보리종자의 수확시기, 저장온도 및 기간에 따른 휴면성과 발아율에 관한 연구

Effect of Harvest Date after Heading. Storage Temperature and Duration on the Dormancy and Germination Percentage in Barley Cultivars

  • Chun, J.U. (Wheat and Barley Research Institute, O.R.D.) ;
  • Lee. E.S. (Wheat and Barley Research Institute, O.R.D.) ;
  • Park, M.W. (Wheat and Barley Research Institute, O.R.D.) ;
  • Cho, C.H. (Wheat and Barley Research Institute, O.R.D.) ;
  • Jeong, D.H. (Wheat and Barley Research Institute, O.R.D.) ;
  • Lee, H.J. (College of Agriculture, Seoul National University)
  • 발행 : 1983.12.01

초록

보리 7개 품종에 대한 수확시기, 저장온도와 기간에 따른 휴면성 타파정도와 발아율 관계를 검토코자 실시한 결과를 요약하면 다음과 같다. 1. 보리 종자의 평균 발아율은 고온($25^{\circ}C$)에 비하여 저온(15$^{\circ}C$)에서 37%가 높았으며, 1% $H_2O$$_2$와 3ppm GA$_3$ 처리의 경우 발아율이 93-95%로 휴면타파에 효과적이었다. 2. 고온의 Germination rate index(GRI)와 발아율과는 높은 정의 상관이 있고 3. 보리 종자는 품종과 수확시기에 따라 휴면성이 각각 다른 양상을 보여주고, 특히 두산 8호는 휴면성이 강하였다. 4. 고온저장(3$0^{\circ}C$)은 실온(2$0^{\circ}C$)에 비해 휴면성타파가 10-20일 촉진되어 고온하에서 후숙기간이 단축되었다. 5. 따라서 보리 종자의 휴면성은 품종, 수확시기, 저정온도, 저장기간에 따라 변이가 있고 발아율 향상을 위해 일정기간의 후숙기간이 필요하였다.

To investigate the effect of harvest time after heading, storage temperature and duration on the dormancy and germination in barley cultivars, the kernels were collected at 5 day intervals from 20 days after heading until 35 days. The kernels were dried at 2$0^{\circ}C$ for 7 days and storaged in freezing chamber (-15$^{\circ}C$). The kernels germinated better at 15$^{\circ}C$ than at $25^{\circ}C$, and 1% $H_2O$$_2$ and 3 ppm GA$_3$ treatments gave much higher germination percentage than non-treatment; $H_2O$$_2$ and GA$_3$ treatments were good for promoting germination of immature harvested kernels. Germination rate index were significantly correlated with germination percentage under $25^{\circ}C$ and 15$^{\circ}C$ temperature conditions. Hangmi, Jogangbori and Muanbori had deep or slight dormancy at the different harvesting time, especially Dusan #8 had the deepest dormancy. The dormancy broke more rapidly under 3$0^{\circ}C$ than 2$0^{\circ}C$ storage conditions, so high temperature accelerated dormancy breaking. Those results showed that dormancy was various with the cultivars, harvesting time, storage temperature and storage duration.

키워드