ASSESSMENT OF GHGs EMISSION FROM DIFFERENT COW-PAT TREATMENT METHODS AND EFFECTIVENESS OF EM SUPPLEMENTATION

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Tác giả: Thi Thanh Thao Nguyen, Thi Tra Mi Nguyen, Thi Ngoc Mai Tran, Thi Thuy Nhan Tran, Thi Dieu Hien Truong

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Công nghệ và Thực phẩm (Tên mới: Tạp chí Khoa học Đại học Công Thương), 2022

Mô tả vật lý: tr.22

Bộ sưu tập: Metadata

ID: 333235

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Greenhouse gas (GHGs) emission is a great concern in the agriculture industry. These gases mainly consist of methane (CH4), carbon dioxide (CO2), and nitrous oxide (N2O). GHGs might originate from rice farming, livestock, or manure storage. In countryside areas, there are many approaches to archive manure, however, no evidence for GHGs emission evaluation has been conducted. In this study, we aim to testify the GHGs emission among the common cow-pat treatment approaches, including basking, and in-box inoculation with and without surface lid. Furthermore, effective microorganisms (EMs) named Balasa No.1 and EM Balasa No.5 were also deployed in this study to appraise their effects on cow-pat decomposition and GHGs emissions. Results suggest that the basking method releases the least GHGs as compared to in-box inoculation. In addition, the surface lid generates more CO2 than to group without a lid for two weeks of observation. The amendment of EMs rises the temperature of the chamber, preferably increasing CH4 emission in Balasa No.1 treatment while elevating CO2 production in EM Balasa No.5 treatment. To compromise between decreasing GHGs emissions and cow-pat decomposition/ fertilizer transformation, EM Balasa No.5 seems to be the safe choice per this study.Sự phát thải của khí nhà kính (GHGs) là mối lo ngại lớn trong sản xuất nông nghiệp. Những khí chủ yếu bao gồm khí CH4, CO2 và N2O. Khí nhà kính có thể bắt nguồn từ các hoạt động trồng lúa, sản xuất chăn nuôi hoặc quá trình ủ phân. Ở một số vùng nông thôn, có nhiều quy trình ủ phân theo cách thức truyền thống, tuy nhiên chưa có đánh giá về hiệu quả của các quy trình trên. Trong nghiên cứu này, nhóm tác giả đánh giá hiệu quả phát thải khí nhà kính ở các biện pháp khác nhau, bao gồm phơi khô, ủ trong thùng có đậy nắp hoặc không đậy nắp. Bên cạnh đó, các vi sinh vật hữu hiệu (EM) bao gồm Balasa No.1 và EM Balasa No.5 cũng được sử dụng trong nghiên cứu, nhằm đánh giá tác động của EM đến quá trình ủ phân và khả năng phát thải khí nhà kính. Kết quả cho thấy rằng, quá trình phơi khô, giải phóng ít khí nhà kính hơn so với phương pháp ủ thùng. Thêm vào đó, việc đậy nắp tạo ra nhiều khí cacbonic hơn so với không đậy nắp. Quá trình bổ sung EM làm tăng nhiệt độ của thùng ủ và Balasa No.1 có khuynh hướng tăng khí CH4, trong khi đó EM Balasa No.5 giúp tăng khí CO2. Dựa vào kết quả nghiên cứu cho thấy, để cân bằng việc giảm khí thải nhà kính, đồng thời thúc đẩy quá trình ủ phân, phương án bổ sung EM Balasa No.5 là sự lựa chọn được đề xuất

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