Effects Of Dietary Arginine And Lysine On Growth And Blood Biochemical Indicator In Broilers

This paper mainly was to investigate the effects of different Arginine and Lysine levels in dietarys on growth performance, slaughter performance and blood biochemical indexes in broilers.Experiment 1 672 one day-old AA broilers were divided into 6 treatments with 8 replications of 14-chickens per replications. The trial was divided into two stage of 0-21 day-old and 22-42 day-old. At each phases ,Lys was set up at two levels according to NRC Recommendation (1994) and Breed Standards. In each level of Lysine, Arginine and Lysinine 3 ratios, 1:1, 1.2:1, and 1.4:1, respectively. The other nutrients refer NRC standard (1994) . Broilers were weighted at 8:00 am of 7, 14, 21 and 42 days old and feed intake was recorded at the same time. The results showed that different levels of arginine and aysine significantly effected on the production of broilers. At 0~21 d-old, BWG of the broilers is largest in the treatment of higher rate of arginine and lysine, while BWG is smallest in the treatment of lower rate of arginine and lysine. Compared with the treatment of lower rate of arginine and lysine, BWG of the broilers in the treatment of higher rate of arginine and lysine were increased by 9.81%(P<0.05). The different levels of arginine and lysine in the dietary significantly effected on the F/G of the chicken. The treatment of the highest rate of arginine and lysine is best, while the treatment of the lowest rate of arginine and lysine is worst. F/G of the treatment of the highest rate of arginine and lysine were decreased by 7.54% than the treatment of the lowest rate of arginine and lysine. At 22~42d-old, BWG of broilers in every treatment were increased progressively in proper order. BWG of the broilers is largest in the treatment of the highest rate of arginine and lysine, while BWG is smallest in the treatment of the lowest rate of arginine and lysine. Compared with the treatment of the lowest rate of arginine and lysine, BWG of the broilers in the treatment of the highest rate of arginine and lysine were increased by 9.33%(P<0.05). The different levels of arginine and lysine in the dietary significantly effected on the F/G of the chicken. The treatment of higher rate of arginine and lysine is best, while the treatment of lower rate of arginine and lysine is worst. F/G of the treatment of the highest rate of arginine and lysine were decreased by 13.28%(P<0.05) than the treatment of the lowest rate of arginine and lysine.Experiment 2 The same diets were formulated as experiment 1. At 21 day-old and 42 day-old, broilers close to the average weight were selected and killed by carotid artery blood, then removed the feathers. The broilers weight of carcass, eviscerated weight, breast muscle weight and thigh muscle weight were recorded. The results showed that the arginine and lysine levels of dietary significantly effected on the 0-21 d-old broiler's carcass weight, eviscerated weight, eviscerated rate, thigh muscle weight, breast muscle weight, breast muscle rate of 21 days old broiler.The effect on slaughter rate and thigh muscle ratio is not apparent, but still showed the increasing tendency. Adding arginine and lysine to the dietary significantly effected on eviscerated rate,breast muscle weight, breast muscle rate and thigh muscle weight of 22~42 d-old, while the effect on slaughter weight,slaughter rate,eviscerated rate and thigh muscle ratio is not remarkable.Experiment 3 This trial was designed according to experiment1.At 7 day-old, 14 day-old, 21 day-old and 42 day-old, two broilers close to same weight of each repetition were selected and sampled for preparing the serum and plasma. The contents of urea nitrogen, total protein, albumin and creatinine in serum, triglyceride, total cholesterol, low density lipoprotein cholesterol and high density lipoprotein cholesterol in serum were measured by automatic biochemical analyzer. The results showed that different arginine and lysine levels levels in diets could increase the total protein and albumin in serum, but decrease the triglyceride, total cholesterol and low density lipoprotein cholesterol in plasma for broilers.The results showed that the growth performance,slaughter performance and the blood lipids were the best when the argine and lysine ratio was 1.4:1.