Feeding Solanum glaucophyllum to preparturient multiparous cows prevents postparturient hypocalcemia |
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| Authors: | Junichiro Ishii Akifumi Uramoto Yoshikazu Nagao Hisaya Goto |
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| Institution: | 1. Reseach and Development Center of Feed & Livestock Development Division, Nippon Formula Feed Manufacturing Company Limited, Tochigi, Japan;2. Department of Animal Production Science United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan;3. University Farm, Department of Agriculture, Utsunomiya University, Tochigi, Japan |
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| 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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| Keywords: | 1 25dihydroxyvitaminD3 calcium Holstein cows milk fever Solanum glaucophyllum |
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