초록
현재 수박접목묘로서 가장 많이 이용되고 있는 박 종자의 발아율을 높이기 위하여 Priming, $GA_3$, 저온의 단일처리 효과와 저온처리 전후에 가하여지는 priming과 $GA_3$ 의 복합처리 효과를 조사하였던 바 그 결과를 요약하면 다음 과 같다. $3^{\circ}C$에서 1주간 행하여지는 저온처리, 100 mM $KNO_3$에 1일간 행한 priming, 0.01 mM에 1일간 행한 $GA_3$의 단일처리에 대한 발아율을 조사한 결과 저온처리에서 가장 높게 나타났다. 그러나 발아율은 저온처리 후의 priming 처리는 무처리보다는 낮았고 처리기간이 길어질수록 발아율이 현저히 감소되었다. 저온처리 전에 행한 priming과 $GA_3$ 처리는 저온처리 전의 $GA_3$ 처리에서와 같이 농도와 처리기간에 따른 차이가 없었다. 따라서 박의 종자 발아율 향상을 위한 종자처리로써 여러 개의 단일처리를 조합한 복합처리는 처리조합과 순서에 따라 발아율이 영향을 받는 것으로 사료된다.
The present experiment was done to determine the effect of priming, $GA_3$ and prechilling treatment alone and in their combination on germination of gourd (Lagenaria siceraria Standl.) seeds. Priming using $KNO_3$ and $GA_3$ were treated with different concentrations and periods whereas prechilling was done at only different periods. FR-yongjadaemok and FR-kunghap were used as test cultivars and their daily germination rates were measured at treatment levels. The best germination rate of each treatment was shown in a week prechilling at $3^{\circ}C$, a day priming with 100 mM $KNO_3$ and a day treatment with 0.01 mM $GA_3$ although the prechilling had the highest rate among them. The rate of priming treated after the prechilling was continuously decreased with its longer treatment periods and was less than no-priming. In addition, the rate of $GA_3$ treatment after the prechilling was not affected by its concentrations and treatment periods. Priming and $GA_3$ treatments before the prechilling, however, showed similar germiabilities between their treatment levels including no-treatment. The results mean that sequential order of available presowing treatments is important to enhancing the rate.
