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Deliverable 4.3 Assessment of effects of manure/pasture management on nitrogen and phosphorus losses
RISE Research Institutes of Sweden, Bioeconomy and Health, Agriculture and Food.ORCID iD: 0000-0001-9240-865x
RISE Research Institutes of Sweden, Bioeconomy and Health, Agriculture and Food.ORCID iD: 0000-0002-1260-4835
RISE Research Institutes of Sweden, Bioeconomy and Health, Agriculture and Food.ORCID iD: 0000-0002-9834-1764
2022 (English)Report (Other academic)
Abstract [en]

The POWER project aimed to examine the effectiveness of innovations and best practise in achieving improved pig welfare in Europe. Free-range pasture systems for pigs support the organic principles of natural living, but intensive free-range production is characterized by high risks of nutrient losses, such as nitrogen (N) and phosphorus (P) leaching to surrounding water bodies and also ammonia (NH3) emissions. The scope of this grazing study, with housing pigs on pasture, was eight pig farms located in four countries: Austria, Denmark, Germany and Sweden. Collected farm data showed a large range in values, reflecting the diversity of pasture systems. Average animal density in paddocks per farm varied between 10 and 480 pigs per hectare, with a density in falling order as weaners>fatteners>sows. Vegetation in paddocks varied greatly between farms and also in paddocks within the same farm. Climate, animal density and soil type are important parameters influencing the risk of nutrient losses. Nutrient loads from faeces and urine in paddocks varied with animal density. The calculated loads were rather high in relation to fertilizing needs in crop production at some of the studied farms. This highlights the importance of having enough area for the pigs and/or to limit the period they are hold in the same paddock in order to apply nutrient loads balanced to subsequent crop or vegetation needs. With the highest N load registered in the study, pigs could be held in the paddock approximately one and a half month per year before exceeding the EU regulation of maximum application of 170 kg N per ha with animal manure.

Place, publisher, year, edition, pages
2022. , p. 26
Series
RISE Rapport ; 2022:105
Keywords [en]
outdoor pigs, paddocks, pig production, environmental impact, ley
National Category
Ecology
Identifiers
URN: urn:nbn:se:ri:diva-60124ISBN: 978-91-89711-50-1 (electronic)OAI: oai:DiVA.org:ri-60124DiVA, id: diva2:1696209
Available from: 2022-09-15 Created: 2022-09-15 Last updated: 2023-06-08Bibliographically approved

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Myrbeck, ÅsaSalomon, EvaBark, Linnea

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