Abstract

In Sweden, organic pigs are generally produced according to the rules of the economic association KRAV. According to these rules, the pigs shall be held outdoors on pasture during summer period, whereas indoor housing in a simple barn with access to an outdoor pen is permitted only during winter period. The EU permitted systems for organic slaughter pig production with indoor housing and year round access to an outdoor pen with solid flooring and without additional access to plant covered soil are not common in Sweden. The aim of this project is to analyse and describe the consequences different production systems will have on manure management and nutrient balances for organic pig production. A research facility with four housing alternatives for organic fattening pig production has been built at the research farm Odarslöv situated in the south of Sweden. Inside, the housing alternatives are either deep litter or straw flow both combined with slatted floor area. Outside, two of the housing alternatives are based on access to only an outdoor pen with solid flooring, and the other two alternatives also have a yard with pasture during summer period. Nutrient balances (N,P,K) are calculated for the four housing alternatives. “Incoming“ nutrients in the form of feed, roughage and straw are determined via feed utilisation, feed composition and straw usage, respectively. The “outgoing“ nutrients are determined by registration of pig growth, calculation of nutrients contained in the pigs at slaughter, nutrients in produced manure and urine, and the estimation of nutrients accumulated on pasture. Each deep litter bed is weighed at cleaning and samples are analysed. Amount of manure from the slatted area is weighed each fortnight and analysed. Liquid manure from outdoor pens is weighed each fortnight and analysed. Soil tests to determine manure distribution and amounts in the yards are obtained before and after the growing period. Preliminary results will be presented at the seminarium. For each housing alternative, the results will obtain a total picture of the nutrient balance; the amount of manure and nutrients inside the building, in the outside pen and on the pasture; and the amount of nutrients available as farmyard manure and slurry

Keywords

manure; soil- water environment

Published in

Title: NJF-Seminar 372, Manure - an agronomic and environmental challenge

Conference

NJF-seminar no.372, "Manure - an agronomic and environmental challenge"

SLU Authors

• Von Wachenfelt, Hans

  • Department of Rural Buildings and Animal Husbandry [LBT], Swedish University of Agricultural Sciences
    

• Jeppsson, Knut-Håkan

  • Department of Rural Buildings and Animal Husbandry [LBT], Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Animal and Dairy Science
Veterinary Science
Agricultural Science


Permanent link to this page (URI)

https://res.slu.se/id/publ/14150