Interactive effects of sodium zeolite-A and copper in growing swine: growth, and bone and tissue mineral concentrations
1991
Ward, T.L. | Watkins, K.L. | Southern, L.L. | Hoyt, P.G. | French, D.D.
An experiment was conducted with 64 crossbred pigs to determine the effect of 0 or .50% dietary sodium zeolite-A (NZA) in combination with 0 or 250 ppm supplemental Cu (as CuSO4.5H2O). Pigs were assigned randomly to one of the following four treatments: 1) corn-soybean meal basal (B), 2) B + .50% NZA, 3) B + 250 ppm Cu, or 4) B + 50% NZA + 250 ppm Cu. Each treatment was replicated four times with four pigs per replicate. Average initial weight was 7.5 kg and the experimental period lasted 144 d. Overall rate and efficiency of gain, incidence of gastric ulcers, dressing percentage, carcass weight, percentage of muscling, 10th rib fat, loin eye area, blood urea N, and bone Ca, P, Mn, Fe, Ni, Na, and Al concentrations were not affected by treatment. The addition of 250 ppm Cu increased liver (P < .01), serum (P < .06), and bone (P < .07) Cu concentrations but decreased mean backfat thickness (P < .09), bone ash percentage (P < .03) and serum (P < .09) and bone (P < .01) Zn concentrations. Sodium zeolite-A increased serum alkaline phosphatase (P < .04), carcass length (P < .06), and liver (P < .02) and bone (P < .01) Zn content but decreased (P < .04) serum Ca and serum inorganic P concentrations. Sodium zeolite-A did not protect against liver Cu accumulation or gastric ulceration in growing swine fed 250 ppm supplemental Cu.
显示更多 [+] 显示较少 [-]