Abstract
This study was carried out to find out the effects of date and number of defoliation by different seeding date on growth and yield of perilla. Saeyuepsildlkkae was seeded from April 30 to June 30 at 20 days interval and defoliated from June 30 to Aug. 15 with different defoliation number. 1. Days to emergence, flowering, and maturing were not significantly influenced by defoliation, but those were shortened as seeding date was delayed. The interaction between defoliation and seeding date showed no significant difference. 2. Stem length, number of nodes on main stem, and weight of dry stem were not significantly affected by defoliation, but those were decreased as seeding date was delayed. 3. Yield of fresh loaves was not significantly influenced by seeding date up to May 20, but markedly decreased by the later seeding date. 4. Cluster length and number of cluster per plant were not affected by seeding date, but number of capsules per cluster was decreased from 32 to 25 and 1,000 grain weight was increased from 3.42 to 4.62g as seeding date was delayed. 5. Grain yield was not significantly affected by defoliation and seeding date up to June 10, but markedly decreased by seeding date June 30.
채소로서 들깨 잎을 이용함에 따른 종실 수량에 미치는 영향을 구명 하고자 새엽실들깨를 4월 30일부터 20일 간격 4회 파종하여 채엽 유무에 따른 시험한 결과를 요약하면 다음과 같다. 1. 채엽에 따른 개화 및 성숙기는 유의한 차이가 없었으나, 파종이 늦어짐에 따라 출아일수, 개화기 그리고 성숙기는 단축되었으며 , 채엽 유무와 파종기간 상호작용에서는 유의한 차이를 보이지 않았다. 2. 채엽 유무에 따른 지상부 생육은 차이가 없었으나, 만파할수록 경장은 140cm에서 96cm, 주경절수는 19마디에서 11마디, 주당 건경중은 541g에서 186g로 감소하였다. 3. 엽수량은 5월 20일까지 파종에서는 차이가 없었으나, 이후 파종이 늦어짐에 따라 현저하게 감소하였다. 4. 화방군장과 주당 화방군수는 파종기에 따른 유의성이 없었으나, 화방당 삭수는 파종이 늦어짐에 따라 32개에서 25개로 감소하였으나, 1,000립중은 3.42g에서 4.62g으로 증가하였다. 5. 종실수량은 채엽 유무에 따른 파종기 간 차이는 없었으나, 파종기에 따라 6월 10일까지는 차이가 없었으나, 이후 파종이 늦어짐에 따라 감소 폭이 컸다.
