摘要
本文旨在研究低能量水平的玉米-豆粕型饲粮中添加不同非淀粉多糖（NSP）复合酶对肉鸡生长性能、消化道生理、屠宰性能、肠道微生物数量及经济效益的影响,以确定适宜的NSP复合酶.试验采用单因子完全随机设计,选取900只1日龄的科宝肉公鸡,按体重无差异原则随机分为5个组,正对照组（PC组）饲喂正常能量水平的基础饲粮;负对照组（NC组）饲喂在PC组饲粮的基础上降低270 kJ/kg能量水平的饲粮;NSP复合酶组饲喂在NC组饲粮中分别添加NSP复合酶1（300 g/t）、NSP复合酶2（300 g/t）、NSP复合酶3（500 g/t）的饲粮,每个组10个重复,每个重复18只鸡.试验分为前期（1 ～21 d）、后期（22 ～42 d）2阶段进行.结果表明：1）与PC组相比,NC组第21天平均体重与1～21 d平均体增重均显著降低（P＜0.05）,与NC组相比,NSP复合酶组第21天的平均体重与1～21 d的平均体增重均显著提高（P＜0.05）;与PC组相比,NC组1～21 d和1～42 d的料重比均显著提高（P＜0.05）,与NC组相比,NSP复合酶组1 ～21 d和1～42 d料重比均显著降低（P＜0.05）.2）各组间第21和42天的腺胃、十二指肠、空肠、回肠、盲肠相对重量差异均不显著（P＞0.05）;与PC组相比,NC组第21天的肌胃相对重量显著提高（P＜0.05）,第42天的肌胃相对重量有提高的趋势（P＞0.05）,添加NSP复合酶后肌胃相对重量均有降低.与PC组相比,NC组第21天的空肠、回肠、盲肠相对长度都有所提高,但只有盲肠相对长度差异达显著水平（P＜0.05）;各组间第42天各肠段相对长度均无显著差异（P＞0.05）.3）与PC组相比,NC组第21天的空肠、回肠绒毛高度均有增加,其中回肠绒毛高度差异达显著水平（P＜0.05）;与PC组相比,NC组的十二指肠、空肠和回肠的肌层厚度均有增加,NSP复合酶3组的十二指肠肌层厚度显著提高（P＜0.05）.各组间第42天各段肠道形态指标差异均不显著�
This experiment was conducted to investigate the effects of dietary different non-starch polysaccharide （NSP） complex enzymes on growth performance,digestive tract physiology,carcass performance,the number of intestinal microorganism and economic efficiency of broilers fed corn-soybean meal diets.A total of 900 Cobb male broilers aged 1 day were randomly assigned to 5 groups.A positive control group （PC group） was fed a basal diet with normal energy level,and a negative control group （NC group） was fed a diet with a lower energy level （270 kJ/kg metabolizable energy reduction from PC group diet）.Other three complex enzyme groups were fed the NC group diets added with NSP complex enzyme 1 （300 g/t）,NSP complex enzyme 2 （300 g/t） and NSP complex enzyme 3 （500 g/t）,respectively.This experiment included 2 periods,early period （1 to 21 d） and later period （22 to 42 d）.The results showed as follows：1） compared with PC group,the average body weight on 21 d and average body weight gain from 1 to 21 d in NC group were significantly decreased （P 〈 0.05）.Compared with NC group,the average body weight on 21 d and average body weight gain from 1 to 21 d in complex enzyme groups were significantly increased （P 〈 0.05）.Compared with PC group,the feed/gain from 1 to 21 d and 1 to 42 d in NC group was significantly increased （P 〈0.05）,and compared with NC group,the feed/gain from 1 to 21 d and 1 to 42 d in complex enzyme groups was significantly decreased （P 〈 0.05）.2） There was no significant difference in the relative weight of glandular stomach,duodenum,jejunum,ileum and cecun on 21 d and 42 d among all groups （P 〉0.05）.Compared with PC group,the relative weight of muscular stomach in NC group was significantly increased on 21 d （P 〈 0.05） and was tended to be improved on 42 d （P 〉 0.05）,but the relative weight of muscular stomach in complex enzyme groups was decreased （P 〉 0.05）.Compared with PC group,the relative length of jejunum,ileum
出处
《动物营养学报》
CAS
CSCD
北大核心
2013年第10期2459-2473,共15页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
安迪苏生命科学制品(上海)有限公司合作项目
四川农业大学双支团队资助
