Feeding a reduced protein diet with a near ideal amino acid profile improves amino acid efficiency and nitrogen utilization for milk production in sows1,2

Journal of Animal Science
Sai ZhangN L Trottier

Abstract

Fifty-four lactating multiparous Yorkshire sows were used to test the hypothesis that feeding a reduced protein diet with a near ideal AA (NIAA) profile increases the biological utilization efficiency of N and essential AA (EAA) for milk production in part as a result of reduced dietary Leu concentration. Sows were fed 1 of 3 isocaloric diets containing the following concentration of CP (% as-fed, analyzed): 18.74 (Control: CON), 13.78 (Optimal: OPT), and 14.25 (Optimal + Leu: OPTLEU). The OPT and OPTLEU diets contained the same concentration of crystalline AA (CAA) to meet requirements of the limiting AA. Crystalline Leu was added to OPTLEU to contain the same SID Leu concentration as that of CON. Sows were weighed on days 1 and 21 of lactation and piglets on days 1, 4, 8, 14, 18, and 21 of lactation. Nitrogen retention was measured for 48 or 72 h between days 4 and 8 (early) and days 14 and 18 (peak) of lactation. Sow BW change and ADFI did not differ between diets. Litter growth rate (LGR) during early lactation did not differ between diets. At peak lactation, LGR was higher in sows fed OPT compared with CON (P < 0.05) and lower in sows fed OPTLEU compared with OPT (P < 0.05). In early and peak lactation, total N retention, ...Continue Reading

References

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Jun 4, 2002·The Journal of Nutrition·Xinfu GuanNathalie L Trottier
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Apr 7, 2006·Annals of the New York Academy of Sciences·Stefan Koelsch
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May 5, 2011·American Journal of Physiology. Endocrinology and Metabolism·Chris TomlinsonPaul Pencharz
Nov 8, 2011·Journal of Environmental Management·María Paz Pérez-SangradorMaría Cruz García-González
Jun 2, 2012·Frontiers in Bioscience (Landmark Edition)·Jian LeiGuoyao Wu
Sep 10, 2014·Amino Acids·Rodrigo ManjarinNathalie L Trottier
Dec 8, 2015·Journal of Animal Science·L HuberN L Trottier
Jun 15, 2017·American Journal of Physiology. Endocrinology and Metabolism·Juan C MariniDouglas G Burrin

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Citations

Sep 11, 2019·Journal of Animal Science·Camilla K HojgaardPeter K Theil
Jan 13, 2021·Porcine Health Management·Joe CrenshawJavier Polo

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