数字农科院2.0

Ammonia and Greenhouse Gases Concentrations and Emissions of a Naturally Ventilated Laying Hen House in Northeast China

文献类型： 外文期刊

作者： Dong, H.;Xin, H.;Xin, H.

作者机构：

关键词： Ammonia;Greenhouse gases (GHG);Laying hens;Emission rate

期刊名称： TRANSACTIONS OF THE ASABE

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年卷期：

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收录情况： SCI

摘要： This study quantifies concentrations and emission rates (ER) of ammonia (NH_3) and greenhouse gases (GHG) including carbon dioxide (CO_2), methane (CH_4), and nitrous oxide (N_2O) from a naturally ventilated cage layer (Hy-Line brown strain) house with daily manure removal, located in northeast China during four seasons of one year, with each monitoring episode lasting five consecutive days. Gaseous concentrations of background and exhaust air were measured using an infrared photoacoustic multi-gas monitor with a multi-channel sampler. Building ventilation rate (VR) was determined by CO_2 mass balance using literature metabolic rate data for modern laying hens. Both gas concentrations and ER showed considerable diurnal and seasonal variations. Annual mean (±SD) ER of NH3, CO_2, CH4, and N_2O for the monitored layer house were, in mg d~(-1) bird~(-1),129 ±40.3, 78,250 ±15,384, 112 ±56.5, and 9.4 ±2.5, respectively, or in g d~(-1) AU~(-1)1 (AU = 500 kg live body weight), 33.4 ±11.4, 19,975 ±3,071, 29.2 ±15.2, and 2.5 ±0.7, respectively. Ammonia ER from the current study was within the ranges of values reported for high-rise houses with annual manure removal and manure-belt houses with daily manure removal. Results of the study contribute toimproving ammonia and GHG emissions inventory for animal feeding operations in China and worldwide.

分类号： S

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