IDEAS home Printed from https://ideas.repec.org/a/eee/agisys/v104y2011i5p383-391.html
   My bibliography  Save this article

Dairy farm nutrient management model: 2. Evaluation of different strategies to mitigate phosphorus surplus

Author

Listed:
  • Huhtanen, Pekka
  • Nousiainen, Juha
  • Turtola, Eila

Abstract

To reduce (P) surpluses on dairy farms and thereby the risk of P losses to natural waters we studied different management alternatives by a nutrient balance model described in the companion paper. The strategies evaluated mitigating the P surpluses were: mineral P fertilisation, dietary mineral P supplementation, replacement rate, animal density, production level, feeding intensity, dietary P concentration and nutrient efficiency in crop production. Responses to several interventions (e.g. mineral P fertilisation, purchased feed P, replacement rate) were similar to those observed in Finnish field studies. Reducing or completely giving up the use of purchased mineral P fertilisers was the most efficient measure to reduce P surplus. The slope between the amount of mineral fertilisers and P surplus was 0.98-0.99 (in the field data 1.0). Increased animal density resulted in a greater P surplus, but the slope between P input from purchased feed and surplus was considerably smaller (0.65) than that of P fertilisation. Increasing milk yield with improved genetic potential of the cows would have minimal effects on P surplus per unit of product, but it would increase P surplus per hectare. When the intensity of energy and protein feeding was increased, P surplus rose markedly both per unit of product and hectare. This is (1) due to increased dietary P concentration and (2) due to smaller marginal production responses than those calculated from feeding standards. Reducing dietary P concentration by constraining P excess per kg milk in least-cost ration formulation improved P efficiency in milk production and dairy farming system. However, feed cost increased as low P energy (sugar-beet pulp) and protein (soybean meal) supplements are more expensive than cereal grains or rapeseed feeds. Improving the nutrient use efficiency in crop production had a strong influence in the whole-farm efficiency and P surplus. The modelling results showed that Finnish dairy farms have a great potential to improve P efficiency and reduce P losses to the environment, even by increasing production intensity (milk/ha). It is concluded that the most cost-effective scenario to mitigate P surpluses at a dairy farm would be to reduce or give up the use of mineral P as fertilisers and supplements, and to improve the use of present soil P reserves.

Suggested Citation

  • Huhtanen, Pekka & Nousiainen, Juha & Turtola, Eila, 2011. "Dairy farm nutrient management model: 2. Evaluation of different strategies to mitigate phosphorus surplus," Agricultural Systems, Elsevier, vol. 104(5), pages 383-391, June.
  • Handle: RePEc:eee:agisys:v:104:y:2011:i:5:p:383-391
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0308-521X(11)00012-6
    Download Restriction: Full text for ScienceDirect subscribers only

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Modin-Edman, Anna-Karin & Oborn, Ingrid & Sverdrup, Harald, 2007. "FARMFLOW--A dynamic model for phosphorus mass flow, simulating conventional and organic management of a Swedish dairy farm," Agricultural Systems, Elsevier, vol. 94(2), pages 431-444, May.
    2. Buysse, J. & Van Huylenbroeck, G. & Vanslembrouck, I. & Vanrolleghem, P., 2005. "Simulating the influence of management decisions on the nutrient balance of dairy farms," Agricultural Systems, Elsevier, vol. 86(3), pages 333-348, December.
    3. Nousiainen, J. & Tuori, M. & Turtola, E. & Huhtanen, P., 2011. "Dairy farm nutrient management model. 1. Model description and validation," Agricultural Systems, Elsevier, vol. 104(5), pages 371-382, June.
    4. Babcock, Bruce A., 1992. "Effects of Uncertainty on Optimal Nitrogen Applications (The)," Staff General Research Papers Archive 10588, Iowa State University, Department of Economics.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Buckley, Cathal & Wall, David P. & Moran, Brian & O'Neill, Stephen & Murphy, Paul N.C., 2016. "Phosphorus management on Irish dairy farms post controls introduced under the EU Nitrates Directive," Agricultural Systems, Elsevier, vol. 142(C), pages 1-8.
    2. Mihailescu, E. & Ryan, W. & Murphy, P.N.C. & Casey, I.A. & Humphreys, J., 2015. "Economic impacts of nitrogen and phosphorus use efficiency on nineteen intensive grass-based dairy farms in the South of Ireland," Agricultural Systems, Elsevier, vol. 132(C), pages 121-132.
    3. Cathal Buckley & Paul Murphy & David Wall, 2013. "Farm-gate N and P balances and use efficiencies across specialist dairy farms in the Republic Ireland," Working Papers 1302, Rural Economy and Development Programme,Teagasc.
    4. Nousiainen, J. & Tuori, M. & Turtola, E. & Huhtanen, P., 2011. "Dairy farm nutrient management model. 1. Model description and validation," Agricultural Systems, Elsevier, vol. 104(5), pages 371-382, June.
    5. Vadas, Peter A. & Mark Powell, J. & Brink, Geoff E. & Busch, Dennis L. & Good, Laura W., 2015. "Whole-farm phosphorus loss from grazing-based dairy farms," Agricultural Systems, Elsevier, vol. 140(C), pages 40-47.
    6. Áine Macken-Walsh & Anne Byrne & Nata Duvvury & Tanya Watson, 2014. "Gender, Power and Property: “In my own right”," Working Papers 1401, Rural Economy and Development Programme,Teagasc.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:agisys:v:104:y:2011:i:5:p:383-391. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Dana Niculescu). General contact details of provider: http://www.elsevier.com/locate/agsy .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.