Reducing the excretion of phosphorus from growing and finishing pig systems: development of a Decision Support Tool
Research partner:Newcastle University
Sponsor: AHDB Pork-funded studentship (Vasilis Symeou)
Project duration: 2010 – 2013
Aims and objectives
- To extend a current model of pig growth to predict nutrient excretion, namely Nitrogen (N) and Phosphorous (P), in the environment under different environmental and feeding scenarios, in growing and finishing pig systems
- To be able to formulate pig diets that maximise N and P utilisation whilst minimizing N and P excretion to the environment
Findings to date
- The model was converted into a population one so that it would be able to predict P excretion of populations of pigs (as opposed to the response of the average pig)
- The model found that an increase in the number of phases resulted in an overall decrease in the cumulative P excreted
- It was concluded that phase feeding is a more sustainable strategy than sorting, in terms of P excretion
Symeou V, Leinonen I, Kyriazakis I. (2014) Modelling phosphorus intake, digestion, retention and excretion in growing and finishing pigs: Model description; Animal: An International Journal of Animal Bioscience 13, 1-10.
Symeou V, Leinonen I, Kyriazakis I. (2014) Modelling phosphorus intake, digestion, retention and excretion in growing and finishing pig: Model evaluation; Animal: An International Journal of Animal Bioscience 13, 1-10.