Phosphorus digestibility is highly influenced by phytase but slightly by calcium in growing pigs

Poulsen, Hanne; Carlson, D.; Nørgaard, J.V.; Blaabjerg, K.

doi:10.1016/j.livsci.2010.06.110

Cited by 25 publications

(36 citation statements)

References 11 publications

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“…The agreement with the experiment of Lopes et al (2009) also gives some confidence in the value Figure 8 Comparison of experimental observations (■,•) by Poulsen et al (2010) to simulated predictions (□,○) of (a) retained P and (b) total P excreted. They investigated the effects of different levels of dietary calcium, with (•,○) and without (■,□) 750 FTU of microbial Aspergillus niger phytase and the diet had 600 FTU/kg diet plant phytase activity.…”

Section: Comparison Of Model With Published Trialssupporting

confidence: 63%

“…The model showed a moderate qualitative and quantitative agreement with the measured P retained and total P excreted of the studies of Stein et al (2011) and Poulsen et al (2010) who investigated the effects of different levels of limestone supplementation. The predicted and observed P retained in the study of Stein et al (2011) followed the same pattern when limestone was supplemented, indicating that the model accurately predicted the effect that dietary Ca had on P retained and excreted.…”

Section: Comparison Of Model With Published Trialsmentioning

confidence: 57%

“…Studies that met the above criteria were used in the evaluation process to test for the effect of: (1) inclusion of inorganic P (Ekpe et al, 2002;Lopes et al, 2009); (2) different levels of phytate in the diet (Trujillo et al, 2010); (3) Aspergillus niger and Escherichia coli phytase supplementation (Akinmusire and Adeola, 2009;Jendza and Adeola, 2009;Poulsen et al, 2010;Trujillo et al, 2010;Almeida and Stein, 2012); (4) different levels of dietary Ca Stein et al, 2011). For detailed description of these studies, see Supplementary Material S2.…”

Section: Sensitivity Analysesmentioning

confidence: 99%

“…Finally, Poulsen et al (2010) evaluated the effect of dietary Ca with and without microbial phytase supplementation in a plant phytate-rich diet. The simulated and observed data for P retained without phytase supplementation decreased with increasing dietary Ca content (r = 0.42; Figure 8).…”

Section: Sensitivity Analysesmentioning

confidence: 99%

“…In this study the P content of the diet was relatively low, explaining the negative effect of increasing Ca on P digestion. Nevertheless, the model over-estimated the P retained and hence under-estimated the P excreted when phytase was supplemented at low dietary Ca content diets in the study of Poulsen et al (2010). Such an over-estimation would be accounted for by the suggestion of Létourneau-Montminy et al (2012), who stated that if not sufficient amount of dietary Ca is digested then digestible P cannot bind with digestible Ca for bone formation, therefore digestible P is excreted through the urinary tract.…”

Section: Comparison Of Model With Published Trialsmentioning

confidence: 99%

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Modelling phosphorus intake, digestion, retention and excretion in growing and finishing pig: model evaluation

Symeou

Leinonen

Kyriazakis

2014

Animal

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A deterministic, dynamic model was developed, to enable predictions of phosphorus (P) digested, retained and excreted for different pig genotypes and under different dietary conditions. Before confidence can be placed on the predictions of the model, its evaluation was required. A sensitivity analysis of model predictions to ±20% changes in the model parameters was undertaken using a basal UK industry standard diet and a pig genotype characterized by British Society Animal Science as being of 'intermediate growth'. Model outputs were most sensitive to the values of the efficiency of digestible P utilization for growth and the non-phytate P absorption coefficient from the small intestine into the bloodstream; all other model parameters influenced model outputs by <10%, with the majority of the parameters influencing outputs by <5%. Independent data sets of published experiments were used to evaluate model performance based on graphical comparisons and statistical analysis. The literature studies were selected on the basis of the following criteria: they were within the BW range of 20 to 120 kg, pigs grew in a thermo-neutral environment; and they provided information on P intake, retention and excretion. In general, the model predicted satisfactorily the quantitative pig responses, in terms of P digested, retained and excreted, to variation in dietary inorganic P supply, Ca and phytase supplementation. The model performed well with 'conventional', European feed ingredients and poorly with 'less conventional' ones, such as dried distillers grains with solubles and canola meal. Explanations for these inconsistencies in the predictions are offered in the paper and they are expected to lead to further model development and improvement. The latter would include the characterization of the origin of phytate in pig diets. Keywords: mathematical model, phosphorus, phytate, pig, sensitivity analysis ImplicationsThe model developed in the companion paper (Symeou et al., 2014) and evaluated here predicts adequately the P digestion, retention and excretion of growing-finishing pigs for a wide range of dietary compositions and for pigs of different genotypes. Consequently, the model can be applied to develop feeding strategies to optimize phosphorus (P) utilization and minimize the different forms of P excreted to the environment. The model can be further improved, by considering 'reactive' as opposed to total phytate content of the diet, as well as experimentally establishing the net efficiency of digestible P utilization for growth and the non-phytate P absorption coefficient from the small intestine into the bloodstream, for pigs offered access to different diets.

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Section: Comparison Of Model With Published Trialssupporting

confidence: 63%

Section: Comparison Of Model With Published Trialsmentioning

confidence: 57%

Section: Sensitivity Analysesmentioning

confidence: 99%

Section: Sensitivity Analysesmentioning

confidence: 99%

Section: Comparison Of Model With Published Trialsmentioning

confidence: 99%

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Modelling phosphorus intake, digestion, retention and excretion in growing and finishing pig: model evaluation

Symeou

Leinonen

Kyriazakis

2014

Animal

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Aqueous Two-Phase Systems for the Recovery and Purification of Bioproducts from Plants and Vegetable Tissues

Aguilar

2017

Food Engineering Series

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Nutritive value of tropical forage plants fed to pigs in the Western provinces of the Democratic Republic of the Congo

Kambashi

Picron

Boudry

et al. 2014

Animal Feed Science and Technology

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13The nutritive value of 20 forage plants commonly used for feeding pigs in the Democratic 14Republic of the Congo was studied to determine chemical composition, protein amino acid 15 profiles, mineral content, and in vitro digestibility using a two-steps method combining an 16 enzymatic pepsin and pancreatin hydrolysis followed by a 72h gas-test fermentation. nutrients. Gas production during fermentation of the pepsin and pancreatin-indigestible 29 fraction of the plants varied from 42 ml/g DM for A. mangium to 202 ml/g DM for I. batatas 30 (P<0.001). Short-chain fatty acid production during fermentation varied from 157 to 405 mg/g 31 of the pepsin and pancreatin indigestible fraction. It is concluded that some of these species 32 are interesting sources of proteins and minerals with a good digestibility that might be used 33 more economically than concentrate, especially in smallholder production systems, to 34 improve pig feeding, mineral intake and intestinal health in pigs reared in the tropics. 35 36

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Phosphorus digestibility is highly influenced by phytase but slightly by calcium in growing pigs

Cited by 25 publications

References 11 publications

Modelling phosphorus intake, digestion, retention and excretion in growing and finishing pig: model evaluation

Modelling phosphorus intake, digestion, retention and excretion in growing and finishing pig: model evaluation

Aqueous Two-Phase Systems for the Recovery and Purification of Bioproducts from Plants and Vegetable Tissues

Nutritive value of tropical forage plants fed to pigs in the Western provinces of the Democratic Republic of the Congo

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