在不同类型饲粮中添加复合酶制剂GSM对肉鸡生长的影响

发布时间：2018-07-10 18:02

本文选题：玉米 + 小麦　；参考：《湖南农业大学》2015年硕士论文

【摘要】：本试验用玉米-豆粕型和小麦-豆粕型两种饲粮饲喂AA肉鸡,研究不同类型饲粮在减少代谢能时添加GSM,对肉鸡生产性能、回肠末端养分消化率和回肠食糜相对粘度的影响,来探究GSM的适宜添加量以及比较GSM在不同类型饲粮中对肉鸡的作用,为生产中合理利用GSM节约能量饲料提供依据。试验选用健康的1日龄AA肉鸡1296只,随机分为12个组,每个组9个重复,每个重复12只鸡,公母各半,各重复仔鸡初始体重无显著差异(P0.05)。在第1-12组中,第1-6组饲喂玉米-豆粕型饲粮,第7-12组试鸡饲喂小麦-豆粕型饲粮,同时,第1-6组饲粮分别为：第1组为正常能量水平的基础饲粮(饲养分为两阶段,饲粮代谢能分别为12.35MJ/kg和12.77MJ/kg)；第2组和第3组分别为在基础组饲粮上减0.314 MJ/kg和0.628 MJ/kg代谢能的低能量饲粮；第4、5和6组在第3组的基础上分别添加300g/t·GSM、600g/t·GSM、300g/t·GSM+500g/t·乳化剂。第7-12组饲粮分别为：第7组为正常能量水平的基础饲粮组(两阶段饲粮代谢能分别为：12.35MJ/kg和12.77MJ/kg)；第8组和第9组分别为在基础组饲粮上减0.314 MJ/kg和0.628 MJ/kg代谢能的低能量饲粮；第10、11和12组是在第9组的基础上分别添加300g/t·GSM、600g/t·GSM、300g/t·GSM+500g/t·乳化剂,试验全期为42 d。试验第22 d和第43 d以重复为单位,空腹称重,称剩料重,计算阶段体增重(BWG)、采食量(FI)和料重比F/G；试验44 d时,第3、4、6、9、10和12组每组随机选取5只肉鸡,颈部放血致死后脱毛开膛,取出肠道,结扎回肠,取出食糜,一部分食糜于-20℃冰冻保存用于测定回肠末端养分消化率及能量利用率,一部分用于测定回肠食糜相对粘度。试验结果表明：(1)在玉米-豆粕型饲粮中,与正常代谢能组相比,降低饲粮代谢能并添加GSM对肉鸡的生产性能并无改善(P0.05)；在小麦-豆粕型饲粮中,降低饲粮0.628 MJ/kg代谢能并添加600g/t·GSM组能达到与正常代谢能组相当的生产性能(P0.05)且其与第9组相比试鸡全期平均体增重增加2.1%,采食量降低2.4%,料重比降低4.9%。(2)在玉米-豆粕型饲粮中添加GSM对肉鸡回肠食糜相对粘度无显著影响(P0.05)；在小麦-豆粕型饲粮中添加GSM极显著降低回肠食糜相对粘度,降低水平约8.0%(P0.001)。(3)在玉米-豆粕型饲粮中添加GSM对肉鸡回肠末端养分消化率影响无明显作用(P0.05)；在小麦-豆粕型饲粮中添加GSM对肉鸡回肠末端养分消化率和表观代谢能均具有不同程度的改善作用,其中添300g/t·GSM+500g/t·乳化剂能够极显著提高回肠末端粗蛋白、磷的消化率(P0.01),提高水平约为：5.5%和0.6%。(4)通过经济效益分析,添加600g/t·GSM产生的经济效益最好。综合结果表明：在小麦-豆粕型饲粮中添加GSM能显著降低肠道食糜粘度,改善部分养分消化率,从而提高肉鸡生产性能,而在玉米-豆粕型饲粮中的效果不显著；小麦-豆粕型饲粮降低0.628 MJ/kg饲粮代谢能同时添加600g/T·GSM能达到正常代谢能组相当的生产性能且产生的经济效益最好,同时GSM与乳化剂联用效果优于单一使用GSM的效果。
[Abstract]:In this experiment, AA broilers were fed with two kinds of corn soybean meal type and wheat soybean meal type diet. The effects of different types of dietary supplemental GSM on the production performance of broilers, the nutrient digestibility of the ileum and the relative viscosity of the ileum were studied in order to explore the appropriate amount of GSM and to compare the effect of GSM on Broilers in different types of diets. In order to provide the basis for the rational use of GSM energy saving feed in production, 1296 healthy 1 day old AA broilers were randomly divided into 12 groups, each group was repeated 9 repetitions, each repeated 12 chickens, the male parent was half, and the initial weight of the repeated broilers had no significant difference (P0.05). In group 1-12, the 1-6 group was fed corn soybean meal type and 7-12 group. The chickens were fed with wheat - soybean meal, and the 1-6 group of the 1-6 groups were as follows: the first groups were the basal diet of the normal energy level (the feeding was divided into two stages, the diet metabolism was 12.35MJ/kg and 12.77MJ/kg respectively); the second and third groups were low energy diets with 0.314 MJ/kg and 0.628 MJ/kg metabolic energy on the basal diet; 4,5 and 6 respectively. On the basis of the third groups, 300g/t. GSM, 600g/t GSM, 300g/t GSM+500g/t / emulsifier were added respectively. The 7-12 group was divided into seventh groups for the normal energy level of the basal diet group (the two stage of diet metabolism was respectively 12.35MJ/kg and 12.77MJ/kg), and the eighth and ninth groups were 0.314 MJ/kg and 0.628 in the basal diet, respectively. The low energy diet of MJ/kg metabolism; 10,11 and 12 groups were added 300g/t GSM, 600g/t. GSM, 300g/t. GSM+500g/t. Emulsifier on the basis of group ninth. The test was 42 D. test twenty-second D and forty-third d to repeat the unit, the weight of the empty stomach, the weight gain of the calculation stage (BWG), the feed intake and the ratio of feed weight, and the test 44 In group 3,4,6,9,10 and 12, 5 broilers were randomly selected in each group. After the neck bleed to death, the skin was unhairing, the intestine was removed, the ileum was ligated and the chymus was ligated. Some chymodies were frozen at -20 C to determine the nutrient digestibility and energy utilization of the ileum, and some were used to determine the relative viscosity of the ileum. The experimental results showed: (1) jade (1) In the rice soybean meal diet, compared with the normal metabolic energy group, reducing the metabolic energy of the diet and adding GSM did not improve the production performance of the broiler (P0.05). In the wheat soybean meal diet, the reduction of 0.628 MJ/kg metabolism energy and the addition of 600g/t. GSM group could reach the equivalent production performance (P0.05) with the normal metabolic energy group (P0.05). The average body weight gain increased by 2.1%, the feed intake was reduced by 2.4%, and the feed weight ratio decreased by 4.9%. (2) in the corn soybean meal diet with GSM (P0.05). The addition of GSM to the wheat soybean meal diet decreased the relative viscosity of the ileum, and decreased by about 8% (P0.001). (3) in corn soybean meal (3) The effect of adding GSM on the nutrient digestibility of the terminal ileum was not significantly affected (P0.05), and the addition of GSM to the wheat soybean meal diet had different effects on the nutrient digestibility and apparent metabolic energy at the end of the ileum of broilers, and the addition of 300g/t. GSM+500g/t milk chemicals could significantly increase the crude protein at the end of the ileum. The level of phosphorus digestibility (P0.01) is about: 5.5% and 0.6%. (4), through economic benefit analysis, the economic benefit of adding 600g/t. GSM is the best. The comprehensive results show that adding GSM in wheat soybean meal can significantly reduce the viscosity of intestinal chimy, improve the digestibility of some nutrients, and improve the performance of broiler, and in corn soybean meal. The effect of the grain diet was not significant. The reduction of 0.628 MJ/kg diet by wheat soybean meal diet can also add 600g/T GSM to the normal metabolic energy group, which can achieve the best production performance and the economic benefit is best. At the same time, the combination effect of GSM and emulsifier is better than the single use of GSM.
【学位授予单位】：湖南农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S831.5

【相似文献】