摘要
为研究不同比例辣椒秸秆青贮替代基础日粮中的玉米秸秆对肉牛生长性能、养分表观消化率及血清生化指标的影响,在3家养殖场分别选用体重、年龄相近的成年肉牛18头,分为6组,每组3头肉牛.对照组饲喂基础日粮,试验Ⅰ组、试验Ⅱ组、试验Ⅲ组、试验Ⅳ组分别按照25％、50％、75％和100％辣椒秸秆青贮替代基础日粮中的玉米秸秆饲料进行饲喂,饲喂周期90 d.结果表明:试验Ⅱ组的总增重、平均日增重、平均日采食量最高,料重比最低,其中总重量、平均日增重和平均日采食量分别较对照组提高40.99％、41.28％、19.50％(P＜0.05),干物质、粗蛋白质、中性洗涤纤维表观消化率和血清中的总胆固醇、血糖含量分别较对照组提高17.16％、15.10％、35.21％、14.87％、47.09％(P＜0.05);各组之间钙、磷表观消化率和血清中的总蛋白、白蛋白、球蛋白、尿素氮、谷丙转氨酶、甘油三酯差异不显著(P＞0.05).综上,将辣椒秸秆青贮后替代基础日粮中的玉米秸秆可明显促进肉牛食欲和提高生产性能,其中按50％比例替代效果最佳,可以显著提高营养物质中的干物质、粗蛋白质、中性洗涤纤维表观消化率,增加瘤胃微生物蛋白合成和血清白蛋白含量,不会对机体肝脏和肾脏功能造成损害.
Abstract
This study aimed to investigate the impact of replacing corn straw with various proportions of chili straw silage in the basic diet on the growth performance,nutrient digestibility,and serum biochemical indices of beef cattle.Eighteen adult beef cattle with similar weight and age were selected from 3 farms and divided into 6 groups with 3 beef cattle in each group.The control group was fed the basal diet,while trial groups Ⅰ,Ⅱ,Ⅲ and Ⅳ were fed diets with 25％,50％,75％and 100％chili straw silage as a substitute for corn straw,respectively.The feeding period lasted for 90 days.The results revealed that the total weight gain,average daily gain and average daily feed intake of trial group Ⅱ were the highest,and the ratio of feed to gain was the lowest.The total weight,average daily gain and average daily feed intake of trial group Ⅱ were increased by 40.99％,41.28％and 19.50％compared with control group,respectively(P＜0.05).The apparent digestibility of dry matter,crude protein,neutral detergent fiber and the contents of total cholesterol and blood sugar in serum were increased by 17.16％,15.10％,35.21％,14.87％and 47.09％compared with control group,respectively(P＜0.05).No significant differences were observed among the groups in terms of the apparent digestibility of calcium and phosphorus,as well as the serum levels of total protein,albumin,globulin,urea nitrogen,alanine aminotransferase,and triglyceride(P＞0.05).Overall,the results indicated that replacing corn straw with chili straw silage in the basal diet could effectively enhance the appetite and improve the production performance of beef cattle.The replacement at 50％demonstrated the most favorable effects,leading to significant improvements in the apparent digestibility of dry matter,crude protein,and neutral detergent fiber,thereby increasing rumen microbial protein synthesis and serum albumin content.Importantly,this dietary modification did not cause any damage to liver and kidney functions.
基金项目
黔农技推广"辣椒秸秆资源化综合利用研究与推广"项目()
NETL
NSTL
万方数据