Fungicide treated plots were highly effective in reducing the incidence of damping-off. Benzyladenine application of Samgangbye and $GA_3$ application of Nagdongbyeo apprently increased plant height. But ABA application highly decreased plant height. ABA application and aCE application resulted in highly increased rooting ability. Fungicide and $GA_3$ treated plots, Metalaxyl and growth regulator treated plots resulted in highly increased plant height. I soprothiolane and growth regulator treated plots resulted in decreased plant height. Dachigaren and lAA treated plot apprently increased dry weight and shoot dry weight/plant height. Fungicide and growth regulator treated plots were highly effective in reducing the incidence of damping-off.