Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 425358
Title Reducing the sampling periods required in protocols for establishing ammonia emissions from pig fattening buildings using measurements and modelling
Author(s) Mosquera Losada, J.; Ogink, N.W.M.
Source Biosystems Engineering 110 (2011)2. - ISSN 1537-5110 - p. 90 - 96.
DOI http://dx.doi.org/10.1016/j.biosystemseng.2011.06.010
Department(s) Livestock Research
LR - Backoffice
Publication type Refereed Article in a scientific journal
Publication year 2011
Abstract Ammonia (NH(3)) emission factors for animal housing systems in the Netherlands are based on measurements using standardised measurement protocols. Both the original Green Label (GL) protocol and the newly developed multi-site sampling protocol are based on year-round sampling periods. The objective of this study was to develop a measurement approach in which sampling periods are substantially shortened (i.e. to six months) whilst minimising the loss of overall accuracy compared to year-round sampling. Two methods were investigated: method A that combined measurements with a statistical model obtained from an extensive dataset of GL measurements for housing systems of fattening pigs, method B that used only measurement data to calculate year-round emission levels. Both approaches were investigated for application on mechanically ventilated housing systems for fattening pigs. The accuracy of both methods was evaluated by applying them to another dataset from five different pig housing systems. A reduction of sampling period from twelve to six months led to small increases in the overall random measurement error of the mean emission. The increase was least for method A because of the modelling component in this approach. Shortening of the sampling period may result in the risk of systematic deviations from the reference values. These systematic deviations are lower (although statistically significant) for method A (-4.1 to 4.7%) compared to B (-6.8 to 6.4%). If a small (
Comments
There are no comments yet. You can post the first one!
Post a comment
 
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.