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Evaluation of Ammonia Emission Following Application Techniques of Pig Manure Compost in Upland Soil

밭 토양에서 돈분 퇴비 시용방법에 따른 암모니아 휘산량 평가

  • 윤홍배 (농촌진흥청 국립농업과학원) ;
  • 이연 (농촌진흥청 국립농업과학원) ;
  • 이상인 (농촌진흥청 국립농업과학원) ;
  • 김석철 (농촌진흥청 국립농업과학원) ;
  • 이용복 (농촌진흥청 국립농업과학원)
  • Published : 2009.03.31

Abstract

Ammonia in atmosphere has a negative effect on the natural ecosystems, such as soil acidification and eutrophication, by wet and dry deposition. Livestock manure, compost, and fertilizer applications to arable land have been recognised as a major source of atmospheric ammonia emissions. The objective of this study was to evaluate the efficiency of compost application techniques in reducing ammonia loss in upland soil. The reductions in ammonia emission were 70 and 15% for immediate rotary after application (IRA) and rotary at 3 day after application (RA-3d) in comparison with surface application (SA). Total ammonia emissions for 13 days, expressed as % ammonia-N applied with compost, were 42, 35.7, and 12.7% for SA, RA-3d, and IRA treatments, respectively. The ammonia emission rate fell rapidly 6 h after application and 61 % of total ammonia emission occurred within the first 24 h following surface application. The lime application along with compost significantly enhanced the total ammonia emission. Total ammonia emission for 22 days were 40.1, 31.4, and 27.7 kg/ha for immediate incorporation in soil after lime and compost application, lime incorporation in soil following 3 days after compost surface application, and compost incorporation in soil following 3 days after lime surface application, respectively. Therefore, lime and livestock manure compost application at the same time was not recommended for abatement of ammonia emission in upland soil.

대기중으로 휘산되는 대부분의 암모니아는 농경지에서 시용하는 가축분뇨 퇴비와 질소비료에서 유래한다. 본 연구는 밭 토양에서 돈분 퇴비 시용방법에 따른 암모니아 휘산량을 소형원드터널 방법을 이용해서 정량적으로 평가하였다. 돈분 퇴비(20 Mg/ha) 표층살포(SA), 표층살포 후 즉시 경운(IRA), 표층 살포 3일 후 경운(RA-3d) 처리의 13일 동안 암모니아 휘산량은 각각 28.7, 8.7, 24.3 kg N/ha로 IRA 처리구는 SA 처리구에 비해 70% 저감효과를 가져왔다. 그리고 SA 처리구의 퇴비 처리 후 24시간 이내 휘산된 암모니아 양은 총 휘산량의 61%로 대부분의 암모니아는 시용 초기 짧은 시간 내에 휘산됨을 알 수 있었다. 석회와 퇴비 혼용시용 후 교반(L+C mix), 퇴비표층 살포 3일후 석회시용 교반(C+L3D), 석회시용 3일 후 퇴비시용 교반(L+C3D) 처리구의 22일 동안 총 암모니아 휘산량은 각각 40.1, 31.4, 27.7 kg/ha이었다. 따라서 가축분 퇴비 시용시 석회를 혼용하는 것은 피해야 하며, 만일 동일 작기내 시용이 불가피할 경우는 퇴비시용에 앞서 석회를 먼저 충분한 일수를 앞두고 시용하는 것이 암모니아 휘산량을 저감시킬 수 있다는 결론을 얻었다.

Keywords

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