Effects of energy concentration and duration of feeding on the response of broiler chicks to growth promoters 1
Effects of energy concentration and duration of feeding on the response of broiler chicks to growth promoters 1
复制标题
能量浓度和饲喂时间对肉鸡对生长促进剂反应的影响1
DOI：
10.1080/00071669208417547
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发表时间：
1992
影响因子：
2
通讯作者：
I. Bartov
中科院分区：
文献类型：
--
作者：
I. Bartov
1.以7日龄至49日龄公鸡为试验对象，进行了两个试验(试验一)和两个试验(试验二)，以评价生长促进剂(GPs，20 mg/kg)、杆菌素锌(BAC，25 mg/kg)、硝酸锌(Nit，18 mg/kg)和日粮能量浓度(EC)对肉仔鸡生产性能、营养物质利用率、去脏肉仔鸡产量和各脏器大小的影响。2.与BAC和NIT相比，AVO显著(P<；0-05)降低了脂肪排泄量，提高了干物质、脂肪和氮的存留率、饲料中的氨基酸含量、增重和食物效率。AVO还能显著减小肝脏和小肠的大小、长度和比重。BAC和NIT对SI变量的影响不如AVO显著。虽然AVO在提高脂肪沉积、生长和食物效率方面的作用在高EC日粮中更为明显，但无论是脂肪沉积、生长还是食物效率都不是很高。
Abstract 1. Two experiments were carried out with male broiler chicks from 7 to 49 d of age to evaluate the combined effect of the growth promoters (GPs) avoparcin (AVO, 20 mg/kg), Zn bacitracin (BAC, 25 mg/kg) and nitrovin (NIT, 18 mg/kg), and dietary energy concentration (EC) (experiment 1) and the effect of age of feeding AVO (experiment 2) on performance, utilisation of dietary nutrients, yield of defeathered eviscerated carcases (DEC) and size of various organs. 2. AVO, in contrast to BAC and NIT, significantly (P<0–05) decreased fat excretion and increased dry matter, fat and nitrogen retention, dietary AMEn content, weight gain and food efficiency. AVO also significantly decreased the size of the liver and the small intestine (SI), the length of the SI and its specific weight. The effect of BAC and NIT on the variables of the SI was less pronounced than that of AVO. Although the effect of AVO on increasing fat retention, growth and food efficiency was more pronounced with the high EC diet, neither ...