Characteristics of Ammonia Gas Emission from Soybean Cultivation Soil with Biochar, Fly ash and Microorganisms

Abstract

As ammonia gas caused by nitrogen supply source such as urea in soil is identified as a source of particulate matter, an eco-friendly method to reduce ammonia gas emission while using chemical fertilizers to provide the nutrients required by crops is needed. Therefore, this study evaluated the effects of microorganisms, biochar and fly ash, known as soil conditioners, on the amount of ammonia gas generated in urea-treated soil. The ammonia gas emissions from the soils treated with urea rapidly increased in 2 days, and then declined sharply between days 3 and 15. On the other hand, as a result of adding biochar to the soil treated with urea, the amount of ammonia gas that occurred rapidly in 2 days was reduced, which was dependent on the added amount of biochar. Both Alcaligenes faecalis subsp. and Brevibacillus sp. was effective in reducing ammonia gas generated from urea treated soil. However, the amount of ammonia gas generated from urea-treated soil under different fly ash dosage increased gradually as the amount of fly ash increased, which was considered to be closely related to the pH variation of soil. Above all, biochar and microorganisms have a positive effect on reducing ammonia gas generated from urea-treated soil, while fly ash has a negative effect.

Effect of Soil Amendments Derived from Agricultural Biomass to Improve Corn Growth and Soil Fertility in an Upland Field

“…최근 주목할 만한 연구내용으로는 바이오차의 효과와 관련된 문헌을 살펴볼 수 있다 (Jung et al, 2020;Lee et al, 2020). 바이오차는 산소가 제한된 조건에서 유기성 바이오매스를 이용하여 열분해를 통해서 제조된 탄소 함량이 높 은 물질을 뜻한다.…”