Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Midsummer Drainage Effects on Rice Growth and Golden Apple Snails in Environment-friendly Rice Cultivation

왕우렁이를 이용한 벼 친환경재배포장에서 벼와 왕우렁이 생장에 대한 중간낙수 효과

  • 황기철 (전북대학교 농업생명과학대학 작물생명과학과) ;
  • 안석현 (전북대학교 농업생명과학대학 작물생명과학과) ;
  • 정남진 (전북대학교 농업생명과학대학 작물생명과학과)
  • Received : 2013.07.15
  • Accepted : 2013.08.08
  • Published : 2013.09.30
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Abstract

This study was performed to examine whether it is possible to promote rice growth by midsummer drainage without damage of golden apple snails in environment-friendly rice farming. The effect of drainage on the life of snails was examined in a greenhouse before the filed experiment. Spats (young shells) of snails survived 100% at 12 days after drainage, and 93.3% at 15 days after drainage. The midsized shells survived 100% at 9 days, 93.3% at 12 days, and 86.6% at 15 days after drainage. In the field experiment, 10-days drainage did not affect the snail population and there was no significant difference of weeding activity of snails between the midsummer drainage treatment and the continuous submerged treatment. The plant height and the effective tiller number in the midsummer drainage treatment were higher than those of the continuous submerged treatment. The rice yield of midsummer drainage plot was 511kg/10a, which was 66kg/10a higher than 445kg/10a of continuous submerged plot. In conclusion, midsummer drainage could increase rice growth and yield without damage of golden apple snails in the environment-friendly rice farming.

본 연구에서는 왕우렁이를 이용한 벼 친환경 재배시 왕우렁이에 피해가 되지 않으면서 중간낙수에 의하여 벼 생육을 촉진하는 것이 가능한지 검토하고자 수행하였다. 낙수기간에 따른 토양수분함량과 왕우렁이의 생존율을 온실에서 포트실험을 통하여 조사한 결과, 토양 수분함량은 낙수 후 6일에 39.1%, 9일에 31.9%, 12일에 26.8%, 15일에 21.8%로 감소되었고, 왕우렁이는 치패의 경우 낙수 처리 후 12일까지, 중패는 낙수 처리 후 9일까지 100%의 생존율을 보였고, 낙수 후 15일에는 치패는 93.3%, 중패는 83.3%의 생존율을 보였다. 잡초발생량은 상시담수구와 중간낙수구간에 차이가 없었으며, 중간낙수에 의하여 주당 수수가 증가하여 중간낙수구의 쌀 수량은 511kg/10a로 상시담수구의 쌀수량 445kg/10a보다 66kg/10a 증가한 결과를 보였다.

Keywords

References

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