토마토 재배를 위한 바이오차 최적시용 비율 평가 = Assessment of an Optimum Biochar Application Rate for Tomato( Solanum lycopersicum L.) Cultivation

국문 초록 (Abstract)

본 연구의 목적은 원예작물을 대상으로 밭에서 바이오차 시용에 따른 토마토 재배 시 바이오차의 적정 시용비율을 구명하고, 탄소 격리량을 산정하는 것이다. 바이오차는 0.01%, 0.03%, 0.05% 및 0.07%(w/w, 토양/바이오차)로 구분하여 처리하였으며, 비료는 N-P-K, 20.4-10.3-12.2 kg 10a -1 를 기비와 추비로 나누어 시용하였고, 돈분퇴비는 440 kg 10a -1 를 기준으로 전량 기비로 투입하였다. 토양 이화학성의 결과를 보면 토양중의 NO 3 -N 함량은 바이오차 처리 9일 후 가장 높게 나타났지만 처리간 유의성은 없었지만(p>0.05) NH 4 -N 함량은 바이오차 처리 후 14일 후바이오차 처리구에서 낮게 나타났다. 토양중의 P 2 O 5 함량은 바이오차 처리 후 19일 후 0.01%를 제외한 바이오차 처리구에서 낮게 나타났다. 토양 중 K 2 O 함량은 바이오차 처리 후 6일 때 대조구와 비교하였을 때 0.01%와 0.03%가 높게 났다. 하지만 다른 처리구와 비교 하였을 때 유의차가 인정되지 않았다. 질소 효율성을 보면 0.05%에서 가장 높았으며, 또한 토마토 생육도 바이오차 처리량에 관계없이 좋았다. 바이오차 0.05% 시용구에서 질소 효율성 및토마토 생육과 수량이 가장 높게 나타났다. 바이오차 투입량 변화에 따른 탄소 격리량 산정에서는 0.03% 처리에서 2.83 mg kg -1 으로 가장 높게 나타났지만, 토마토 수량 측면에서 바이오차 적정 시용비율은 0.05%라고 판단된다.

다국어 초록 (Multilingual Abstract)

Objective of this study was to evaluate an optimum biochar application rate and estimate the carbon sequestration based on the soil chemical properties and growth responses for biochar application during tomatoes cultivation. The treatments consisted of control as recommended application rates of fertilizers, 0.01%, 0.03%, 0.05%, and 0.07% of biochar application(w/w, biochar:soil). For effects of soil chemical properties, the NO 3 -N contents in the soil were peaked at 9 days after transplanting. But there was not significant difference(p>0.05) among the treatments during cultivation periods. However, NH 4 -N contents in the biochar treatment were lower than the control until 14 days of transplanting. P 2 O 5 contents in the biochar treatments were lower than that of the control until 19 days after transplanting except 0.01% of biochar application plot. K 2 O contents in soils treated with 0.01% and 0.03% of biochar were higher until 6 days after transplanting than that in the control. For N use efficiency of biochar application, it was observed that the 0.05% biochar application plot was highest among the treatments. The highest carbon sequestration was estimated at 2.83 mg kg -1 for 0.03% of biochar application. However, it is considered that the optimum biochar application rate was 0.05% for tomato cultivation, considering the growth characteristics and yield components.

목차 (Table of Contents)

• 1. 서 론 2. 재료 및 방법 3. 결과 및 고찰 4. 결 론

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