Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Fertilizer Effect of Waste Nutrient Solution in Greenhouses for Young Radish Cultivation

열무 재배를 위한 시설하우스 폐양액의 비료 효과

  • Hong, Youngsin (Division of Agricultural Engineering, National Institute of Agricultural Sciences, RDA) ;
  • Moon, Jongpil (Division of Agricultural Engineering, National Institute of Agricultural Sciences, RDA) ;
  • Park, Minjung (Division of Agricultural Engineering, National Institute of Agricultural Sciences, RDA) ;
  • Son, Jinkwan (Division of Agricultural Engineering, National Institute of Agricultural Sciences, RDA) ;
  • Yun, Sungwook (Division of Agricultural Engineering, National Institute of Agricultural Sciences, RDA)
  • 홍영신 (국립농업과학원 농업공학부) ;
  • 문종필 (국립농업과학원 농업공학부) ;
  • 박민정 (국립농업과학원 농업공학부) ;
  • 손진관 (국립농업과학원 농업공학부) ;
  • 윤성욱 (국립농업과학원 농업공학부)
  • Received : 2022.09.27
  • Accepted : 2022.10.24
  • Published : 2022.10.31
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Abstract

The purpose of this study is to enhance utilization of the waste nutrient solution (WNS) disposed at the hydroponic greenhouse. Several sets of testing were conducted to examine the effects of WNS: (a) a fertilizer effect, (b) soil column leaching, and (c) crop cultivation. The fertilizer effect test was applied in young radish cultivation by examining the growth characteristics of young radish and soil based on inorganic nitrogen according to the soil treatment of the nitrogen fertilizer (NF) and the WNS. The fertilizer effects and crop cultivation test were conducted with five treatments (A-E): A, non-treatment (water); B, 100% of NF; C, 70% of NF + 30% of WNS; D, 50% of NF + 50% of WNS; and E, 30% of NF + 70% of WNS. The soil column leaching test was conducted with three treatments: non-treatment (water), 100% of NF, 50% of WNS + 50% of NF. As a result, the chemical properties of the WNS were pH 6.0, EC 2.4dS·m-1, total phosphorus (T-P) 28mg·L-1, ammonium nitrogen (NH4-N) 5.0mg·L-1, and nitrate nitrogen (NO3-N) 301mg·L-1. The chemical properties of the soil were pH 5.51, EC 0.31dS/m, organic matter 2.08g·kg-1, NO3-N 9.64mg·kg-1, and NH4-N 3.20mg·kg-1. The results of fertilizer effects showed that the ratio of 50% or less of NF and 50% or more of WNS was high in young radish growth. There was no statistically significant difference between the soil chemistry in the C-E treatments where WNS was mixed with NF and the B treatment where only NF was applied. As a result of the soil column leaching test, there was no significant difference in the concentrations of NO3 and NH4 in the treatment of 100% of NF and 50% of NF + 50% of WNS. The study indicates, if the mixed fertilizer of WNS and NF is applied in the soil cultivation of young radish, it will reduce the use of NF and environmental pollution. This also helps reduce production costs on farmers and increase the yield of young radish.

본 연구에서는 양액재배 시 발생되는 폐양액의 적절한 농업적 이용방안을 강구하기 위해 폐양액의 비료 효과시험, 토양컬럼 시험, 그리고 작물 재배시험을 수행하였다. 폐양액의 비료 효과시험은 무기질소를 기준으로 질소비료와 폐양액의 토양 처리에 따른 열무의 생육특성과 토양의 화학적 특성을 조사하였다. 폐양액 비료 효과시험과 작물 재배시험을 위한 토양에 대한 폐양액의 처리는 무처리; A, 질소비료 100%; B, 질소비료 70%+폐양액 30%; C, 질소비료 50%+폐양액 50%; D, 질소비료 30%+폐양액 70%; E 총 5개 처리구로 하였다. 토양컬럼 시험을 위한 토양에 대한 폐양액의 처리는 무처리, 질소비료 100%, 폐양액 50%+질소비료 50% 3개 처리구로 하였다. 폐양액의 화학성은 pH 6.0, EC 2.4dS·m-1, 총인(T-P) 28mg·L-1, 암모늄태 질소(NH4-N) 5.0mg·L-1, 질산태 질소(NO3-N) 301mg·L-1로 나타났다. 토양의 화학성은 pH 5.51, EC 0.31dS·m-1, 유기물 2.08g·kg-1, 질산태 질소 9.64mg·kg-1, 암모늄태 질소 3.20mg·kg-1으로 나타났다. 질소비료 50% 이하와 폐양액 50% 이상의 비율이 열무 생육에 효과가 높은 것으로 나타났다. 폐양액을 질소비료와 함께 혼합하여 적용한 C-E 처리구에서 토양의 이화학성은 질소비료만을 적용한 B 처리구와 통계적으로 유의한 차이가 없었다. 토양컬럼 시험 결과 질소비료 100%와 폐양액 50%+질산비료 50% 처리구의 NO3와 NH4의 농도는 큰차이가 없는 것으로 나타났다. 폐양액을 화학비료의 표준시비량을 기준으로 이용하여 토양에 처리하면 토양 내 질소 성분의 이동과 주변의 영향은 일반 화학비료와 유사하게 나타나는 것으로 판단된다. 열무 토경재배에 폐양액과 질소비료를 혼합하여 사용하면 폐양액의 재이용으로 환경적 부담도 줄일 수 있고, 질소비료의 사용량도 줄일 수 있어 농가에 경제적 부담 감소와 열무 생산량 증대 효과도 기대할 수 있다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 연구사업(과제번호:PJ014190022021)의 지원에 의해 이루어진 것임.

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