Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Minimizing Nutrient Loading from SCB Treated Paddy Rice Fields through Water Management

SCB 액비 시용 논에서 물관리를 통한 양분의 수계 부하 최소화 방안

  • Kim, Min-Kyeong (Climate Change and Agroecology Division, National Academy of Agricultural Science, RDA) ;
  • Kwon, Soon-Ik (Climate Change and Agroecology Division, National Academy of Agricultural Science, RDA) ;
  • Kang, Seong-Soo (Soil and Fertilizer Division, National Academy of Agricultural Science, RDA) ;
  • Jung, Goo-Bok (Climate Change and Agroecology Division, National Academy of Agricultural Science, RDA) ;
  • Hong, Seung-Chang (Climate Change and Agroecology Division, National Academy of Agricultural Science, RDA) ;
  • Chae, Mi-Jin (Climate Change and Agroecology Division, National Academy of Agricultural Science, RDA) ;
  • So, Kyu-Ho (Climate Change and Agroecology Division, National Academy of Agricultural Science, RDA)
  • 김민경 (국립농업과학원 기후변화생태과) ;
  • 권순익 (국립농업과학원 기후변화생태과) ;
  • 강성수 (국립농업과학원 토양비료과) ;
  • 정구복 (국립농업과학원 기후변화생태과) ;
  • 홍성창 (국립농업과학원 기후변화생태과) ;
  • 채미진 (국립농업과학원 기후변화생태과) ;
  • 소규호 (국립농업과학원 기후변화생태과)
  • Received : 2012.07.26
  • Accepted : 2012.10.09
  • Published : 2012.10.30
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Abstract

This study was conducted to establish the BMPs (Best Management Practices) for preventing pollutant loadings from paddy rice field applied livestock liquid manure from 2008 through 2011. Cultivated paddy rice fields (Gyeonggi province, Korea) were treated with SCB (Slurry composting and bio-filtration process) liquid fertilizer. The BMPs for paddy rice field developed in this study includes: 1) the controlling a drainage water gate in paddy rice field from right after SCB liquid fertilizer application to 3 weeks after rice transplanting; 2) livestock liquid fertilizer application to paddy rice soils in 20 days before rice transplanting to encourage the utilization of liquid fertilizer; 3) preservation of surface water depth to 5 cm in a paddy field right after SCB liquid fertilizer applied to minimize a water pollution and enhance the utilization of liquid fertilizer; and 4) blocking a water gate at least for 2 days to inactivate E. coli survival. The findings of this study will provide useful and practical guideline to applicators of agricultural soil in deciding appropriate handling and time frames for preventing pollution of water quality for sustainable agriculture.

본 연구는 2008년부터 2010년까지 경기도 여주군 능서면 오계2리 SCB 액비를 시용한 논에서 수질환경 부하 저감을 위한 물관리 방안을 제시하고자 시험을 수행하였다. 첫째, 액비가 시용된 경지정리된 논에서는 시용 직후부터 이앙 후 3주까지 물 흘러대기를 금지하여 시용된 양분의 환경부하를 최소화하면서 시비효율을 높이는 방안, 둘째, 액비를 최소 이앙 20일 전에 시비하여 토양 중 양분 보유 능력을 높여 작물의 양분 이용효율을 높이는 방안, 셋째, 액비 살포 후 바로 경운시 담수심을 5 cm내외로 유지하여 환경부하 저감 및 용수절감 효과를 높이는 방안, 넷째, 액비 중에 포함되어 있는 분변성 대장균은 논에 시용 후 48시간 후부터 소멸되기 시작하므로 최소 2일 동안 물꼬를 막아 논 표면수의 유출을 억제하여 대장균에 의한 인근 하천 수계 오염을 저감하는 방안이 있다. 그러나, 본 연구에서는 SCB 액비를 시용하는 평탄지 논에서 수행한 연구결과로 물관리 패턴이 다른 곡간지 논에서는 한계점이 있을 것으로 생각되나 액비를 시용하는 논은 대부분 시용이 용이한 경지정리된 평탄지 논으로 본 연구결과들은 외부 수질환경 부하를 방지하기 위한 영농지도 자료로 활용될 수 있을 것으로 생각된다.

Keywords

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