Utilization of aquatic plants Elodea canadensis and Hydrilla verticillata in laying hen diets. II. Macrominerals and microminerals
1989
Lizama, L.C. | McDowell, L.R. | Marion, J.E.
A 56-day experiment involving 320 Hy-line W-77 laying hens 10 months of age was conducted to evaluate the feeding of two aquatic plants -- elodea (Elodea canadensis) and hydrilla (Hydrilla verticillata) -- and their effects on mineral status. Aquatic plants were substituted for corn and soybean meal at a dietary level of 7.5%. Blood, liver, kidney, muscle, and egg samples were collected at experiment termination to measure the P, K, Mg, Na, Mn, Fe, Cu, Zn, Mo, Co and Se concentrations. These aquatic plants contained more protein, lysine, threonine and valine than corn. Aquatic plants also were higher than soybean meal and corn with respect to Mg, Na and trace elements, particularly Mn and Fe. Mineral concentrations did not differ among treatments in plasma, except copper, which was below the reported level. Mean liver P, K and Mg differed (P less than .05) due to treatments, while Zn, Co, Mo and Se were below the reported levels in the literature. Whole egg macrominerals and microminerals for the four treatments differed (P less than .05) due to treatment. Kidney mean K, Mg, Mn, Cu and Zn concentrations for the four treatments were all above reported levels. Mean muscle Mg concentrations for the four treatments were all above the reported level, while Fe and Zn concentrations were below the reported level. All macromineral and micromineral concentrations in spleen for the four treatments differed (P less than .05) due to treatments. It can be concluded that the inclusion of these aquatic plants at 7.5% level will not produce any adverse effect on concentrations of minerals in eggs or tissue of laying hens.
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