옥수수재배 시 바이오차팰렛 시용량에 따른 토양 화학성 변화에 미치는 영향

박도균(DoGyun Park),김혜원(HyeWon Kim),김희선(HuiSeon Kim),장은숙(EunSuk Jang),신중두(JoungDu Shin) 유기성자원학회 2019 유기성자원학회 학술발표대회논문집 Vol.2019 No.춘계

Objectives of this experiment were to investigate the changes of soil chemical properties and estimate carbon sequestration according to application rates of blended biochar pellet during corn cultivation. The treatments were MgO (40% N + 0.07M MgO), and 60% of blended biochar pellet (60% N) based on the recommended application rates of fertilizer for corn cultivation by National Institute of Agricultural Sciences. Application amounts of 10a -1 and 440kg 10a -1 , respectively. Nitrogen fertilizer was separately applied at 2 times as basal and additional application and the other were applied with whole basal application before transplanting. However, blended biochar pellets were applied as whole basal application with different rates. Chemical analysis was performed in the runoff water and soil, and then measured fresh biomass weight for biomass growth responses of corn to different blended biochar application rates. For the results of this experiment, it shown that the residual contents of NH4-N, NO3-N, P2O5 and K2O in the treatments of blended biochar application rates were lower than those of the control through corn cultivation periods. However, the K2O contents in the treatments were higher than those in the control at 21 days and 51 days after corn transplanting. NH4-N and NO3-N contents of runoff water in the control appeared to be higher than those of the blended biochar pellet treatments, but PO4-P and SiO2 contents did not significantly different (p>0.05) between the control and blended biochar application plots. Carbon sequestration (60.0 kg 10a -1 ) did not significantly different between the control and 40% N + 0.07M MgO treatment plot. Fresh biomass weights in the control were not significantly different with all the treatments except for the 60% N even if reduction of nitrogen fertilizer application were decreased 60% relative to the control. Therefore, it was decided that application of blended biochar pellet for corn cultivation was potential benefit to enhance the nutrient use efficiency as well as reduction of the chemical fertilizer mounts for corn cultivation in agricultural practices.

생장조절제를 이용한 ‘후지’사과의 적과 효과

박도균(DoGyun Park),손태권(TaeKwon Son),최철(Cheol Choi) 한국원예학회 2015 한국원예학회 학술발표요지 Vol.2015 No.10

바이오차 펠렛 시용량에 따른 옥수수 작물재배 시 토양 화학성 변화에 미치는 영향

박도균 ( Dogyun Park ),신중두 ( Joungdu Shin ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-

본 연구의 목적은 밭에서 바이오차 팰렛 사용에 따른 옥수수 재배 시 바이오차 팰렛의 적정 시용비율을 구명하고, 탄소 격리량을 산정하는 것이다. 바이오차 팰렛은 N 40%, N 40%(0.07M MgO), N 60%로 구분하여 처리하였으며, 대조구의 비료 시용량은 15.8-3.0-6.3 kg/10a^-1(N-P-K)으로 처리하였다. 토양 중 NH₄-N및 NO₃-N함량 변화에서 토양중의 질소 함량은 대조구가 처리구에 비해 높게 나타났으며, P₂O ₅함량 변화에서 전 작기에 걸쳐 대조구가 처리구에 비해 높은 반면, K₂0의 함량은 정식 후 21일과 51일에 높게 나타났다. 유거수 중의 NH₄-N및 NO₃-N함량 변화는 대조구가 처리구에 비해 전반적으로 높게 관측이 되었으며, PO₄-P및 SiO₂함량 변화에서는 처리 간에 큰 차이(p〉0.05)가 없었다. 바이오차 팰렛 처리에 따른 토양 탄소 격리량에서는 대조구(60.4 kg 10a^-1)와 N 40% (0.07M MgO)처리 구간에서는 유의차(p〈0.05)를 보이지 않았으며, 옥수수 바이오매스 생체중은 N 60% 바이오차 팰렛 처리구를 제외하고 대조구(1, 123±130.0 kg 10a^-1)에 비해 처리구 간의 유의차가 없었다. 그러므로 바이오차 팰렛 시용에 따른 옥수수 재배 시 질소 약 60%를 저감 할 수 있을 것으로 생각한다.

Assessment of optimum biochar application rate for tomato (Solanum lycopersicum L.) cultivation

DoGyun Park(박도균),JoungDu Shin(신중두) 한국토양비료학회 2018 한국토양비료학회 학술발표회 초록집 Vol.2018 No.10

벼 재배 시 활성 바이오차 팰렛 비료 시용에 따른 논 표면수와 토양의 주요 양분 함량 및 벼 생육에 미치는 영향

이상범(SangBeom Lee),박도균(DoGyun Park),정창윤(ChangYoon Jeong),남주희(JooHee Nam),김민정(MinJeong Kim),남홍식(HongShik Nam),심창기(ChangKi Shim),홍승길(SeungGil Hong),신중두(JoungDu Shin) 유기성자원학회 2022 유기물자원화 Vol.30 No.2

실험은 벼 재배 기간 동안 활성바이오차팰렛 비료(ABPFs) 시용에 따른 벼 생육 반응, 논 표면수 및 토양의 화학적 특성 변화를 평가하였다. 시험구 처리는 대조구, 활성왕겨바이오차 팰렛 비료(ARHBP-40%), 활성 야자수바이오차 팰렛 비료(APBP-40%)로 구성되어 있다. ARHBP-40% 처리구에서 논 표면수의 NH₄⁺-N 및 PO₄⁻-P의 농도가 가장 낮게 관측되었으며, 대조구에서 토양 중의 NH4⁺-N농도가 이양 후 30일 까지 급격하게 감소되었다. 또한, 바이오차 혼합처리구에서 NH₄⁺-N 농도는 이양 후 1일에 9.18 mg L⁻¹로서 가장 낮았으며, 이양 후 56일에 ABPFs 처리구에서 NH₄⁺-N 농도가 1 mg L⁻¹ 이하로 관측되었다. 이앙 후 30일 까지 ARHBP-40% 처리구에서 PO₄⁻-P농도는 0.06 mg L⁻¹에서 0.08 mg L⁻¹ 범주로 처리구 사이로 가장 낮았다. 대조구에 있어 논 토양 중의 NH₄⁺-N 농도는 이양 후 14일에 177.7 mg kg⁻¹ 에서 49.4 mg kg⁻¹로 급격히 감소한 반면, NO₃⁻-N 농도는 13.2 mg kg⁻¹로 가장 높았다. 토양 중의 P₂O₅ 농도는 처리에 관계없이 이양 후부터 수확기 까지 증가하는 경향 이었다. APBP-40% 처리구에서 K₂O 농도는 이앙 후 84일에 252.8 mg kg⁻¹로 가장 높았다. 대조구에서 초장은 다른 처리구에 비해 높았으며, 수량은 대조구와 ARHBP-40% 처리구 사이에 차이가 인정되지 않았다. 따라서 농업 생태계에서 ARHBP-40% 처리를 함에 따라 질소와 인산 시용량을 줄일 수 있다. The application of supplemental activated biochar pellet fertilizers (ABPFs) was evaluated by investigating key factors such as changes of surface paddy water and soil chemical properties and rice growth responses during the growing season. The treatments consisted of control, activated rice hull biochar pellet (ARHBP-40%), and activated palm biochar pellet (APBP-40%) applications. It was shown that the lowest NH₄ ⁺-N and PO₄⁻-P concentrations were observed in surface paddy water to the ARHBP-40%, while the NH₄ ⁺-N concentration in the control was abruptly decreased until 30 days after transplant in the soil. However, the lowest NH₄ ⁺-N concentration in the blended biochar application was 9.18 mg L⁻¹ at 1 day of transplant, but its ABPFs application was observed to be less than 1 mg L⁻¹ at 56 days after transplant. The lowest PO₄⁻-P concentration in paddy water treated ARHBP-40% ranged from 0.06 mg L⁻¹ to 0.08 mg L⁻¹ until 30 days after transplant among the treatments. For the paddy soil, the NH₄ ⁺-N concentration in the control was abruptly decreased from 177.7 mg kg⁻¹ to 49.4 mg kg⁻¹, while NO₃ ⁻-N concentration was highest, 13.2 mg kg⁻¹ in 14 days after transplant. The P₂O₅ concentrations in the soils increased from rice transplants until the harvesting period regardless of the treatments. The highest K₂O concentration was 252.8 mg kg⁻¹ in the APBP-40% at 84 days after transplant. For the rice growth responses, plant height in the control was relatively high compared to others, but grain yield was not significantly different between the control and ARHBP-40%. The application of ARHBP-40% can minimize nitrogen and phosphorous application rates into the agro-ecosystem.

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^-1, N-P-K and 250 kg 10a^-1 of pig manure compost application), supplemented rice hull black carbon pellet (SRHBPN-40%, 3.6 kg 10a^-1 based on TN) and activated palm biochar pellet (SAPBPN-40%, 3.6 kg 10a^-1 based on TN). The results showed that NH₄⁺ -N concentrations were abruptly decreased at 7 days after rice transplant, while low NO₃^--N concentrations were continuously enumerated until 58 days after transplant in the paddy water regardless of treatments. PO₄^--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. SiO₂ 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. P₂O₅ concentrations were eventually increased through 87 days of cultivation periods and then decreased until harvesting time. K₂O concentrations were abruptly increased from 87 days after transplant to the harvest in whole treatments. The highest carbon sequestration was 1.9 tonnes ha^-1 in the MRHBPN-40%, For the greenhouse gases, CH₄ emissions in the APBPN-40% were observed to be lowest, while N₂O 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^-1. 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.

개량한 왕겨 바이오차에 대한 암모늄태 질소의 흡착능 평가

김희선(HuiSeon Kim),김민진(MinJin Kim),박도균(DoGyun Park),윤석인(SeokIn Yun),장은숙(EunSuk Jang),신중두(JoungDu Shin) 유기성자원학회 2019 유기성자원학회 학술발표대회논문집 Vol.2019 No.춘계

This experiment was conducted to evaluate its adsorption capacity of modified rice hull biochar. The biochar treated with 6M KOH solution was carbonized at 850℃. The maximum adsorption of NH4 + -N in aqueous solution and maximum removal rate were 0.65 mg g -1 and 56.3 %, respectively, in 6M KOH modified biochar. For palm biochar, the maximum adsorption and removal rate of PO4 - -P were 0.67 mg g -1 and 56.0%, respectively. It was observed that NH4 + -N in aqueous solution can be only adsorbed in rice hull modified biochar, and PO4 - -P in palm biochar. The sorption of NH4 + -N to 6M modified rice hull biochar was significantly fitted(p<0.001) by Langmuir isotherm model because it was observed that dimensionless constant (RL) was 0.39. The maximum adsorption amount (qm) and binding strength constant (b) were calculated as 0.65 mg g -1 and 0.057 mg L -1 , respectively. Furthermore, the leaching experiment of modified rice hull biochar mixed with soil need to be more elucidated in the future.

토마토 재배 시 바이오차 펠렛 완효성 비료의 적정 시용량 구명

김민진(MinJin Kim),김희선(HuiSeon Kim),박도균(DoGyun Park),이창규(ChangGu Lee ),윤석인(Yun SekIn),장은숙(EunSuk Jang),신중두(JoungDu Shin) 유기성자원학회 2019 유기성자원학회 학술발표대회논문집 Vol.2019 No.춘계

본 연구의 목적은 토마토 재배 시 바이오차 펠렛 완효성 비료의 적정 시용량을 구명하기 위해수행하였다. 바이오차 펠렛 완효성 비료는 돈분과 바이오차를 (6 : 4)로 혼합하고 주요 양분을 분사하여 조제하였다. 바이오차 펠렛 완효성 비료 처리구는 질소기준 40%(N 40%), 50%(N 50%), 70%(N70%)로 구분하여 처리하였고, 전량 기비로 시용하였다. 대조구의 시비량은 11.6-10.3-4.1 kg 10a-1 (N-P-K)을 기비와 추비로 나누어 2회 분시 하였고, 퇴비는 440 kg 10a-1를 기준으로 전량 기비로 시용하였다. 그 결과 토양 중 질소 Balance를 산정하였을 때 바이오차 펠렛 N 40% 처리구에서80%로 가장 높게 산정 되었으며, N 50% 처리구에서는 63.5%로 산정 되었다. P2O5의 농도는 전체생육기간 동안 대조구가 가장 높은 값을 보였고, K2O의 함량은 토마토 재배시기가 지남에 따라 점차적으로 감소하며, 처리 후 10일을 기점으로 감소하는 경향을 보였다. 토마토 수량은 대조구와 비교하여 N 50% 처리구에서 유의차가 없었다. 따라서 토마토 재배 시 바이오차 팰렛 완효성 비료의 적정시용 비율은 관행적인 시비량의 절반인 질소기준 약 6 kg 10a -1인 것으로 판단된다.