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Management of Recycled Nutrient Resources using Livestock Waste in Large-Scale Environment-Friendly Agricultural Complex

광역친환경농업단지의 경축순환자원 양분관리

  • Received : 2012.02.07
  • Accepted : 2012.03.09
  • Published : 2012.04.30

Abstract

This experiment was carried out to investigate soil properties and the requirement of livestock manure compost in a large-scale environment-friendly agricultural complex (EFAC), Gosan, Wanju-gun, Jeonbuk. Total cultivation area of major crops was 2,353 ha. This complex area included different types of environment-friendly cropping sections (402.9ha) and livestock farming including 21,077 Korean beef cattle, 1,099 dairy cow, and 32,993 hog. Amount of livestock waste carried in to Resource Center for Crop and Livestock Farming (RCCLF) was 32 Mg per day and the production of manure compost was 9,600 Mg per year. The manure contained 1.4% total nitrogen (T-N), 2.7% phosphorus as $P_2O_5$, 2.1% potassium as $K_2O$, 0.9% magnesium as MgO, 2.5% calcium as CaO. Amount of compost used in the EFAC was 6,588 Mg per year. Soil pH values in the EFAC were varied as follows: 78.1% of paddy field soil, 58.2% of upland soil, 60.3% of orchard field soil, and 62.1% of greenhouse soil were in proper range. For the content of soil organic matter, 41.7% of paddy field soil, 46.5% of upland soil, 40.5% of orchard field soil, and 81.4% of greenhouse soil were higher than proper range. The content of available phosphorus was mostly higher than proper value on the different fields except upland soil. The contents of exchangeable $K^+$, $Ca^{2+}$, and $Mg^{2+}$ were also exceeded in the orchard field and greenhouse soils. In addition, microbial population, especially aerobic bacteria, in the EFAC was higher than that in regular farming land.

광역친환경농업단지의 경축순환자원 활용실태를 파악하기 위해 전북 완주군 고산광역친환경농업단지의 토양특성과 축분퇴비 소요량 등을 조사하였다. 주요작물 재배면적은 2,353 ha (벼 1,398 ha, 감 189 ha 등)이며 이 가운데 친환경 참여면적은 402.9 ha이고, 주요 축종사육은 한우 21,077, 젖소 1,099, 돼지 32,993마리 등 총 58,955 마리이었다. 경축자원화센터에 유입되는 분뇨는 한우, 돼지 각각 6,000 마리, 닭 200,000 마리 참여로 일일 32 Mg이고, 퇴비생산량은 연간 9,600톤이며, 비료성분은 T-N 1.4%, $P_2O_5$ 2.7%, $K_2O$ 2.1%, MgO 0.9%, CaO 2.5% 이었다. 친환경농업단지 내에서 소모되는 퇴비량은 6,588 Mg이었다. 친환경농업단지의 토양화학성분은 논의 경우 pH는 78.1%, 밭 58.2%, 과수원 60.3%, 비가림시설 재배지 62.1%가 적정범위였다. 유기물은 논의 경우 41.7%, 밭 46.5%, 과수원 40.5%, 비가림시설재배지 81.4%가 과잉으로 나타났다. 유효인산은 밭토양을 제외하고 64.9~91.7%가 과잉으로 나타났으며, 치환성 $K^+$, $Ca^{2+}$, $Mg^{2+}$은 과수원과 비가림시설재배지에서 53.2~70.2%가 과잉인 것으로 나타났다. 비가림시설 재배지의 토양화학성은 2년차 이후에 증가폭이 컸으며, 모든 농경지의 중금속 함량은 토양오염우려기준을 초과한 경우는 없었다. 친환경농업단지의 미생물분포는 일반농경지 보다 높았고, 호기성균의 경우 친환경농업단지의 밭과 과수원토양에서 가장 높았다.

Keywords

References

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