Ammonia and Carbon Dioxide Emissions vs. Feeding and Defecation Activities of Laying Hens

dc.contributor.author Ning, Xiaopeng
dc.contributor.author Xin, Hongwei
dc.contributor.author Xin, Hongwei
dc.contributor.author Li, Hong
dc.contributor.author Zhang, Ruihong
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T04:09:49.000
dc.date.accessioned 2020-06-29T22:31:39Z
dc.date.available 2020-06-29T22:31:39Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2008
dc.date.embargo 2012-12-13
dc.date.issued 2008-06-01
dc.description.abstract <p>This study characterizes dynamic ammonia (NH3) and carbon dioxide (CO2) emissions associated with feeding and defecation activities of laying hens. Manure handling scheme used was reflective of commercial manure-belt house operation. Four dynamic emission chambers and measurement system was developed, featuring continuous measurement of the following variables for each chamber: (a) NH3 concentrations of inlet and outlet air, (b) air temperature and relative humidity, (c) airflow rate, (d) feeder weight and thus feeding activity, and (e) manure pan weight and thus defecation activity. Daily feed consumption of the hens averaged 103 g/hen-d and fresh manure production averaged 125 g/hen-d. Ammonia emission rate ranged from 1.26 mg/hen-hr on the first day of manure accumulation to 9.26 mg/hen-hr after 7 d of manure accumulation. CO2 emission rate averaged 3.41 and 2.47 g/hen-hr during light and dark hours of the day, respectively. Dynamic NH3 emissions tend to be inversely related to defecation events as manure accumulates. Results from this study will contribute to the development and/or validation of process-based farm emission model for predicting NH3 emissions from laying-hen houses. The dynamic nature of NH3 emissions vs. defecation may also provide insight concerning application timing of manure treatment agents to mitigate NH3 emissions from laying-hen houses.</p>
dc.description.comments <p>This is an ASABE Meeting Presentation, Paper No. <a href="http://elibrary.asabe.org/abstract.asp?aid=25067&t=3&dabs=Y&redir=&redirType=" target="_blank">084448</a>.</p>
dc.identifier archive/lib.dr.iastate.edu/abe_eng_conf/127/
dc.identifier.articleid 1122
dc.identifier.contextkey 3535261
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_conf/127
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/125
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_conf/127/Xin_2008_AmmoniaCarbonDioxide.pdf|||Fri Jan 14 19:27:41 UTC 2022
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords NH3 emission
dc.subject.keywords CO2 emission
dc.subject.keywords defecation
dc.subject.keywords layer house
dc.subject.keywords process-based modeling
dc.title Ammonia and Carbon Dioxide Emissions vs. Feeding and Defecation Activities of Laying Hens
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication 36e0a8ce-fa2e-4df4-9f67-8d1717122650
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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