종이멀칭 이앙재배 시 유기물원에 따른 토양산화환원전위, 잡초방제 및 벼 생육특성 변화

Changes of Soil Redox Potential, Weed Control and Rice Growth in Paddy on Paper Mulching Transplanting by Organic Matter Application

  • 투고 : 2007.11.15
  • 심사 : 2007.12.06
  • 발행 : 2007.12.30

초록

본 시험은 벼 종이멀칭이앙 시 유기물원 및 유기물원과 완효성비료 조합 시 벼 생육, 잡초방제, 토양에 미치는 영향을 구명하고자 경기도 수원에 소재하는 작물과학원 벼시험포장 강서통에서 대안벼를 2004년 5월 28일에 중묘를 종이멀칭기계 이앙하였다. 시용한 유기물원은 퇴비, 볏짚 및 청예호밀을 투입하였다. 시용한 퇴비의 생중은 $10,000kg\;ha^{-1}$이고 C/N율은 17.5, 볏짚의 생중은 $10,000kg\;ha^{-1}$이고 C/N율은 44.2, 청예호밀은 생초중 $11,380kg\;ha^{-1}$이고 C/N율은 42.6이었다. 완효성 비료와 유기물원과 혼합 시 완효성비료의 시용량은 관행질소 시비량의 80%를 기준으로 하여 시용하였다. 완효성비료의 비종은 LCU (Latex Coated Urea, 21-7-9)복비를 시용하였다. 피복재료는 생분해성 폴리에스터 (PES $10{\mu}m$)+재생지를 이용하여 피복하였다. 유기물 시용 후 벼 종이멀칭이앙 시모의 결주율은 관행이앙과 큰 차이가 없었다. 잡초발생 및 방제가는 호밀이 투입된 구에서 잡초발생이 적었고 방제가도 높은 경향이었다. 주요시기별 토양의 산화환원전위는 볏짚+완효성 비료 80%구가 분얼기에 가장 낮았다. 볏짚과 퇴비 단용구는 유수형성기까지 산화환원전위가 감소하는 경향이었다. 주요시기별 토양 중 $NH_4{^+}-N$는 분얼기에는 청예호밀+완효성 80%구가 가장 높았고 퇴비시용구에서 유수형성기까지 용출이 되는 경향이었다. 벼 수량은 청예호밀+완효성 80%구와 퇴비+완효성 80%구가 관행과 통계적으로 차이가 없었다. 볏짚+완효성 80%구는 수량이 통계적으로 유의하게 감소하였다.

Recently we are interest in organic farming of rice. The technology of paper mulching was practised without herbicide in machine transplanting cultivation of paddy. A field experiment was conducted in Gangseo series (coarse loamy, mixed, nonacid, mesic family of Aquic Fluventic Eutrochrepts) at the National Institute of Crop Science (NICS), RDA, Suwon, Gyeonggi province, Republic of Korea in 2004. This experiment was carried out to evaluate soil redox potential, weed control and rice growth by the different organic matter in paper mulching transplanting. Compost, rice straw and soiling rye were incorporated as organic matter. The nitrogen amount of controlled-release fertilizer (CRF) plot was 80% compared with nitrogen amount ($110kg\;ha^{-1}$) of conventional fertilization. Mulching paper consisted of recycled paper which was coated with biodegradable plastics. There were no difference between conventional rice transplanting and paper mulching on missing hills after organic matter application. Weed control were the highest at added soiling rye plot. The redox potential of soil was the lowest in rice straw + CRF 80% plot at tillering stage. The $NH_4{^+}-N$ in soil was the highest at soiling rye + CRF 80% tillering stage. There was no difference in yield between soiling rye + CRF 80%, compost + CRF 80% and conventional fertilization plot.

키워드

참고문헌

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