摘要
本试验旨在研究饲粮铜添加水平对育成期水貂生长性能、营养物质消化率及氮代谢的影响。选择(60±3)日龄健康雄性水貂80只,随机分成8组,每组10个重复,每个重复1只貂。8组水貂分别饲喂铜添加水平为0(Ⅰ组)、4(Ⅱ组)、8(Ⅲ组)、16(Ⅳ组)、32(Ⅴ组)、64(Ⅵ组)、128(Ⅶ组)、256 mg/kg(Ⅷ组)的试验饲粮。预试期7 d,正试期60 d。结果表明:Ⅴ组的末重和平均日增重极显著高于Ⅷ组(P<0.01),而料重比则极显著低于Ⅷ组(P<0.01)。Ⅴ组的平均日采食量极显著高于Ⅰ和Ⅶ组(P<0.01),显著高于Ⅲ组(P<0.05)。Ⅴ组的干物质采食量极显著高于Ⅷ组(P<0.01)。Ⅴ组的干物质消化率极显著高于Ⅵ组(P<0.01),显著高于Ⅱ和Ⅷ组(P<0.05)。Ⅴ组的蛋白质消化率极显著高于Ⅷ组(P<0.01),显著高于Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅵ和Ⅶ组(P<0.05)。Ⅳ和Ⅴ组的脂肪消化率显著高于Ⅷ组(P<0.05)。Ⅴ组的食入氮极显著高于Ⅷ组(P<0.01)。Ⅴ组的氮沉积极显著高于Ⅱ、Ⅲ、Ⅵ和Ⅷ组(P<0.01),显著高于Ⅰ和Ⅳ组(P<0.05)。Ⅴ组的净蛋白质利用率显著高于Ⅱ、Ⅲ、Ⅵ和Ⅷ组(P<0.05)...
This experiment was conducted to study the effects of dietary copper supplemental level on growth performance,nutrient digestibility and nitrogen metabolism of growing minks.Eighty healthy male minks at the age of(60±3) days were randomly divided into 8 groups with 10 replicates each and 1 mink per replicate.The minks in the 8 groups were fed experimental diets with copper supplemental levels of 0(group Ⅰ),4(group Ⅱ),8(group Ⅲ),16(group Ⅳ),32(group Ⅴ),64(group Ⅵ),128(group Ⅶ) and 256 mg/kg(group Ⅷ),respectively.The pre-test period lasted for 7 days and the trial period lasted for 60 days.The results showed as follows: the final weight and average daily gain in the group Ⅴ were extremely significantly higher than those in the group Ⅷ(P<0.01),while the feed/gain in the group Ⅴ was extremely significantly lower than that in the group Ⅷ(P<0.01).The average daily feed intake in the group Ⅴ was extremely significantly higher than that in the groups Ⅰ and Ⅶ(P<0.01),and was significantly higher than that in the group Ⅶ(P<0.05).The dry matter(DM) intake in the group Ⅴ was extremely significantly higher than that in the group Ⅷ(P<0.01).The DM digestibility in the group Ⅴ was extremely significantly higher than that in the group Ⅵ(P<0.01),and was significantly higher than that in the groups Ⅱ and Ⅷ(P<0.05).The protein digestibility in the group Ⅴ was extremely significantly higher than that in the group Ⅷ(P<0.01),and was significantly higher than that in the groups Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅵ and Ⅶ(P<0.05).The fat digestibility in the groups Ⅳ and Ⅴ was significantly higher than that in the group Ⅷ(P<0.05).The nitrogen intake in the group Ⅴ was extremely significantly higher than that in the group Ⅷ(P<0.01).The nitrogen deposition in the group Ⅴ was extremely significantly higher than that in the groups Ⅱ,Ⅲ,Ⅵ and Ⅷ(P<0.01),and was significantly higher than that in the groups Ⅰ and Ⅳ(P<0.05).The net protein utilization in the group Ⅴ was significantly highe
出处
《动物营养学报》
CAS
CSCD
北大核心
2012年第6期1078-1084,共7页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
公益性行业(农业)科研专项(200903014)
关键词
育成期
水貂
生长性能
营养物质消化率
氮代谢
copper
growing period
mink
growth performance
nutrient digestibility
nitrogen metabolism
