Models to quantify excretion of dry matter, nitrogen, phosphorus and carbon in growing pigs fed regional dietsReport as inadecuate




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Journal of Animal Science and Biotechnology

, 4:42

First Online: 09 November 2013Received: 04 July 2013Accepted: 30 October 2013

Abstract

Modern pig production contributes to many environmental problems that relate to manure, especially in areas with highly intensive production systems and in regions like Asia where the regulative control is not effective. Therefore, the objective of this study was to use three different pig diets varying in dietary protein, fibre and fat as representative for Danish DK, Thai TH and Vietnamese VN pig production to develop and evaluate different approaches to predict-calculate excretion from growing pigs in comparison with the experimentally determined values.

Nine female growing pigs were used in a digestibility and balance experiment. Excretion of dry matter DM, nitrogen N, phosphorus P and carbon C of the experimental diets were determined.

Due to the highest dietary fibre content, VN had the lowest digestibility of N, P and C 73, 49, and 73%, respectively compared with the DK and TH pig diets. From the known diet composition using standard table values on chemical and nutrient digestibly, high accuracy bias and low variation was found and the results could be used for prediction on chemical composition and excretion in faeces and urine in growing pigs. Calculation based on standard values regarding nutrient retention in the pig body as used in the Danish manure normative system DMNS showed likewise to be quite useful for quantifying the total excretion of N and P.

Overall, the results demonstrate that simple models that require cheap and normally available information on dietary nutrients can give useful information on nutrient excretion in growing pigs.

KeywordsExcretion Faeces Nitrogen Phosphorus Prediction Urine AbbreviationsDMNSDanish manure normative system

RMSEPRoot men square error of prediction

DFTotal dietary fibre calculated as the residual fraction after subtraction of the analysed content of sugar, starch, crude protein, crude fat and ash from the dry matter.

Electronic supplementary materialThe online version of this article doi:10.1186-2049-1891-4-42 contains supplementary material, which is available to authorized users.

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Author: Henry Jørgensen - Trakarn Prapaspongsa - Van Thi Khanh Vu - Hanne Damgaard Poulsen

Source: https://link.springer.com/







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