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Gå till första sidan Manure handling Göran Carlson JTI - Swedish Institute of Agricultural and Environmental Engineering
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Nutrient flows from agriculture
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Components in manure
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Water Spilt water Dishwater Cleaning water Precipitation - evaporation Litter Bedding material Feed residuals
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Factors influencing the distribution of components in manure
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Chemical composition of Solid and Semi-solid manure Bild diagram flyt- resp fastgödsel Kg/tonnes Total NAmmonia NPhosphorusPotassium
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Chemical composition of slurry Kg/tonnes PhosphorusAmmonia N Potassium Total N
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Availability and loss of N for manure from milking cows
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Aspects on manure handling systems
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Basic rules for planning manure handling systems Analyse and discuss the situation on each farm in order to select a suitable manure handling system which : Optimises utilisation of nutrients Supports good animal welfare to achieve high production Create good and safe working conditions
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Basic rules for planning manure handling systems, cont. The most suitable manure handling system for an individual farm could not be selected without taking into account: All other handling chains on the farm The farmer’s knowledge and future plans The farmer’s economic situation
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Important parameters for planning of manure handling systems Selection of handling system depends on the farmers knowledge, interests and planning horizon
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JTI - Institutet för jordbruks- och miljöteknik
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Types of manure in Sweden According to Satistics Sweden 1987/881992/931998/99 0 20 40 60 80 100 Solid manure Semi-solid manure Urine Slurry
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Mucking out
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Why should I work for a well functioning manure handling system in my barn? Higher production Cleaner animals Better animal health Better hygienic status Better working conditions
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Manure Spreading
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Spreading precision, application rate, longitudinal and transversal
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Factors causing ammonia emissions
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Rear discharge, one-step spreader, vertical beaters
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Rear discharge, one-step spreader, horizontal beaters
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Rear discharge, two-step spreader, horizontal beaters + spreading discs
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Rear discharge, two-step spreader, longitudinal augers + spreading discs, especially for semi-solid manure
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Slurry spreader with splash plate
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Slurry spreader with trailing hoses
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Spreading technique for slurry in Sweden 1998/99 According to Statistics Sweden Entire country 66% splash plate 26% trailing hoses 8 % technique unknown Southern Sweden 43 % splash plate 56% trailing hoses 1% technique unknown
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Advantages and disadvantages, shallow injection versus traditional technique Advantages: Low ammonia losses Improved feed quality Higher N-utilisation Low odour emissions Disadvantages: Increased power requirement Increased spreading costs Risk for damage in ley
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Harvested winter wheat after broadcast and band spreading of slurry at different occasions
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Hygienic risks in grassland cropping
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