1.Research on the effects of organic zinc on animal growth performance
It was found that adding amino acid complex zinc can significantly increase the daily weight gain and feed intake of weaned piglets. It is appropriate to add Zn-Met 80mg/kg. The effect is not significant when adding less than this amount (40mg/kg); Zn-Met and Asanic acid has a synergistic effect, and combined application can increase the daily weight gain and feed intake of pigs. Other studies have shown that when the total zinc is 100 mg/kg, the organic zinc content accounts for 40% of the total zinc is optimal.
Zn-Met increases the nitrogen deposition in sheep, and the bioavailability is 6.8% higher than that of ZnO. Zn-Met can promote wool growth and improve the daily life of sheep. Weight gain and immunity. Zn-Met can improve the performance digestibility of poultry feed, improve eggshell quality, improve immunity, reduce skin tears, increase breast meat production, and promote feather growth.
2. Organic zinc improves animal carcass quality
Greene (1998) conducted a study on the effect of Zn-Met on ruminant carcass quality. Among the 7 trials, 3 trials reported that the carcass quality grade, marbling score and fat mass around the kidney, pelvis and heart of cows and steers in the Zn-Met group were higher than those in the ZnO group with the same amount of zinc. Harganto (1994) found that the addition of Zn-Met reduced the fat content of psoas muscle and increased the carcass lean meat rate.
3. Effects of organic zinc on stress, immunity and disease resistance
Zn-Met can reduce cattle transportation stress and Low calcium (0.3%) stress in laying hens has a significant effect. In a test comparing the effects of Zn-Met on animal immune function, Nockels (1991) found 4 reports that Zn-Met could improve the immunity of chicks, weaned piglets and sheep compared with the same amount of ZnO. It was also reported that the control group’s diet contained 26 mg/kg of organic zinc, and 25 mg/kg of Zn-Met was added to this, and the incidence rate during the 28-day study period was very low.
Measurement of antibody titers in blood on days 0 and 14 as responses to herpes virus-1 (BHV-1) and parainfluenza 3 (PI-3) The results of the immune response measurement of vaccination showed that the antibody titer of BHV-1 in the Zn-Met group was 47% and 31% higher than that of the control group and ZnO group 14 days after vaccination, respectively. When calves were fed a control diet and Zn-Met was added to the control diet to a level of 360 mg organic zinc/head/day, the weight gain of calves in the Zn-Met supply group increased by 10.7% (0.704 and 0.636 kg /day), the incidence rate was reduced (46:31%), and the amount of drug treatment was reduced by 5.8% (2.12:2.25).
