摘要
试验旨在研究胍基乙酸(GAA)对育成期短毛黑母貂生长性能、脏器指数、营养物质和氨基酸表观消化率的影响。选用65日龄体重相近的育成期短毛黑母貂60只,随机分为6组,每组10个重复,每个重复1只貂,单笼饲养。对照组饲喂基础日粮,试验组饲喂在基础日粮中分别添加200、400、600、800、1000 mg/kg GAA的日粮。预试期1周,正试期分Ⅰ期(1~5周)和Ⅱ期(6~10周)。结果表明:与对照组相比,①育成期母貂基础饲粮中添加600 mg/kg GAA可显著提高Ⅰ、Ⅱ期和全期平均日增重(ADG)(P<0.05),极显著降低Ⅰ、Ⅱ期和全期料重比(F/G)(P<0.01),极显著提高全期平均日采食量(ADFI)(P<0.01),添加1000 mg/kg GAA可极显著提高Ⅱ期ADFI(P<0.01);②添加200 mg/kg GAA可显著提高心脏指数(P<0.05),1000 mg/kg组全肠长度极显著提高(P<0.01);③添加400 mg/kg GAA可极显著提高Ⅰ期粗蛋白(CP)表观消化率(P<0.01),添加600 mg/kg GAA可显著提高Ⅱ期粗脂肪(EE)表观消化率(P<0.05),极显著提高Ⅱ期粗灰分(Ash)、钙(Ca)和磷(P)表观消化率(P<0.01),添加1000 mg/kg GAA可显著提高Ⅱ期CP表观消化率(P<0.05);④添加600 mg/kg GAA可显著提高Ⅰ期总氨基酸(TAA)、Ⅱ期谷氨酸(Glu)表观消化率(P<0.05),极显著提高Ⅰ期赖氨酸(Lys)、Ⅱ期TAA表观消化率(P<0.01),添加800 mg/kg GAA可显著提高Ⅰ期胱氨酸(Cys)、蛋氨酸(Met)和精氨酸(Arg),Ⅱ期Met和组氨酸(His)表观消化率(P<0.05),极显著提高Ⅰ期缬氨酸(Val)和His、Ⅱ期Lys和Arg表观消化率(P<0.01)。综合生长性能、脏器指数、营养物质和氨基酸表观消化率等指标,建议育成期Ⅰ期、Ⅱ期母貂基础饲粮中GAA的最适添加量为600~800 mg/kg。
This experiment was conducted to determine the effects of guanidineacetic acid(GAA)on growth performance,organ indexes,nutrient and amino acid apparent digestibility of short-haired black famale minks.Sixty short-haired black famale minks with similar body weight were selected and randomly divided into 6 groups with 10 replicates in each group and 1 mink per replicate.Single cage feeding.The minks in control group were fed basal diet,the minks in experimental groups were fed the basal diet supplemented with 200,400,600,800 mg/kg and 1000 mg/kg GAA.The pre-experimental period lasted for 1 week and the experimental period was divided into experimental period Ⅰ(1 to 5 weeks)and experimental period Ⅱ(6 to 10 weeks).The results showed as follows:compared with the control group,①the basal diet supplemented with 600 mg/kg GAA significantly increased the average daily gain(ADG)during Ⅰ,Ⅱ and whole period(P<0.05),significantly decreased the ration of feed to gain(F/G)during Ⅰ,Ⅱ and whole period(P<0.01),and significantly increased the average daily feed intake(ADFI)during whole period(P<0.01),the basal diet supplemented with 1000 mg/kg GAA significantly increased the ADFI during period Ⅱ(P<0.01);②the basal diet supplemented with 200 mg/kg GAA significantly increased cardiac index(P<0.05),and 1000 mg/kg GAA group extremely significantly increased intestinal length(P<0.01);③the basal diet supplemented with 400 mg/kg GAA extremely significantly increased the digestibility of crude protein(CP)during period Ⅰ(P<0.01),the basal diet supplemented with 600 mg/kg GAA significantly increased the digestibility of crude fat(EE)during period Ⅱ(P<0.05)and extremely significantly increased the digestibility of Ash,calcium(Ca),phosphorus(P)during period Ⅱ(P<0.01),and 1000 mg/kg GAA significantly increased CP digestibility during period Ⅱ(P<0.05);④the basal diet supplemented with 600 mg/kg GAA significantly increased the digestibility of total amino acid(TAA)during periodⅠand glutamic(Glu)during period Ⅱ(P
作者
王小惠
李柯汝
张贝贝
胡立杰
李文立
WANG Xiaohui;LI Keru;ZHANG Beibei;HU Lijie;LI Wenli(College of Animal Science and Technology,Qingdao Agricultural University,Shandong Qingdao 266109,China;Qingdao NABT PhagePharm Co.,Ltd.,Shandong Qingdao 266109,China)
出处
《饲料工业》
CAS
北大核心
2024年第15期128-134,共7页
Feed Industry
基金
山东省特种经济动物产业技术体系项目[SDAIT-21-04]。
关键词
胍基乙酸
母貂
生长性能
营养物质表观消化率
氨基酸表观消化率
guanidineacetic acid
famale minks
growth performance
nutrients apparent digestibility
amino acid apparent digestibility
