Supplementation of a wheat-based diet low in phosphorus with microbial 6-phytase expressed in Aspergillus oryzae increases digestibility and plasma phosphorus but not performance in lactating sows

Nasir, Z.; Brož, J.; Zijlstra, R. T.

doi:10.1016/j.anifeedsci.2014.10.008

Cited by 6 publications

(1 citation statement)

References 33 publications

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“…Equivalence to the positive control was achieved at the lowest dose, 250 FTU/kg, with further reductions with increasing dose. Nasir et al (2014) reported that supplementation with an Aspergillus oryzae 6-phytase improved nutrient digestibility but not performance in lactating sows. This finding is echoed elsewhere in the literature, with Jongbloed et al (2013) also finding no effect of phytase supplementation on sow BW change throughout lactation.…”

Section: Discussionmentioning

confidence: 99%

The addition of a Buttiauxella sp. phytase to lactating sow diets deficient in phosphorus and calcium reduces weight loss and improves nutrient digestibility

Wealleans

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Dersjant-Li

et al. 2015

Journal of Animal Science

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Improving the efficiency of P use by pigs is especially important for lactating sows, whose metabolic requirements for P and Ca are high. The effect of a sp. phytase on lactating sow performance and nutrient digestibility was investigated using the combined data set for 6 studies. Treatments included a nutritionally adequate positive control diet (PC), a negative control diet (NC; with an average reduction of 0.16% available phosphorous and 0.15% Ca vs. PC), and NC supplemented with a sp. phytase at 250, 500, 1,000 or 2,000 phytase unit (FTU)/kg, respectively. Phosphorus and Ca deficiency in the NC resulted in significantly higher BW loss compared with the PC. All phytase treatments maintained BW loss at the same level as the PC. Increasing doses of phytase significantly ( < 0.05) reduced sow BW loss and increased energy intake, with improvements most apparent in sows older than parity 5. The positive effects on BW and energy intake were not observed in first-parity sows. This may be a consequence of fewer first parity sows in the data set. The apparent total tract digestibility of DM, OM, and CP were not affected by phytase supplementation. Digestible P and Ca were significantly improved (linear, < 0.0001; quadratic, < 0.0001) by increasing the dose of phytase supplementation. Significantly lower apparent total tract digestibility of energy, Ca, and P was found in the NC treatment vs. the PC treatment, whereas no significant differences were found between phytase treatment and the PC treatment. In conclusion, phytase supplementation at a level of 250 FTU/kg can replace 0.16% available phosphorous and 0.15% Ca; however, increasing the phytase dose can further reduce BW loss in sows fed P- and Ca- deficient diets.

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Section: Discussionmentioning

confidence: 99%