發(fā)布時間：2019-03-06 17:19

【摘要】：本試驗旨在研究環(huán)模�？讌�(shù)對顆粒飼料加工質(zhì)量及肉雞生長性能的影響。通過固定�？字睆�(3mm)改變模孔長徑比(6∶1、8∶1、10∶1)以及固定�？组L徑比(10∶1)改變�？字睆�(3.0、3.5、4.0mm),生產(chǎn)5種不同直徑及硬度的肉雞顆粒飼料。選取864只體重相近的21日齡愛拔益加(AA)肉雞,隨機分成6組,每個組8個重復,每個重復18只。Ⅰ~Ⅴ組分別飼喂�？字睆胶烷L徑比分別為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的顆粒飼料;Ⅵ組分2階段飼喂,22~35日齡飼喂模孔直徑和長徑比為3.0 mm和10∶1顆粒飼料,36~42日齡飼喂�？字睆胶烷L徑比為4.0mm和10∶1顆粒飼料。試驗期21d。結(jié)果表明:1)模孔直徑相同時,顆粒硬度隨著�？组L徑比的增加而極顯著提高(P0.01);模孔長徑比相同時,顆粒硬度隨著�？字睆降脑黾佣鴺O顯著提高(P0.01)。各組顆粒耐久性指數(shù)(PDI)無顯著差異(P0.05),且都高于95%。2)模孔直徑相同時,隨著顆粒硬度的增加,肉雞終末體重、平均日增重均逐漸降低,料重比逐漸升高。Ⅰ組的終末體重和平均日增重顯著或極顯著高于Ⅲ組(P0.05或P0.01),Ⅰ組料重比顯著低于Ⅱ、Ⅲ組(P0.05)。3)�？组L徑比相同時,各組終末體重、平均日增重和平均日采食量均無顯著差異(P0.05);隨著顆粒直徑的增加料重比逐漸降低,且Ⅲ組料重比顯著高于Ⅴ組(P0.05)。綜上所述,模孔長徑比和直徑的增大均會顯著提高顆粒硬度。在一定范圍內(nèi),提高顆粒硬度會使肉雞終末體重和平均日增重降低,料重比升高,而增大顆粒直徑則會使料重比降低。
[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，

本文編號：2435739