【作者】 贠丽娟；

【导师】 姚军虎；

【作者基本信息】 西北农林科技大学 ， 动物营养与饲料科学， 2004， 硕士

【摘要】 仔猪生产是养猪业的关键问题。为降低仔猪腹泻率，改善饲料适口性，降低生产成本，本研究在仔猪饲料中添加蔗糖，测定其生产性能、血糖水平和养分的表观消化率，为生产实践提供理论依据。研究分为三部分：试验一、二为饲养试验，试验三为消化试验。试验一选择48头健康仔猪(杜×长×大)，平均体重17.56kg。随机分为四个处理，每个处理3个重复（栏），每重复4头仔猪。通过调整乳清粉与蔗糖含量，设计主要营养成分含量相同的三种日粮，再通过增加酸化剂或酶制剂的办法，降低10%日粮CP和主要氨基酸水平，设计第四种日粮。筛选最优配方。试验二选择45头健康仔猪(杜×长×大)，随机分为三个处理，每个处理3个重复（栏），每重复5头仔猪。以试验一的结果为基础设计营养水平相同的三种日粮，A组为对照组，添加3%乳清粉+3%蔗糖；B组用3%蔗糖替代3%的乳清粉，即6%蔗糖；C组日粮中用1%鱼粉替换A组的玉米蛋白粉和膨化大豆。筛选最优饲料配方。试验三采用全收粪法，在试验二的饲养试验结束后，从每处理组随机挑选三头仔猪，采用五天连续收粪法，测定三种日粮的能量和蛋白质的表观消化率。结论：1、饲喂含蔗糖饲料仔猪食欲旺盛，采食速度快，且随蔗糖添加量的增加，采食量趋于增加(P>0.05)。2、相同营养水平下，用3%蔗糖替代2%～3%乳清粉趋于改善仔猪的生长性能，并降低饲料成本。3、增加酸化剂和复合酶制剂的用量，可降低10%左右的日粮粗蛋白质和主要氨基酸含量，并趋于提高日增重、降低饲料成本、减少仔猪腹泻率。4、日粮基本结构及营养水平相同的情况下，日粮组成对断奶仔猪干物质、粗蛋白质及总能的表观消化率无明显影响(P>0.05)。更多还原

【Abstract】 To investigate the effect of cane sugar in the diet on performance，feed intake，nutrient digestibility and blood sugar of weaned pigs，two growth trials and one digestibility trial were conducted. In the first experiment，48 crossbred weaned pigs ( average initial weight 17.56kg ) were divided into 4 groups，3 replicates each group. The 3 diets were designed with the same nutrient ingredients. The last diets were formed by supplementation of compound enzyme addition and acidifier addition，reduced approximately 10% crude protein (CP) level and main essential amino acids (EAA).The 4 diets were assigned to 4 groups. The experiment lasted 28 days. In term of the results， 3 diets were designed in the second growth trial.45 crossbred weaned pigs aged 35 days were divided into 3 diets，3 replicates each group. Experiment 3 was a digestibility trial conducted to determine the apparent digestibility of dry matter，gross energy and dietary CP of pigs fed the 3 diets in the second experiment. The results showed:1. Pig fed the diets containing cane sugar ate faster than ever. Cane sugar would tend to increase feed intake.2. With the same nutrient ingredients， 3% sugar replaced 2%～3% dried whey addition would tend to reduce the cost of ingredients and improve piglets’ performance.3. The diets containing supplementation of compound enzyme and acidifier，can reduce about 10% CP and EAA and improve the daily gain and decrease diarrhea rate.4. With the same nutrient ingredients，the diets had no effect on the apparent digestibility of dry matter， gross energy and dietary CP.更多还原