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Measurement of NH₃ Volatilization from Organic Fertilizer Using a Dynamic Chamber
Yun-Gu Kang(강윤구),Jae-Han Lee(이재한),Jin-Hyuk Chun(천진혁),Yong-Jun Yu(유용준),Jun-Yong Lee(이준영),Gi-Bum Yi(이기범),Taek-Keun Oh(오택근) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11
Most organic fertilizers are manufactured using imported ingredients and organic fertilizer can improve the agricultural productivity through soil fertility improvement and microbial activity increase. Ammonia (NH₃) is mostly emitted from the agricultural sector and the NH₃ emission from fertilizer use is about 7%. Biochar can be produced under oxygen-limited conditions using several biomass and biochar has effects such as carbon sequestration and heavy metal adsorption in the soil. In this study, the organic fertilizers (OF) were classified according to the type of ingredients and the mixing ratio, and the NH₃ emission was evaluated using a dynamic chamber method. OF1 and OF2 are commonly used organic fertilizers in domestic, and OF3 and OF4 are manufactured by mixing biochar. When only organic fertilizers were used, OF1 represented the highest emission (25.12 kg ha<SUP>-1</SUP>), and when both organic and inorganic fertilizers were treated, OF3+NPK expressed the most volatilization (155.41 kg ha<SUP>-1</SUP>). When biochar is added to organic fertilizer, the pH and total nitrogen content of the organic fertilizer decreased and the total carbon content and inorganic contents increased. However, when organic fertilizer contained biochar is treated to the soil, it is thought to be beneficial to growth of crops by increasing the content of phosphate and potassium. This study evaluated the possibility of replacing some of the ingredients of organic fertilizer with biochar and the emitted NH₃. Results showed that it is most advantageous to promote crop growth when producing like OF4 type.