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Reproductive performance of gilts and sows as affected by induced biotin deficiency and subsequent dietary biotin supplementation



Reproductive performance of gilts and sows as affected by induced biotin deficiency and subsequent dietary biotin supplementation



Journal of Animal Physiology & Animal Nutrition 55(4-5): 196-208



Reproductive performance of female swine was evaluated during progressive biotin depletion to induce a biotin deficiency and also during subsequent dietry biotin supplementation to reverse the induced deficiency symptoms. In phase I (parities 1 and 2), 16 bred gilts and thereafter sows were fed a barley-wheat basal diet (fortified with egg white) with no added biotin, and another 16 the basal diet (without egg white) supplemented with 250 .mu.g biotin/kg. In phase II (parities 3 and 4), the 16 biotin deficient sows were allocated into 4 groups and fed the basal (egg white-free) diet without added biotin or supplemented with 100, 200 or 400 .mu.g biotin/kg. In phase I, biotin deficient in contrast to biotin adequate females farrowed and weaned fewer piglets. These animals also had longer weaning-conception intervals by 54.5 d (parity 1) and 39.2 (parity 2), attributable to the larger proportion of bred B-sows returning to oestrus. As a consequence, percentage-unit decreases in conception rate following breeding at first postweaning oestrus was lower by 50 (parity 1) and 54 (parity 2). These latter observations coupled with greater sow lactation weight loss and lower postweaning serum levels of steroid reproductive hormones, especially oestradiol-17.beta., suggested that the physiology of the endocrine system might be altered during biotin deficiency in sows. Biotin supplementation enhanced sow reproductive performance as measured by greater number of piglets farrowed and weaned, heavier litter weaning weights and shorter sow postweaning-conception intervals. Supplemental biotin level of 100 .mu.g/kg diet (to provide 147 .mu.g available biotin/kg) seemed to optimise sow reproductive performance.

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Accession: 001673298

Download citation: RISBibTeXText

DOI: 10.1111/j.1439-0396.1986.tb00720.x



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