유기물자원화 (Journal of the Korea Organic Resources Recycling Association)

  • 제30권4호
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  • Pages.151-163
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  • 2022
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  • 1225-6498(pISSN)
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  • 2508-3015(eISSN)
유기성자원학회 (Korea Organic Resources Recycling Association)
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옥수수 밭에서 유기질 비료가 토양 비옥도 및 토양 호흡에 미치는 영향

Impacts of Different Organic Fertilizers on Soil Fertility and Soil Respiration for a Corn (Zea mays L.) Cropping System

  • Mavis, Brempong Badu (Legumes and Oil Seeds Division, Crops Research Institute) ;
  • Hwang, Hyun Young (Organic Agriculture Division, National Institute of Agricultural Sciences) ;
  • Lee, Sang Min (Organic Agriculture Division, National Institute of Agricultural Sciences) ;
  • Lee, Cho Rong (Organic Agriculture Division, National Institute of Agricultural Sciences) ;
  • An, Nan Hee (Organic Agriculture Division, National Institute of Agricultural Sciences)
  • 투고 : 2022.11.14
  • 심사 : 2022.12.19
  • 발행 : 2022.12.30
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초록

본 연구는 친환경 농산물 생산을 위한 양분관리 자재로 유기질비료 처리에 따른 옥수수 재배 토양의 비옥도 및 토양 호흡에 미치는 영향을 분석하였다. 시험장소는 국립농업과학원 유기농업과 시험포장에서 수행하였으며 처리구는 퇴비 (Com), 발효비료 (FOF), 혼합 유박 (PC), 무비구 (NF)로 처리구당 3반복 완전임의 배치하였다. 처리량은 174kg N/ha로 옥수수 표준시비량의 질소기준에 준하여 처리하였다. 옥수수 정식 8주 후 토양분석 결과, 퇴비는 토양의 탄소 (C)와 질소 (N)를 각각 7.48 및 0.76g/kg으로 증가시켰고, 다른 처리구는 시험 전과 차이가 없었다. 또한 시험 후 토양의 화학적 특성은 무비구를 제외하고 유의한 차이는 없었다. 토양 CO2 발생량은 발효비료 처리가 다른 처리구보다 31-76% 증가시켰으며 두 번의 제초작업 후 CH4 발생량의 차이는 없었다. 토양의 N2O 배출량은 발효비료 처리가 다른 처리구보다 87-96% 감소되었다. 미생물 밀도 조사 결과, 시험 전에 비해 시험 후 토양의 사상균 및 방선균 밀도를 각각 25%, 16% 증가되었다. 따라서 친환경 농산물 생산을 위한 발효비료 등 유기질 비료는 자원을 순환하며 토양 생산성을 유지하는데 기여할 것이다.

This study was conducted to promote organic fertilizer(s) that sustain soil productivity for corn production and protect the environment as required by the Act on the promotion of eco-friendly agriculture. It was conducted at the research station of the Organic Agriculture Division of the National Institute of Agricultural. The treatments consisted of Compost (Com), Bokashi as fermented organic fertilizer (FOF), and mixed expeller pressed cake (PC). They were applied at 174 kg N /ha to field corn, together with a 'no fertilizer' check in Randomized Complete Block Design. At eight weeks after transplanting (WAT) corn, compost increased soil carbon (C) and nitrogen (N) to 7.48 and 0.76 g/kg respectively, while other fertilizers maintained the initial levels (before treatment application). At corn harvest (13 WAT), soil chemical properties (total C, total N, pH, electrical conductivity, P2O5, Ca, K, and Mg) were similar among all organic fertilizer treatments. For soil respiration, FOF increased soil CO2 respiration by 31-76% above other fertilizer treatments. However, there were no prominent changes in the trends of CH4 fluxes following the two mechanical weeding operations. Fermented organic fertilizer affected N2O emissions between 87-96% lower than other fertilizer treatments. Compared to the initial microbial densities, FOF increased fungi and actinomycete colony foming unit by 25 and 16% at harvest. Therefore, the additional potential of improving soil biological fertility and local availability of raw materials make FOF a better option to sustain soil productivity while protecting the environment.

키워드

과제정보

This project was supported by Korea-Africa Food and Agriculture Cooperation Initiative (KAFACI) and the Organic Agriculture Division of National Institute of Agricultural Science, Rural Development Administration, under the project number, PJ015990012022.

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