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    Urine patch area coverage of an intensively stocked dairy pasture

    Moir, James L.; Cameron, Keith C.; Di, Hong J.; Fertsak, Ulrike
    Abstract
    The urine patch of the grazing cow has been identified as the key source of N loss from pasture-based dairy systems. Although critical to N modelling, quantitative data on the annual area coverage of urine patches in pastures is scarce. A new technique using survey-grade global positioning system (GPS) technology was developed to measure the paddock area coverage of dairy cattle urine and dung patches. A four year study was conducted on an intensively stocked (4.3 cows/ha) dairy farm in Canterbury, New Zealand. Twelve field plots on typical grazed pasture were monitored over a four year period, sampling at 12 week intervals. Urine and dung deposits within the plots were visually identified, the pasture response area (radius) measured and position marked with survey-grade GPS. Spatial geographic information system (GIS) software was used to analyse the data. The mean urine patch pasture response area was 0.35 m². It was calculated that the mean area covered by urine patches on an annual basis was 23.1 ± 2.2 % for the given stocking density and grazing management regime.... [Show full abstract]
    Keywords
    global positioning system (GPS); nitrogen; urine; area coverage; dairy; grazed pasture
    Fields of Research
    0703 Crop and Pasture Production; 0701 Agriculture, Land and Farm Management
    Date
    2010-08
    Type
    Conference Contribution - published (Conference Paper)
    Collections
    • Department of Soil and Physical Sciences [487]
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    © 2010 19th World Congress of Soil Science, Soil Solutions for a Changing World. Archived with publisher permission.
    Citation
    Moir, J. L., Cameron, K. C., Di, H. J., & Fertsak, U. (2010). Urine patch area coverage of an intensively stocked dairy pasture. In R. J. Gilkes & N. Prakongkep (Eds.) Soil Solutions for a Changing World : Proceedings of the 19th World Congress of Soil Science, Brisbane, Australia, 1-6 August 2010. Symposium 3.1.2 Farm systems and environmental impacts (pp. 260-263). Brisbane, Australia: IUSS.
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