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벼 재배 시 바이오차 펠렛 비료 시용에 대한 농업환경 영향 평가
신중두 ( Joungdu Shin ),박도균 ( Dogyun Park ),김희선 ( Huiseon Kim ),최은정 ( Eunjong Choi ),이선일 ( Sunil Lee ),박상원 ( Sangwon Park ),박광호 ( Kwang-ho Park ),정인호 ( In-ho Jung ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
Objective of this experiment was to investigate the agro-environmental effect in rice paddy and water system during rice cultivation. The treatments consisted of control (9-4.5-5.7 kg 10a<sup>-1</sup>, N-P-K and 250 kg 10a<sup>-1</sup> of pig manure compost application), supplemented rice hull black carbon pellet (SRHBPN-40%, 3.6 kg 10a<sup>-1</sup> based on TN) and activated palm biochar pellet (SAPBPN-40%, 3.6 kg 10a<sup>-1</sup> based on TN). The results showed that NH<sub>4</sub><sup>+</sup> -N concentrations were abruptly decreased at 7 days after rice transplant, while low NO<sub>3</sub><sup>-</sup>-N concentrations were continuously enumerated until 58 days after transplant in the paddy water regardless of treatments. PO<sub>4</sub><sup>-</sup>-P concentrations in the control were higher than the other treatment through rice cultivation periods except for 7 days after transplant. K+ concentrations were continuously decreased with delaying the growth period. SiO<sub>2</sub> concentrations did not significantly different among the treatment. For the paddy soil,the mineralization and nitrification rates were abruptly decreased at 37 days and 15 days after transplant in whole treatments, respectively. P<sub>2</sub>O<sub>5</sub> concentrations were eventually increased through 87 days of cultivation periods and then decreased until harvesting time. K<sub>2</sub>O concentrations were abruptly increased from 87 days after transplant to the harvest in whole treatments. The highest carbon sequestration was 1.9 tonnes ha<sup>-1</sup> in the MRHBPN-40%, For the greenhouse gases, CH<sub>4</sub> emissions in the APBPN-40% were observed to be lowest, while N<sub>2</sub>O emissions were lowest until 37 days after transplant in the MRHBPN-40%. For growth responses, the grain yield was not significantly different between the control and MRHBPN-40%, but highest straw yield was 12.18 tonnes ha<sup>-1</sup>. Therefore, modified supplemented biochar pellets have a potential ability to utilize for reducing agricultural impacts as well as greenhouse gas mitigation for the rice cultivation.
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