Performance, body and carcass composition and
bone characteristics
of pigs fed rapeseed and soyabean meal-cereal diets
supplemented with microbial phytase

Fandrejewski, H.; Weremko, D.; Raj, S. Shanmuga Sundara; Skiba, G.; Han, In K.

doi:10.22358/jafs/69129/1999

Cited by 11 publications

(9 citation statements)

References 14 publications

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“…These inconsistencies can be associated with variations in 1) the origin and concentration of the PP, 2) the origin of the phytase, 3) the real phytase activity, and 4) the dietary Ca and P concentrations of the reference diet (Selle and Ravindran, 2008). The model did indeed show an effect of the first 3 listed sources of variation, A positive relationship between substrate concentration and the magnitude of the response to dietary phytase supplementation was depicted by the model, in agreement with the findings of Fandrejewski et al, (1999) and Sands et al (2009). This observation and the model results corroborate the statement by Selle and Ravindran (2008) that the interaction between phytate and phytase has to be considered when giving dietary recommendations and optimizing the efficiency with which phytase releases P from phytate.…”

Section: Prediction Of the Effect Of Phytase On P And Ca Utilizationsupporting

confidence: 82%

Modeling the fate of dietary phosphorus in the digestive tract of growing pigs1

Létourneau-Montminy

Narcy

Lescoat

et al. 2011

Journal of Animal Science

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Environmental effects of excess P from manure and the soaring price of phosphates are major issues in pig production. To optimize P utilization, it is crucial to improve our capacity to predict the amount of P absorbed, while taking into account the main factors of variation. Mathematical modeling can represent the complexity of the processes and interactions in determining the digestive utilization of P in growing pigs. This paper describes and evaluates a model developed to simulate the fate of the dietary forms of P in the digestive tract of growing pigs, with particular emphasis on the effect of dietary Ca and exogenous phytase on P digestive utilization. The model consists of 3 compartments associated with specific anatomical sections: stomach, proximal small intestine, and distal small intestine. The main metabolic processes occurring in these sections are, respectively, P solubilization/insolubilization and phytate P hydrolysis, and P absorption and P insolubilization. Model parameters governing these flows were derived from in vitro and in vivo literature data. The sensitivity analysis revealed that the model was stable within a large range of model parameter values (±1.5 SD). The model was able to predict the efficacy of Aspergillus niger microbial phytase in accordance with literature values, as well as the decreased efficacy of plant phytase compared with microbial phytase. The prediction capabilities of the model were assessed by comparing actual and simulated P and Ca apparent total-tract digestibility (ATTD) based on published pig data not used for model development. Prediction of P digestibility across 66 experiments and 281 observations was adequate [P ATTD observed = 0.24 (SE, 0.943) + 0.98 (SE, 0.0196) × P ATTD predicted; R(2), 0.90; disturbance error (ED), 96.5%], whereas prediction of Ca digestibility across 47 experiments and 193 observations was less accurate (Ca ATTD observed = 11.1 + 0.75 × Ca ATTD predicted; R(2), 0.78; ED, 20.4%). A lack of agreement between experimental and simulated Ca digestibility was found. This model is, therefore, useful in evaluating P digestibility for different feedstuffs and feeding strategies. It can also be used to provide insight for improving dietary P utilization, especially from plant sources, by quantifying the effect of the mean sources of variation affecting P utilization.

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Section: Prediction Of the Effect Of Phytase On P And Ca Utilizationsupporting

confidence: 82%

Modeling the fate of dietary phosphorus in the digestive tract of growing pigs1

Létourneau-Montminy

Narcy

Lescoat

et al. 2011

Journal of Animal Science

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“…Phytase elicited improvements in P digestibility when assessed over the total tract was 51.2% in the high-phytin and 39.2% in the low-phytin diet. Fandrejewski et al (1999) reported similar results when diets containing rapeseed meal as the protein source compared with diets containing soybean meal as the protein source were fed to pigs. This finding indicates that the response to exogenous microbial phytase is greater when added to a diet containing a greater concentration of phytin.…”

Section: Growth and Ileal Aa Digestibility Response To Phytase And Phmentioning

confidence: 73%

Responses of pigs to Aspergillus niger phytase supplementation of low-protein or high-phytin diets1

Sands¹,

Ragland

Dilger³

et al. 2009

Journal of Animal Science

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Growth and N utilization responses of pigs to Aspergillus niger phytase supplementation of low-protein or high-phytin diets were examined in 2 experiments. In the first experiment, 6 diets arranged in a 3 x 2 factorial with Aspergillus niger phytase at 0, 600, or 1,200 units/kg and dietary protein at 160 or 200 g/kg; and 12 pigs (growth) or 6 pigs (N utilization) per diet were used to test the hypothesis that phytase ameliorates dietary protein effects on growth and nutrient balance. In the second experiment, 4 diets arranged in a 2 x 2 factorial of phytase at 0 or 1,200 units/kg and phytin P at 2.2 g/kg (3.2 g/kg of total P) or 3.9 g/kg (4.9 g/kg of total P); and 12 pigs (growth) or 8 pigs fitted with ileal T-cannulas in a replicated 4 x 4 Latin square (for ileal digestibility of AA) per diet were used to test the hypothesis that increased phytin depresses nutrient utilization and phytase addition ameliorates these effects. Whereas reduced dietary protein depressed (P < 0.001) BW gain and N utilization, phytase in low-protein diet did not alleviate these effects. Although phytase ameliorated phytin-induced reduction in ileal P digestibility (P < 0.001), this was not accompanied by any change in ileal AA digestibility. Given that phytase improved (P < 0.001) P, but not N utilization of diets fed in both studies, phytase-induced improvement in BW gain of pigs fed low-phytin P diets is independent of changes in N utilization.

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“…Ketaren et al [27] found an increase in protein accretion in female pigs supplemented with phytase (1,000 FYT/kg feed) during 35 days of the growing period, suggesting that the enzyme contributes to increasing the utilization of protein from soybean meal. Other authors, however, reported that the inclusion of 500 or 1,000 FYT/kg feed did not result in significant differences in performance or protein deposition in both females and castrated males during the growing phase [33,34].…”

Section: Discussionmentioning

confidence: 99%

Increasing doses of phytase from Citrobacter braakii in diets with reduced inorganic phosphorus and calcium improve growth performance and lean meat of growing and finishing pigs

et al. 2019

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The objective of this study was to evaluate the effect of increasing doses of bacterial phytase (RONOZYME HiPhos) on performance and carcass characteristics of growing and finishing pigs. The study included 120 castrated males with initial weight of 23.21 ± 1.91 kg and 68 days of age, distributed in a randomized block design with five treatments and eight replicates with three animals each. The pigs were fed five corn-soybean meal-based diets: positive control (PC), supplemented with inorganic phosphorus and calcium; negative control (NC), with 0.13% reduction in available phosphorus and 0.11% in calcium; and three NC diets supplemented with 1,000, 2,000, and 3,000 phytase units (FYT)/kg in the feed. Compared with the NC diets without phytase, diets with 1,000, 2,000, and 3,000 FYT/kg inclusion increased the daily weight gain by +12% (quadratic, p<0.05) during the growing I period; +2.9, +2.9, and +10.5% (linear, p<0.01), respectively, during the growing II period; and +4.1, +5.1, and +8.2% (linear, p<0.001), respectively, over the entire experimental period. The daily feed intake increased by 0, +2.8, and +4.3% (linear, p<0.05), respectively, considering the entire experimental period; and the final live weight increased by +3.2, +4.2, and +6.1% (linear, p<0.001), respectively. The phytase treatments did not influence feed conversion ratio, carcass weight and yield, backfat thickness, loin depth and carcass lean meat. According to the European Carcass Classification (SEUROP), however, the animals fed the PC diet and the three phytase levels had more carcasses classified as E (between 55–60% lean meat) when compared to carcasses of pigs fed the NC. Supplementing increasing levels of phytase to a corn- and soybean meal-based diet with inorganic P and Ca reduction improved daily weight gain and feed intake of growing pigs, and such effects were maintained until slaughter age.

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Performance, body and carcass composition and bone characteristics of pigs fed rapeseed and soyabean meal-cereal diets supplemented with microbial phytase

Cited by 11 publications

References 14 publications

Modeling the fate of dietary phosphorus in the digestive tract of growing pigs1

Modeling the fate of dietary phosphorus in the digestive tract of growing pigs1

Responses of pigs to Aspergillus niger phytase supplementation of low-protein or high-phytin diets1

Increasing doses of phytase from Citrobacter braakii in diets with reduced inorganic phosphorus and calcium improve growth performance and lean meat of growing and finishing pigs

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