Abstract
Simple SummaryThe effects of the zinc and fibre source in piglets’ diet on their bone mineral content, density, and strength parameters were investigated using diets supplemented with lignocellulose or potato fibre combined with mineral and organic sources of zinc. The intake of digestible zinc and the zinc content in the blood serum were positively correlated with the measured bone parameters. In conclusion, the bone parameters were affected more strongly by the organic than inorganic source of zinc.The effects of the zinc and fibre source in piglets’ diet on the bone mineral content, density, and strength parameters of the femur were investigated using 24 piglets fed a diet supplemented with either lignocellulose (LC) or potato fibre (PF). Half of each group of piglets consumed a diet with ZnSO4 monohydrate or with zinc glycinate (ZnGly). The diets contained similar amounts of lysine, energy, and fibre. Bone mineral content and density were over 9% higher in pigs receiving diets with ZnGly than in animals fed diets with ZnSO4. Moreover, ZnGly strongly improved maximum and elastic strength (by 25.7 and 20.0%, respectively, p < 0.0001) and bone stiffness (by 29.4%, p < 0.0001). Only the mass of the femur was affected by the type of fibre in the diet, as the femurs of piglets fed diets with LC were over 7% (p < 0.0001) heavier than in piglets fed diets with PF. The intake of digestible zinc and the zinc content in the blood serum were positively correlated with the measured bone parameters and, depending on the parameter, “r” ranged from 0.749 to 0.866 and from 0.400 to 0.479, respectively. It can be concluded that bone parameters are affected more strongly by the organic than inorganic source of zinc.
Highlights
Piglets fed the diet supplemented with zinc glycinate consumed more total Zn and tended to consume more digestible Zn as compared to animals fed the diet with ZnSO4 (Table 3)
Zn may exert an impact on the normal physiological action of vitamin D in calcium metabolism and interfere with the anabolic activity of vitamin D in bone tissue [5]
The results of the present study demonstrated that the digestible zinc consumption was higher when the diet was supplemented with potato fibre
Summary
As an abundant essential trace element, performs multifarious physiological roles and, as a component of many metalloenzymes, is involved in almost every metabolic pathway in the animal [1]. Zinc is needed to produce the matrix of collagen protein threads upon which the boneforming calcium–phosphorus compound is deposited. It acts as a co-factor in over 200 enzymatic reactions involved in carbohydrate, protein, and lipid metabolism [3]. Zinc influence the normal physiological action of vitamin D on calcium metabolism and interfere with the anabolic activity of vitamin D on bone tissue [5]. Zinc stimulates food intake through the afferent vagus nerve followed by activating the hypothalamic peptides (orexin and neuropeptide Y)
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