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Manure Flushing vs. Scraping in Dairy Freestall Lanes Reduces Gaseous Emissions

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  • Elizabeth G. Ross

    (Department of Animal Science, University of California, Davis, 1 Shields Ave, Davis, CA 95616-8521, USA)

  • Carlyn B. Peterson

    (Department of Animal Science, University of California, Davis, 1 Shields Ave, Davis, CA 95616-8521, USA)

  • Yongjing Zhao

    (Air Quality Research Center, University of California, Davis, 1 Shields Ave, Davis, CA 95616-8521, USA)

  • Yuee Pan

    (Department of Animal Science, University of California, Davis, 1 Shields Ave, Davis, CA 95616-8521, USA)

  • Frank M. Mitloehner

    (Department of Animal Science, University of California, Davis, 1 Shields Ave, Davis, CA 95616-8521, USA)

Abstract

The objective of the present study was to mitigate ammonia (NH 3 ), greenhouse gases (GHGs), and other air pollutants from lactating dairy cattle waste using different freestall management techniques. For the present study, cows were housed in an environmental chamber from which waste was removed by either flushing or scraping at two different frequencies. The four treatments used were (1) flushing three times a day (F3), (2) flushing six times a day (F6), (3) scraping three times a day (S3), and (4) scraping six times a day (S6). Flushing freestall lanes to remove manure while cows are out of the barn during milking is an industry standard in California. Gas emissions were measured with a mobile agricultural air quality lab connected to the environmental chamber. Ammonia and hydrogen sulfide (H 2 S) emissions were decreased ( p < 0.001 and p < 0.05) in the flushing vs. scraping treatments, respectively. Scraping increased NH 3 emissions by 175 and 152% for S3 and S6, respectively vs. F3. Ethanol (EtOH) emissions were increased ( p < 0.001) when the frequency of either scraping or flushing was increased from 3 to 6 times but were similar between scraping and flushing treatments. Methane emissions for the F3 vs. other treatments, were decreased ( p < 0.001). Removal of dairy manure by scraping has the potential to increase gaseous emissions such as NH 3 and GHGs.

Suggested Citation

  • Elizabeth G. Ross & Carlyn B. Peterson & Yongjing Zhao & Yuee Pan & Frank M. Mitloehner, 2021. "Manure Flushing vs. Scraping in Dairy Freestall Lanes Reduces Gaseous Emissions," Sustainability, MDPI, vol. 13(10), pages 1-12, May.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:10:p:5363-:d:552354
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    References listed on IDEAS

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    1. Lenth, Russell V., 2016. "Least-Squares Means: The R Package lsmeans," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 69(i01).
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    Cited by:

    1. Rajeev Bhat & Jorgelina Di Pasquale & Ferenc Istvan Bánkuti & Tiago Teixeira da Silva Siqueira & Philip Shine & Michael D. Murphy, 2022. "Global Dairy Sector: Trends, Prospects, and Challenges," Sustainability, MDPI, vol. 14(7), pages 1-7, April.
    2. Suresh Neethirajan, 2023. "Innovative Strategies for Sustainable Dairy Farming in Canada amidst Climate Change," Sustainability, MDPI, vol. 16(1), pages 1-37, December.

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