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Modélisation du flux de composés à risque pour l'environnement dans un élevage porcin

Abstract : A mathematical model was developed from literature data, in order to predict the volume and composition of the effluent produced by pig farms. Different steps are considered in the model, from the feed entering the pig farm up to the slurry coming out from the piggery. However, storage and spreading procedures are not yet considered in the model. The first set of data accounted for by the model is related to the risk for the environment : nitrogen content of the slurry or N emitted in the air (NH3), phosphorus, copper and zinc, and organic matter. The second set of data is related to the value of the slurry as fertiliser : dry matter, total and available N, organic matter, K, P and Ca. The main sources of variation considered in the model are related to the management of animals (number, performance), of feeding (amount and composition of feed, water supply), and of housing (ambient temperature, ventilation, frequency of slurry removal). The model was validated using 19 experimental studies, most of them on growing pigs, performed in conditions close to these of practical farms. The validation showed that the model was precise and robust for the prediction of slurry volume (R2=0.96) and its nitrogen content (R2=0.91), phosphorus (R2= 0.95) and dry matter (R2 = 0.75). This type of model can be used to calculate nutrient balances in practical conditions, contributing to an improved management of slurry and a reduced risk for the environment. It is also an interesting tool to simulate the effect of different parameters, such as feeding strategy, animal performance or housing conditions, on slurry output. This is illustrated through different examples.
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  • HAL Id : hal-02826461, version 1
  • PRODINRA : 158735



Jean-Yves Dourmad, Candido Pomar, D. Masse. Modélisation du flux de composés à risque pour l'environnement dans un élevage porcin. 34. Journées de la Recherche Porcine, Feb 2002, Paris, France. pp.183-194. ⟨hal-02826461⟩



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