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Effect of Growth and Nitrogen Use Efficiency to Chinese Cabbage under Fermented Organic Fertilizer Treatment with Domestic Resource

국내 자원으로 제조한 발효 유기질비료가 배추의 생육 및 질소이용효율에 미치는 영향

  • You-Jin Kim (Organic Agriculture Division, National Institute of Agricultural Science) ;
  • So-Hui Kim (Organic Agriculture Division, National Institute of Agricultural Science) ;
  • Sang-Min Lee (Organic Agriculture Division, National Institute of Agricultural Science) ;
  • Cho-Rong Lee (Organic Agriculture Division, National Institute of Agricultural Science)
  • 김유진 (국립농업과학원 농업환경부 유기농업과 ) ;
  • 김소희 (국립농업과학원 농업환경부 유기농업과 ) ;
  • 이상민 (국립농업과학원 농업환경부 유기농업과 ) ;
  • 이초롱 (국립농업과학원 농업환경부 유기농업과)
  • Received : 2023.07.17
  • Accepted : 2023.09.18
  • Published : 2023.09.30

Abstract

This study investigate growth responses of Chinese cabbage and nitrogen use efficiency (NUE) to application of fermented organic fertilizer produced from domestic organic resources for developing alternative materials instead of imported castor oil meal. Two types of fermented fertilizers (Fermented Organic Fertilizer A (OFA) and Fermented Organic Fertilizer B (OFB)) were produced by mixing distillers dried grains 30%, sesame cake 30%, rice bran 20% and fish meal 20% under different fermentation conditions. Treatment consisted of OFA is fermented for 21 days on plastic greenhouse, OFB is fermented for 5 days on 40℃, and MOF (Mixed Organic Fertilizer) is a fertilizer made with castor bean as the main ingredient. OFA, OFB and MOF were applied at the rate of 320 kg N/ha. Chinese cabbages were cultivated from Aug. to Nov. in 2022. Growth and yield of Chinese cabbage were no significant differences among all treatments except control (non-fertilized, NF). However, NUE of Chinese cabbage was higher the fermented fertilizer treatment (OFB: 81.4%, OFA: 79.1%) than the MOF (65.3%). It was observed that urease activity in the fermented fertilizer treatment was significantly higher than the MOF. This result confirmed that fermented fertilizers have similar effect on growth and yield with the MOF and could improve the NUE of crop.

본 연구는 수입산 아주까리박을 주원료로 하는 혼합유기질비료(혼합유박)을 대체하기 위해 국내 유기자원을 원료로 제조한 발효비료의 처리효과를 확인하는 목적으로 수행되었다. 발효비료는 주정박(30%), 깻묵(30%), 미강(20%), 어분(20%)을 혼합하여 제조하였다. 이때 발효조건을 달리하여 기존 발효방식(비가림 하우스에 21일간 발효)으로 제조한 발효비료A (Fermented Organic fertilizer A. OFA)와 발효기간을 단축(40℃에서 5일간 발효)시켜 제조한 발효비료B (Fermented Organic fertilizer B, OFB) 2종을 제조하였다. 본 실험의 처리구는 무처리(Control, NF), 혼합유박(Mixed organic fertilizer, MOF), 발효비료 처리구(OFA, OFB)로 설정하였으며, 노지 배추 표준시비량의 질소 기준(320 kg/ha)으로 자재를 처리하였다. 재배시험 결과 OFA, OFB와 MOF간의 배추의 생육과 수량이 유의적인 차이를 보이지 않았다. 배추의 질소이용효율은 발효비료 처리구(OFB : 81.4%, OFA : 79.1%)가 MOF (65.3%)보다 증가하였고, 발효비료를 처리한 토양의 Urease 활성도가 240~241 ㎍/g/dm/2h로 MOF (203 ㎍/g/dm/2h)와 통계적으로 유의한 차이를 보였다. 결론적으로, 국내 유기자원으로 제조한 발효비료 2종은 혼합유박과 유사한 생육과 수량을 보였으며, 발효과정으로 작물의 양분흡수가 용이해져 질소이용효율을 개선시키는데 도움을 준 것으로 판단된다. 이에 제조한 발효비료가 양분공급자재로 혼합유박을 대체 하는데 효과적일 것으로 보인다. 특히, 발효기간을 기존대비 16일 단축시켜 제조한 OFB도 기존 발효비료(OFA)와 효과가 유사하여 현장 활용도가 높을 것으로 판단된다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 국립농업과학원 농업과학기반기술연구(과제번호: PJ01599001)의 지원에 의해 이루어진 것임.

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