Effects of two types of rice husk biochar on CH4 and N2O emissions from alluvial paddy soil in laboratory condition

Tran Sy Nam * , Ho Minh Nhut , Nguyen Ngoc Bao Tram , Do Thi Xuan , Huynh Van Thao and Nguyen Huu Chiem

* Corresponding author (tsnam@ctu.edu.vn)

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Received: 16 Jan 2020
Revised: 05 Apr 2020
Accepted: 11 May 2020
Published: 11 May 2020
Title: Effects of two types of rice husk biochar on CH4 and N2O emissions from alluvial paddy soil in laboratory condition
DOI: 10.22144/ctu.jsi.2020.075
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How to Cite
Nam, T. S., Nhựt, H. M., Trâm, N. N. B., Xuân, Đ. T., Thảo, H. V., & Chiếm, N. H. (2020). Effects of two types of rice husk biochar on CH4 and N2O emissions from alluvial paddy soil in laboratory condition. CTU Journal of Science, 56(CĐ Khoa học đất), 109-118. https://doi.org/10.22144/ctu.jsi.2020.075
Issue
Vol. 56 No. Special issue on Soil Science (2020)
Section
Agriculture

Abstract

CH4 and N2O emissions from paddy soil plays an important role in reducing greenhouse gas emissions. This study was conducted to evaluate and compare CH4 and N2O emissions from a paddy soil supplemented by 2 types of biochar. The study was set up with 7 treatments including 2 types of rice husk biochar (i) produced by the slow pyrolysis in a laboratory (RB-lab) and (ii) a commercial rice husk biochar (RB) at 0.2, 0.5 and 1% and the control (without biochar). The CH4 emission of all treatments supplemented with either RB-lab or RB was significantly reduced with that of the control (p <0.05). RB-lab decreased 14-18% and RB decreased 16-20% of total CH4 emission. N2O emission was negligible in the submerged paddy soil under in-vitro laboratory. This study showed that RB at 1% reduced CH4 emission better than that of RB-lab.
Keywords: Rice husk biochar, submerged paddy soil, CH4 emission, N2O emission

Tóm tắt

Khí CH4 và N2O từ đất trồng lúa đóng vai trò quan trọng trong giảm phát thải khí nhà kính. Nghiên cứu được thực hiện nhằm so sánh sự phát thải CH4 và N2O khi bổ sung 2 loại biochar trấu khác nhau. Thí nghiệm được bố trí hoàn toàn ngẫu nhiên với bảy nghiệm thức gồm hai loại biochar trấu (i) RB-lab được sản xuất theo phương pháp nhiệt phân chậm trong phòng thí nghiệm và (ii) biochar trấu thương mại (RB) với 0,2, 0,5 và 1% và đối chứng (không biochar). Các nghiệm thức bổ sung RB-lab hoặc RB giảm phát thải CH4 có ý nghĩa so với đối chứng (p<0,05). Bổ sung RB-lab giảm 14-18% tổng lượng CH4 phát thải, trong khi đó RB giúp giảm 16-20%. N2O phát thải không đáng kể trong điều kiện đất ngập nước liên tục trong phòng thí nghiệm. Bổ sung 1% RB cho hiệu quả giảm phát thải tốt hơn so với RB-lab.
Từ khóa: Biochar trấu, đất lúa ngập nước, phát thải CH4, phát thải N2O

Article Details

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