Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Investigation of an Optimum Application Rate of Blended Biochar Pellet as Slow Release Fertilizer during Cabbage Cultivation

배추재배 시 바이오차 펠렛 완효성 비료의 적정 시용량 구명

  • Kim, HuiSeon (National Academy of Agricultural Science, Rural Development administration, Department of Bio-Environmental Chemistry, Wonkwang University) ;
  • Yun, SeokIn (Department of Bio-Environmental Chemistry, Wonkwang University) ;
  • Jang, Eunsuk (Department of Climate Change and Agro-ecology, National Institute of Agricultural Sciences) ;
  • Shin, JoungDu (Department of Climate Change and Agro-ecology, National Institute of Agricultural Sciences)
  • 김희선 (국립농업과학원 기후변화생태과 대학원, 원광대학교 생물환경화학과 대학원) ;
  • 윤석인 (원광대학교 생물환경화학과) ;
  • 장은숙 (국립농업과학원 기후변화생태과) ;
  • 신중두 (국립농업과학원 기후변화생태과)
  • Received : 2019.03.05
  • Accepted : 2019.03.21
  • Published : 2019.03.30
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Abstract

This experiment was conducted to select an optimum application rate of blended biochar pellet as slow release fertilizer during cabbage cultivation. The blended biochar pellet made with a combination(4:6) of biochar and pig manure compost with unloading N, P, K solutions for adjusting about 9% of total nitrogen(TN). The treatments were consisted of the control as recommended application rates for cabbage cultivation in National Institute of Agricultural Sciences, N 40%, N 40% and 0.07M MgO and N 60 % of the blended biochar pellet, respectively, based on nitrogen application of recommended rates to cabbage cultivation. Changes of $NH_4-N$, $NO_3-N$, $P_2O_5$ and $K_2O$ concentrations in the soil and growth characteristic and yield components were investigated and observed during the cabbage cultivation. The experimental result shown that contents of $NH_4-N$, $NO_3-N$ and $K_2O$ of soil in the N 40% were significantly difference(p<0.01) with the control. $P_2O_5$ concentrations of soil in the N 40% were highest among the treatments. The fresh weight per cabbage in the N 40% was not significantly different(p>0.05) from the control, but in the N 40% and 0.07M MgO and N 60% was lower than that of the control. It was considered that an optimum blended biochar application rate for cabbage cultivation was 40% of recommended nitrogen application.

본 연구의 목적은 배추재배 시 바이오차 펠렛 완효성 비료의 적정 시용량 구명을 위해 수행하였다. 바이오차 팰릿 완효성 비료는 돈분과 바이오차 혼합비(6 : 4)로 조제한 후 N : P : K 용액을 추가하여 총 질소 함량이 약 9%가 되도록 조제하였다. 본 시험의 처리는 대조구, 추천 질소 시비량의 바이오차 펠렛 완효성 비료 질소기준 40%(N 40%), 바이오차 펠렛 완효성 비료 질소기준 40% + 0.07M MgO(N 40% + 0.07M MgO)와 바이오차 펠렛 완효성 비료 질소기준 60%(N 60%) 시용구로 구성되어있다. 배추의 생육기간동안 토양 중 $NH_4-N$, $NO_3-N$, $P_2O_5$, $K_2O$의 농도 변화를 분석하였다. 실험 결과로서 토양중의 $NH_4-N$, $NO_3-N$, $K_2O$ 함량은 대조구와 비교하여 N 40%처리구가 유의차를 보였다. 토양 중의 $P_2O_5$농도는 바이오차 팰릿 완효성 비료의 처리구들 중 N 40%가 가장 높았다. 배추의 생체중은 N 40% 처리구는 대조구와 비교하여 유의적인 차이가 나지 않았으며(p>0.05), N 40% + 0.07M MgO 처리구와 N 60% 처리구는 대조구에 비해 감소하였다. 농경지에서 배추재배 시 추천 질소 시비량 기준의 N 40%가 적정 시용량이라 판단된다.

Keywords

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Fig. 1. Changes of NH4-N and NO3-N concentrations in the soil for the different treatments during cabbage cultivation. DAT; days after transplanting. Results are the mean of triplicates samples and error bars indicate standard deviation.

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Fig. 2. Changes of P2O5 concentrations in the soil for the different treatments during cabbage cultivation. DAT; days after transplanting. Results are the mean of triplicates samples and error bars indicate standard deviation.

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Fig. 3. Changes of K2O concentrations in the soil for the different treatments during cabbage cultivation. DAT; days after transplanting. Results are the mean of triplicates samples and error bars indicate standard deviation.

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Fig. 4. Comparsions of cabbage growth responses to different treatments.

Table 1. Chemical Properties of the Soil Before Experiment

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Table 2. Chemical Components of Biochar and Pig Manure Compost*

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Table 3. Cabbage Growth Responses to the Treatments

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