벼 다수계 품종에 대한 수발아 정도를 몇 가지 요인과 관련하여 '영남조생'외 5품종을 공시하여 검토한 결과, 1. 수발아는 출수후 40∼45일경인 황숙기 및 완숙기에 심한 경향이었다. 2. 시비량에 따른 수발아는 보비보다 다비에서 심한 경향이었다. 3. 품종별 수발아 정도는 조생종인 '영남조생'과 '밀양21호'에서 심한 편이었다. 4. 수발아가 용이한 입지조건은 배수가 불량하고 통풍이 잘 되지 않는 산간곡간답에 해당되었다.
This experiment was conducted to find out the factors governing the viviparous germination of In. ~times Ja. type rice varieties. Six varieties, i.e., Milyang 21, Raekyeong, Milyang 30, Yeongnamjosaeng, Nopoong and Mansuk, were used for this experiment. The viviparous germination easily occurred between 40 to 45 days after heading, and was easier in yellow-ripe stage or full-ripe stage than dough-ripe stage. The use of exceeding fertilization induced more viviparous germination than ordinary one. The early varieties such as Yeongnam-josaeng and Milyang 21, easily occurred the viviparous germination. The local conditions of viviparous germination were usually poorly drained soils and narrow alluvial valleys where were high humidity prevailed.