环模模孔参数对颗粒饲料加工质量及肉鸡生长性能的影响

发布时间：2019-03-06 17:19

【摘要】：本试验旨在研究环模模孔参数对颗粒饲料加工质量及肉鸡生长性能的影响。通过固定模孔直径(3mm)改变模孔长径比(6∶1、8∶1、10∶1)以及固定模孔长径比(10∶1)改变模孔直径(3.0、3.5、4.0mm),生产5种不同直径及硬度的肉鸡颗粒饲料。选取864只体重相近的21日龄爱拔益加(AA)肉鸡,随机分成6组,每个组8个重复,每个重复18只。Ⅰ~Ⅴ组分别饲喂模孔直径和长径比分别为3.0mm和6∶1、3.0mm和8∶1、3.0mm和10∶1、3.5mm和10∶1、4.0mm和10∶1的颗粒饲料;Ⅵ组分2阶段饲喂,22~35日龄饲喂模孔直径和长径比为3.0 mm和10∶1颗粒饲料,36~42日龄饲喂模孔直径和长径比为4.0mm和10∶1颗粒饲料。试验期21d。结果表明:1)模孔直径相同时,颗粒硬度随着模孔长径比的增加而极显著提高(P0.01);模孔长径比相同时,颗粒硬度随着模孔直径的增加而极显著提高(P0.01)。各组颗粒耐久性指数(PDI)无显著差异(P0.05),且都高于95%。2)模孔直径相同时,随着颗粒硬度的增加,肉鸡终末体重、平均日增重均逐渐降低,料重比逐渐升高。Ⅰ组的终末体重和平均日增重显著或极显著高于Ⅲ组(P0.05或P0.01),Ⅰ组料重比显著低于Ⅱ、Ⅲ组(P0.05)。3)模孔长径比相同时,各组终末体重、平均日增重和平均日采食量均无显著差异(P0.05);随着颗粒直径的增加料重比逐渐降低,且Ⅲ组料重比显著高于Ⅴ组(P0.05)。综上所述,模孔长径比和直径的增大均会显著提高颗粒硬度。在一定范围内,提高颗粒硬度会使肉鸡终末体重和平均日增重降低,料重比升高,而增大颗粒直径则会使料重比降低。
[Abstract]:The purpose of this experiment was to study the effects of ring mold pore parameters on the processing quality of pellet feed and the growth performance of broilers. The fixed hole diameter (3mm) and the fixed hole diameter ratio (10:1) were used to change the ratio of die hole length to diameter (6, 8, 10) and the diameter of die hole (3.0, 3.5, 4.0 mm). Five kinds of broiler pellet feed with different diameter and hardness were produced by changing the ratio of die hole length to diameter (6 渭 1, 8 渭 1, 10 渭 1) and fixed die hole diameter ratio (10:1). Eight hundred and sixty-four 21-day-old (AA) broilers with similar body weight were randomly divided into 6 groups with 8 replicas in each group. The diameter and the ratio of length to diameter of the molds in the 鈪，

本文编号：2435739