EFFECT OF FEED ADDITIVE DHQEC ON INDICATORS OF ANTIOXIDANT STATUS IN FATTENING PIGS
Abstract
World consumption of pork is steadily increasing, with the growing demand for pork being met by increasing both the number of pigs and their slaughter weight. However, pork production faces negative factors leading to the development of oxidative stress, which does not allow the genetic potential of the breeds to be fully realised. Particular attention is paid to the post-weaning period in pigs, when they are exposed to numerous stresses, with low adaptive capacity. This is an important period in pig rearing as it is often accompanied by temporary low feed intake, poor growth, intestinal dysbiosis and diarrhoea after weaning. These factors pose a threat to animal health and welfare, increasing the risk of mortality and leading to significant economic losses. For many years the problem of oxidative stress has been solved by the use of zinc oxide in the diets of weaned piglets. The use of natural antioxidant additives in pig diets is becoming more and more relevant in pig breeding practice. Natural antioxidants include ascorbic acid (vitamin C), tocopherol (vitamin E) and dihydroquercitin. The aim of our research was to create and test a feed complex with the additive properties of antioxidants and vitamins. We developed a new feed complex of Dihydroquercetin (DHQ) with vitamins E and C (DHQEC), which was fed to boars at a dose of 0.025% of the basic diet during the whole period of fattening. The concentration of reduced glutathione (GSH) in the blood serum of experimental animals was found to be significantly higher (p<0.1) by 12.5% at the end of the study compared with the control group. There was also a dynamics of oxidized glutathione concentration (GSS) decrease in experimental group animals, as well as a significant increase (p<0.05) of reduced to oxidized glutathione (GSH/GSS) ratio by 45,9%. The concentration of malonic dialdehyde (MDA) was reliably lower (P<0.05) by 33,6% in comparison with the control group, while the level of superoxide dismutase (SOD) activity was 48.2% higher in the period before slaughter (p<0,1) in experimental group. The main effect of feeding DHQEC in mixed fodders was evident in the improvement of average daily live weight gain (ADG), including at the beginning of the experiment, the 1st week (p<0.10), and in the first period of fattening (5-8 weeks, p=0.09; 8 weeks, p<0.05). These indices testify to effective action of antioxidants and promote reactivity of organism and stress resistance, which raises the indices of productivity.
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Список литературы
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Wuryastuti, H., Stowe H.D., Bull R.W., Miller E.R. Effects of vitamin E and selenium on immune responses of peripheral blood, colostrum, and milk leukocytes of sows. J AnimSci., 1993, no. 71, pp. 2464-2472.
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