Đăng nhập
Tìm kiếm nâng cao
Tên bài báo
Tác giả
Năm xuất bản
Tóm tắt
Lĩnh vực
Phân loại
Số tạp chí

Bản tin định kỳ
Báo cáo thường niên
Tạp chí khoa học ĐHCT
Tạp chí tiếng anh ĐHCT
Tạp chí trong nước
Tạp chí quốc tế
Kỷ yếu HN trong nước
Kỷ yếu HN quốc tế
Book chapter
Tạp chí quốc tế 2018
Số tạp chí 56(2018) Trang: 39-48
Tạp chí: Soil Research

Different sampling times for greenhouse gas measurements have been proposed in many incubation studies. Little is known about effects of closure time on denitrification and nitrification rates from incubation experiments. The objectives of this study were to analyse greenhouse gas (carbon dioxide, methane and nitrous oxide) production from different soils with different times of lid closure and to assess effects of different activation times (defined as additional pre-incubation periods before incubation experiments) on gas emissions from soils. Forty grams of air-dried soil samples (depth 0-10cm) were incubated in 125-mL jars at 25°C with the addition of glucose and nitrate. The first experiment measured greenhouse gas fluxes at different lid-closure times (40, 80, 120 and 1440min). The second experiment assessed the effects of different durations of soil activation (0.7, 1.3, 2 and 24h) on gas emissions. Both were conducted with a completely randomised design, with three replicates per treatment. Our findings showed closure time 2h may cause an underestimate of greenhouse gas emissions. Lengthening activation times resulted in different emission rates consistent with soil characteristics. To measure gas fluxes based on linear regression would require four or five sampling points and sampling at a 20-min interval over a maximum period of 80min for estimating gas fluxes from soil. Because pre-incubation time is critical and a driving factor in the measurement of soil-induced gas emissions, a standardised procedure to quantify gas fluxes is needed for application to other soils.

Các bài báo khác
Số tạp chí 3 (2)(2018) Trang: 68-86
Tạp chí: European Journal of Foreign Language Teaching
Số tạp chí 16(2018) Trang: 255-271
Tạp chí: International Journal of Agricultural Sustainability
Số tạp chí 80(1)(2018) Trang: 19-36
Tạp chí: Sankhya B, The Indian Journal of Statistics
Số tạp chí Volume 50, Issue 4(2018) Trang: 545 – 552
Tạp chí: Bulgarian Chemical Communications
Số tạp chí 10(4)(2018) Trang: 137-148
Số tạp chí 03(2018) Trang: 6334-6345
Tạp chí: International Journal of Social Science and Economic Research
Số tạp chí 2(2018) Trang: 66-74
Tạp chí: Díké Journal
Số tạp chí 49(2)(2018) Trang: 182-191
Tạp chí: Geotechnical Engineering Journal of the SEAGS & AGSSEA
Số tạp chí Volume 50, Issue 4, 391-399(2018) Trang: 391-399
Tạp chí: Korean Journal of Food Science and Technology
Số tạp chí 30(2018) Trang:
Tạp chí: Asia Pacific Journal of Marketing and Logistics
Số tạp chí 4th AADGC(2018) Trang: 237-242
Tạp chí: The 4th International Asian-Australasian Dairy Goat Conference 17-19 October, 2018, Tra Vinh Univ. Vietnam

Vietnamese | English

Vui lòng chờ...