The Effect of Concentrate Feeding on Calcium Metabolism and Plasma Gastrin Concentration in Parturient Cows |
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Authors: | Luthman Jan Jacobsson Sten-Olof Nilsson Göran |
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Affiliation: | 1.Department of Medicine II and the Department of Physiology, Swedish University of Agricultural Sciences, S-750 07, Uppsala, Sweden ; |
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Abstract: | The effect of concentrate feeding on calcium metabolism was studied in pregnant cows. The concentrate (5 kg/day) was added to the diet about three weeks before expected calving. A control group was fed only hay during the whole dry period. It was earlier observed in sheep that concentrate feeding was followed by a disturbance in calcium homeostasis, but no such disturbances were observed in the cows. The concentrate fed cows consumed 50 % more calcium than the controls and were found to mobilize less calcium from the skeleton immediately after calving. There was no evidence for the theory that the gastro-intestinal hormone gastrin is involved in calcium homeostasis in the parturient cow. |
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