Nitrogen Losses During Animal Manure Management : A review

가축분뇨관리 과정 중 손실되는 질소 : A review

  • Choi, Dong-Yoon (National Institute of Animal Science, R.D.A.) ;
  • Song, Jun-Ik (National Institute of Animal Science, R.D.A.) ;
  • Park, Kyu-Hyun (National Institute of Animal Science, R.D.A.) ;
  • Khan, Modabber A. (National Institute of Animal Science, R.D.A.) ;
  • Ahn, Heekwon (Dept. of Animal Biosystem Science, Chungnam National University)
  • 최동윤 (농촌진흥청 국립축산과학원) ;
  • 송준익 (농촌진흥청 국립축산과학원) ;
  • 박규현 (농촌진흥청 국립축산과학원) ;
  • ;
  • 안희권 (충남대학교 동물바이오시스템과학과)
  • Received : 2012.11.16
  • Accepted : 2012.12.05
  • Published : 2012.12.30

Abstract

Nitrogen included in animal manure can be used as organic fertilizer if it is treated properly but it may cause serious air and water pollution without proper management. Significant amount of nitrogen losses happen in the form of ammonia when the manure staying in animal house and storage facilities and being composted and applied to the field. In order to maximize the manure nitrogen utilization, it is important to understand the mechanisms of nitrogen loss during the diverse manure handling and treatment procedures. The plant available nitrogen portion of total nitrogen in excreted manure was evaluated based on animal type, animal manure collection system, manure treatment process, and application method. About 27% of nitrogen included in excreted pig manure could be plant available if it is applied to the filed after composting process. The plant available nitrogen portion varies from 29% (surface application) to 54% (solid injection) based on application method of digestated piggery slurry. Plant can use 18% of manure nitrogen if the composted cattle and poultry manure applied to the field using surface application method. Manure treatment and application methods need to be carefully selected to control and utilize the manure nitrogen properly.

가축분뇨 중의 질소성분이 불필요하게 대기중으로 휘산되어 환경오염을 일으키거나 가축분뇨의 비료 가치를 저하시키는 것을 줄여주기 위해서는 가축분뇨 처리단계 별 질소손실 기작 및 조건을 올바르게 이해할 필요가 있다. 각 축종별 우리나라의 전형적인 축사시설 및 가축분뇨 처리형태를 기준으로 가축분뇨에 함유된 질소가 토양에 살포되어 작물에 의해 이용될 수 있는 비율을 산정한 결과는 다음과 같다. 1. 슬러리 형태로 수거한 돈분뇨를 퇴비화 한 후 토양에 표면살포했을 경우 시비 후 2년 이 경과한 시점에서 작물이 이용 가능한 질소 성분은 배설된 분뇨에 함유된 총질소 성분의 27% 수준이다. 2. 슬러리 형태로 수거한 돈분뇨를 혐기소화 한 후 토양 표면에 살포한 상태에서 2년 후에 작물이 이용 가능한 질소는 분뇨중 총 질소의 29%이며, 혐기소화 한 소화폐액을 토양주입(Injection)에 의해 살포할 경우 분뇨중 총질소의 54%가 2년 후 작물에 의해 이용 가능하다. 이러한 결과는 토양주입이 가축분뇨 토양살포 시 휘산되는 암모니아를 저감시키는데 매우 효율이 높음을 입증하는 좋은 예라고 볼 수 있다. 3. 깔짚우사에서 수거한 한우 및 젖소 분뇨를 퇴비화한 후 토양 살포를 할 경우 3년이 경과한 시점에 작물이 이용 가능한 질소는 분뇨 중 총질소의 18% 수준이다. 4. 계분을 퇴비화한 후 토양 살포를 할 경우 2년이 경과한 시점에 작물이 이용 가능한 질소는 분뇨 중 총질소의 18% 수준으로 계산되었다.

Keywords

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