Effect Of Different Concentrate To Forage Ratio On Nutrient Digestion And Metabolism Of Aged One And Two-year-old Yanqi Horse

In this experiment, the Mongolian Autonomous Prefecture Bayinguoleng baoqi stud farm of Yanqi horse for the study. By research the different concentrate to forage ratio on the digestion and metabolism of aged one and two-year-old Yanqi horse, which made the Yanqi horse on the main dietary nutrient requirements for aged one and two-year-old Yanqi horse breed science provide a theoretical basis.Experiment 1: Effect of different concentrate to forage ratio on nutrient digestion and metabolism of aged one-year-old Yanqi horse. Select twelve Yanqi horse, yearling, male and weight 191±20 kg on average. The horse was divided into two groups(each group 6), used the method of the design process of staging packet. To carry out the digestion metabolism studies, they were fed with concentrate to forage ratio of 9:91,16:84,22:78,29:71 diet. The pre-trial period was 15 d and the time of the experiment was 6 d. The experiment results showed that, with the increase of dietary concentrate to forage ratio, compared with the 9:91 ratio of concentrate to forage diet, the concentrate to forage ratio dietary crude protein intake of the other three groups were increased by 12.42%(P>0.05),26.47%(P<0.05),30.46%(P<0.05); The amount of protein digestion increased by 14.43%(P>0.05),36.22%(P<0.05),45.89%(P<0.05); The amount of nitrogen retention in the body increased by 19.15%(P>0.05),21.28%(P>0.05),34.04%(P>0.05). With the increase of dietary concentrate to forage ratio, the energy intake was on the rise(P>0.05); compared with the 9:91 ratio of concentrate to forage diet, the concentrate to forage ratio dietary digestible energy of the other groups increased by 6.54%(P>0.05),8.85%(P>0.05),10.38%(P>0.05); metabolizable energy were increased by 13.10%(P>0.05),8.73%(P<0.05),17.03%(P<0.05). With the increase of dietary concentrate to forage ratio, compared with the 9:91 ratio of concentrate to forage diet, the concentrate to forage ratio dietary calcium of the other groups were increased by 12.23%(P<0.05),26.33%(P<0.05),48.44%(P<0.05); the intake of phosphorus increased significantly(P<0.01); with the increase of dietary concentrate to forage ratio, the amount of calcium phosphorus digestion and retention increased(P<0.05). The results show that, when the one-year-old Yanqi horse crude protein intake was 843 g/d, the horse suitable requirement for protein was 566 g/d. When the one-year-old Yanqi horse intake energy was 196 MJ/d, the horse suitable requirement for energy was 144 MJ/d. It could not meet the nutrient requirements to the horse when the calcium intake was 11-12 g/d. It could meet the nutrient requirements to the horse when the phosphorus intake was 22-26 g/d.Experiment 2: Effect of different concentrate to forage ratio on nutrient digestion and metabolism of aged two-year-old Yanqi horse. Select twelve Yanqi horse, two years old, male and weight 254±14 kg on average. The horse was divided into two groups(each group 6), used the method of the design process ofstaging packet. To carry out the digestion metabolism studies, they were fed with concentrate to forage ratio of 10:90,15:85,20:80,25:75 diet. The pre-trial period was 15 d and the time of the experiment was 6 d. The experiment results showed that, with the increase of dietary concentrate to forage ratio, compared with the 10:90 ratio of concentrate to forage diet, the concentrate to forage ratio dietary crude protein intake of the other three groups were increased by 9.19%(P>0.05),12.71%(P<0.05),13.43%(P<0.05), 9.19%(P>0.05),12.71%(P<0.05),13.43%(P<0.05); The amount of protein digestion increased by 12.61%(P>0.05),8.52%(P>0.05),20.77%(P>0.05); The amount of nitrogen retention in the body increased by 7.02%(P>0.05),5.26%(P>0.05),29.82%(P>0.05). With the increase of dietary concentrate to forage ratio, the energy intake lower(P>0.05); compared with the 10:90 ratio of concentrate to forage diet, the concentrate to forage ratio dietary digestible energy of the other groups increased by 4.35%(P>0.05), 3.99%(P>0.05),5.43%(P>0.05); metabolizable energy were increased by 8.52%(P>0.05),13.90%(P>0.05), 23.32%(P>0.05). With the increase of dietary concentrate to forage ratio, compared with the 10:90 ratio of concentrate to forage diet, the concentrate to forage ratio dietary calcium of the other groups were increased by 15.70%(P<0.05),13.31%(P<0.05),24.47%(P<0.05); the intake of phosphorus increased by 21.94%(P<0.05),25.52%(P<0.05),42.0%(P<0.05); with the increase of dietary concentrate to forage ratio, the amount of calcium phosphorus digestion and retention increased(P<0.05). The results show that, when the two-year-old Yanqi horse crude protein intake was 972 g/d, the horse suitable requirement for protein was 688 g/d. When the two-year-old Yanqi horse intake energy was 196 MJ/d, the horse on suitable energy requirement was 144 MJ/d. It could meet the nutrient requirements to the horsewhen the Calcium intake was 29-33 g/d and phosphorus intake was 22-26 g/d.