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Another good method for gaining weight in pigs: adding organic acids to the diet
American scholars' recent research results have shown that adding 3% citric acid to feed and feeding early weaning piglets at 10 days of age can increase the average daily gain by 25 days (compared with the non-addition group) by 24.3%. The volume increased by 16.4%. Adding 1% citric acid to the diets of weaned piglets, the average daily weight gain increased by 5.2% over 14 days; adding 0.5% fumaric acid increased the average daily weight gain by 11.1% over 28 days, adding 1% fumaric acid and increasing the average daily weight gain. 9.5%. The mechanism by which organic acids are added to diets to increase weight is currently considered: (1) The pH of gastric juices is reduced, thereby allowing more pepsinogen to be converted to pepsin (activity situation). (2) Slowing down the emptying rate of the stomach, protein has a longer time for digestion. (3) It prevented the growth and reproduction of E. coli and other bacteria in the stomach and small intestine, and improved the utilization of feed. (4) Organic acids act as chelators, which increase the absorption of minerals in the back of the intestine. The amount of organic acid additives: citric acid should generally account for 1%-3% of total feed, fumaric acid accounts for 0.5%-1% of total feed. Han Liangcai (Jiangsu Hongze County Veterinary Station)