数字农科院2.0

Greenhouse gas emissions from swine barns of various production stages in suburban Beijing, China

文献类型： 外文期刊

作者： Dong, H.;Zhu, Z.;Shang, B.;Kang, G.;Zhu, H.;Xin, H.

作者机构：

关键词： methane;nitrous oxide;carbon dioxide;CO_2 balance;natural ventilation

期刊名称： ATMOSPHERIC ENVIRONMENT

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年卷期：

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收录情况： SCI

摘要： Gaseous emissions from animal feeding operations may be influenced by production stage, genetics, dietary type and nutritional plan, housing type, manure handling schemes, and climatic conditions. This study was conducted to quantify annual emission rates (ERs) of greenhouse gases (GHGs)—methane (CH_4), carbon dioxide (CO_2) and nitrous oxide (N_2O) from naturally ventilated swine gestation (GE), farrowing (FA), nursery (NU) and growing-finishing (GF) barns under typical operational conditions in suburban Beijing, China. Variables relative to the GHG ERs were measured every two months for a one-year period, with each measurement episode lasting 72 h. Air exchange rate of the naturally ventilated barns was estimated using CO_2 balance method. The annual mean daily GHG ERs (mean ± SD), expressed in gd~(-1)AU~(-1) (AU = animal unit = 500 live body weight), for the GE, FA, NU, and GF barns were, respectively, 5920±440,7490±110,29670±1090 and 16730± 1060 for CO_2; 9.6± 1.9,9.6± 3.6,58.4± 21.8 and 32.1 ± 11.7 for CH_4; and 0.75 ± 0.56,0.54 ± 0.15,1.29 ± 0.37 and 0.86 ±0.75 for N_2O. The GHG ER values from the current study paralleled those reported in the literature in some cases but differed considerably in other cases. This outcome of similarity and disparity confirms the need to exercise caution when applying literature data to estimation of GHG emissions under various production systems. Results of this study are expected to contribute to the global GHG inventory.

分类号： R12`X51

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