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  • Title: Feeding Solanum glaucophyllum to preparturient multiparous cows prevents postparturient hypocalcemia.
    Author: Ishii J, Uramoto A, Nagao Y, Goto H.
    Journal: Anim Sci J; 2015 Oct; 86(10):869-77. PubMed ID: 26208138.
    Abstract:
    Solanum glaucophyllum (SG) contains 1,25-dihydroxyvitamin D3 (1,25-(OH)2D3) glycosides. We investigated the effect of SG on hypocalcemia in cows. Serum levels of 1,25-(OH)2D3, total calcium and phosphorus dose-relatedly increased after feeding with SG, while serum magnesium and chloride levels fell (P < 0.05). We also performed an ethylenediaminetetraacetic acid (EDTA) infusion to induce artificial hypocalcemia. Cows that had been fed 4.0 mg/kg body weight of SG daily for 2 weeks had a higher serum concentration of total calcium at the end of EDTA infusion than those not fed SG (P < 0.05). In a field trial, multiparous cows were assigned to one of four groups: (1) no SG, (2) 1.3 g or (3) 2.6 g of SG daily from 14 days before the estimated calving day until 3 days after calving, or (4) a single feed of 35.75 g SG at 3 days before the estimated calving day. The concentrations of serum total calcium after the calving in each treatment group were (1) 7.4, (2) 7.9, (3) 8.0 and (4) 8.9 mg/dL and higher for (4) than for (1) (P < 0.05). The data suggests that feeding a high dose of SG before the calving may maintain higher concentrations of serum calcium after the calving.
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