数字农科院2.0

LAB-SCALE ASSESSMENT OF AMMONIA EMISSIONS FROM SOLID SWINE MANURE PILES OF DIFFERENT HEIGHTS

文献类型： 外文期刊

作者： Dong, H.

作者机构：

关键词： Manure management;Pile storage;Dynamic vessel;Ammonia emission

期刊名称： APPLIED ENGINEERING IN AGRICULTURE

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收录情况： SCI

摘要： Solid manure storage before land application is a common manure management method in China. Swine manure may be a source of noxious gases and the magnitude of their emissions to the atmosphere may be affected by storage practices. This study quantifies relative ammonia (NH3) emissions from solid swine manure piles of different heights in the lab. Nine dynamic emissions vessels (DEVs) housed inside an environment-controlled chamber (at 25°C) were used to quantify the emissions (three replicates per pile height treatment). The cylindrically shaped manure pile (300-mm diameter) had a height of 100, 200, or 400 mm and the study duration was 42 d. An infrared photoacoustic multi-gas analyzer along with a multi-channel sampler was used to measure gas concentrations in the exhaust from the DEVs receiving the respective treatments. Manure weight, moisture content, and total nitrogen content of the piles were also determined before and after the study. Daily average NH3 emissions (mean ± SD) over the 42-d study period for manure piles with heights of 100, 200, and 400 mm were 2.89±0.36, 2.81±0.34, and 3.85±0.39 g d -1 per m 2 manure surface area, respectively, or 31.0±3.89, 15.3±1.86, and 12.4±1.28 mg d -1 per kg initial manure weight, respectively. Reduction in cumulative NH3 emission on the basis of per kg initial manure weight, over the 42-d storage by the 400-mm pile, as compared with the 100- and 200-mm piles, was 59.9% and 18.5%, respectively. Thus, higher manure piles offer possible means to reduce on-farm NH3 emissions.

分类号： S2

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