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분해성 피복자재의 멀칭처리가 벼 생육 및 지렁이 생태에 미치는 영향

Effect of Mulching with Easily-Decomposable Organic Materials on the Rice Growth and Earthworm Ecology Characteristics in Paddy Fields

  • 남홍식 (농촌진흥청 국립농업과학원) ;
  • 이상범 (농촌진흥청 국립농업과학원) ;
  • 박광래 (농촌진흥청 국립농업과학원) ;
  • 홍승길 (농촌진흥청 국립농업과학원) ;
  • 강충길 (농촌진흥청 국립농업과학원) ;
  • 손진관 (농촌진흥청 국립농업과학원) ;
  • 김석철 (농촌진흥청 국립농업과학원)
  • Nam, Hong-Shik (National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Sang-Beom (National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Kwang-Lai (National Academy of Agricultural Science, Rural Development Administration) ;
  • Hong, Seung-Gil (National Academy of Agricultural Science, Rural Development Administration) ;
  • Kang, Chung-Kil (National Academy of Agricultural Science, Rural Development Administration) ;
  • Son, Jin-Kwan (National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Seok-Cheol (National Academy of Agricultural Science, Rural Development Administration)
  • 투고 : 2014.11.17
  • 심사 : 2014.12.25
  • 발행 : 2014.12.30

초록

본 연구는 벼 재배에서 유기물함유 피복자재의 멀칭처리가 벼 생육 및 수량과 논 환경에 미치는 영향을 구명하기 위해 수행하였다. 피복 자재의 원료 및 색상에 따라 쌀함유, 전분함유(투명색과 검정색), 광물질함유, 일반 비닐의 멀칭 처리구와 무피복(관행 및 유기재배) 대조구를 설정하였다. 처리구에 따라 벼의 생육과 수량이 상이하였는데, 벼의 수량은 쌀함유 피복($6.51ton\;ha^{-1}$)과 일반 비닐($6.47ton\;ha^{-1}$)이 가장 높았고, 전분함유 투명 피복($6.25ton\;ha^{-1}$)와 광물질 함유 피복($6.20ton\;ha^{-1}$)이 관행 제초구($6.15ton\;ha^{-1}$)과 유사하였으며, 전분함유 검정 피복($4.93ton\;ha^{-1}$)은 관행 제초구 보다 낮았다. 벼 재배 기간 중 토양의 평균 온도는 $23.6{\sim}24.1^{\circ}C$로 쌀함유 피복에서 가장 높았으며, 토양의 누적온도 역시 쌀함유 피복에서 다른 처리보다 높았다. 토양 이화학성 중 전기전도도, 유기물 함량, 인산 함량 등도 처리간 차이가 있었다. 쌀함유 피복구에서 지렁이에 의한 분변토 생성량($17.7kg\;m^{-2}$)이 다른 처리구($5.5{\sim}9.8kg\;m^{-2}$) 보다 많은 특성을 보였다. 따라서, 벼 수량과 논 토양의 지렁이 활동 측면에서 쌀함유 피복의 효과가 가장 큰 것으로 판단되었다.

This study was conducted to investigate the effects of mulching of easily-decomposable organic materials including rice powder and corn starch on rice paddy fields. The treatments were including seven mulching materials each consisted of rice powder [Rice], starch with black color [Starch-B] and transparent [Starch-T] and stone powder [Stone], and conventional vinyl [Conventional], no-mulching without herbicide [Control-O] and no-mulching with herbicide [Control-C]. Rice growth and yield were different among the treatments; the highest yields were observed for [Rice] ($6.51ton\;ha^{-1}$) and [Conventional] ($6.47ton\;ha^{-1}$) followed by [Starch-T] ($6.25ton\;ha^{-1}$) and [Stone] ($6.20ton\;ha^{-1}$) which is comparable to the [Control-C] ($6.15ton\;ha^{-1}$). However, [Starch-B] showed lower rice yield ($4.93ton\;ha^{-1}$) than the [Conventional] or [Control-C]. Mean soil temperature ranged form 23.6 to $24.1^{\circ}C$ with the highest temperature for [Rice] treatment, and cumulative soil temperature was also significantly higher in the [Rice] treatment. Among the soil parameters, electrical conductivity, organic matter content, and phosphorus concentration were also different among the treatments. The amount of earthworm casting was higher for [Rice] treatment ($17.7kg\;m^{-2}$) compared to the others ($5.5{\sim}9.8kg\;m^{-2}$). It was suggested that mulching of rice fields with organic materials containing rice powder is better than others in respected to rice yield and earthworm activity.

키워드

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