摘要
本试验旨在研究饲粮烟酸添加水平对五龙鹅生长性能、屠宰性能及养分表观利用率的影响。选择1日龄五龙鹅360只，随机分为6个组，每组6个重复，每个重复10只鹅。Ⅰ组为对照组，饲喂基础饲粮（烟酸含量：1～4周龄为25．54 mg/kg，5～16周龄为23．48 mg/kg），试验组分别在基础饲粮中添加20、40、60、80、100 mg/kg的烟酸。试验期16周。结果表明：1）与对照组相比，饲粮添加60 mg/kg烟酸时，1～4周龄鹅料重比极显著降低（ P＜0．01），各组1～4周龄鹅平均日增重差异不显著（ P＞0．05）。与对照组相比，饲粮添加40 mg/kg烟酸显著和极显著降低5～8周龄、9～16周龄鹅料重比（P＜0．05和P＜0．01）。2）与对照组相比，饲粮添加60 mg/kg烟酸极显著提高4周龄鹅的屠宰率、半净膛率、全净膛率（ P＜0．01），各组4周龄鹅的腿肌率和胸肌率差异不显著（ P＞0．05）。饲粮添加60 mg/kg烟酸极显著提高了16周龄鹅的屠宰率、半净膛率、腿肌率、胸肌率（P＜0．01），显著提高了16周龄鹅的全净膛率（P＜0．05）。3）与对照组相比，饲粮添加60 mg/kg烟酸极显著提高了干物质、有机物、粗蛋白质、粗脂肪、钙、磷、中性洗涤纤维、酸性洗涤纤维的表观利用率（ P＜0．01）。综合考虑，1～4周龄、5～8周龄及9～16周龄五龙鹅适宜烟酸需要量分别为85．54、63．48、63．48 mg/kg。
This experiment was conducted to study the effects of dietary nicotinic acid supplemental level on growth performance,slaughter performance and nutrient apparent availability of Wulong geese. Three hundred and sixty one-day-old Wulong geese were selected and randomly divided into 6 groups with 6 replicates in each group and 10 geese in each replicate. Geese in the control group（ group Ⅰ）were fed a basal diet（ nicotinic acid content：1 to 4 weeks of age was 25.54 mg/kg;5 to 16 weeks of age was 23.48 mg/kg）,and geese in the other experiment groups（ groupsⅡtoⅥ）were fed the basal diets supplemented with 20,40,60,80 and 100 mg/kg nicotinic acid,respectively. The experiment lasted for 16 weeks. The results showed as follows：1） compared with the control group,1 to 4 weeks of age,the supplementation of 60 mg/kg nicotinic acid signifi-cantly decreased the ratio of feed to gain（ F/G）（ P〈0.01）,but there was no significant difference in average daily gain among all groups（ P〉0.05）. Compared with the control group,5 to 8 weeks and 9 to 16 weeks of age,the supplementation of 40 mg/kg nicotinic acid significantly decreased F/G（ P〈0.05 and P〈0.01）. 2） Compared with the control group,the supplementation of 60 mg/kg nicotinic acid significantly increased dress-ing percentage,percentage of half-eviscerated weight,percentage of eviscerated weight of geese at 4 weeks of age（ P〈0.01）,but there were no significant differences in percentage of leg muscle and percentage of breast muscle among all groups（ P〉0.05）. The supplementation of 60 mg/kg nicotinic acid significantly increased dressing percentage,percentage of half-eviscerated weight,percentage of leg muscle of geese and percentage of breast muscle at 16 weeks of age（ P〈0.01）,and significantly increased percentage of eviscerated weight of geese at 16 weeks of age（ P〈0.05）. 3）Compared with the control group,the supplementation of 60 mg/kg nicotinic acid significantly increased the apparent availability of dry
出处
《动物营养学报》
CAS
CSCD
北大核心
2014年第8期2136-2144,共9页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家水禽技术产业体系(CARS-43-11)
青岛市科技计划项目(11-2-3-23-nsh)
关键词
烟酸
五龙鹅
生长性能
屠宰性能
养分表观利用率
nicotinic acid
Wulong goose
growth performance
slaughter performance
nutrient apparent a-vailability
