摘要
[目的]甲酸钙作为小分子质量的有机钙源,在改善蛋鸡生产方面具有很好的应用潜力。本研究旨在揭示饲粮添加甲酸钙对老龄蛋鸡生产性能、血液指标和鸡蛋品质的影响及适宜添加水平。[方法]试验采用单因子试验设计,选取360只62周龄健康海兰褐蛋鸡,随机分入4个处理组,每处理6个重复,每重复15只鸡。对照组饲喂基础饲粮,试验组分别饲喂以0.5%、1.0%和2.0%甲酸钙部分替代石粉的基础饲粮,各组饲粮的钙水平相同。正式期12周,每天记录产蛋情况,每周结料。在试验第2、4、6和8周测定鸡蛋品质相关指标;试验结束时,每重复取1只蛋鸡,采集血样,测定血常规和血清生化指标,然后屠宰测定脏器系数和胫骨质量。[结果]与对照组相比,饲粮添加甲酸钙对蛋鸡生产性能、第2和4周蛋品质无影响(P>0.05),但增加了第8和12周的蛋壳比、蛋壳厚度和蛋壳强度(P<0.05),其中0.5%添加水平效果最佳;降低了蛋鸡血液中中性粒细胞含量(P<0.05),增加了血红蛋白含量、红细胞压积及单核白细胞、嗜碱性粒细胞含量(P<0.05);降低了蛋鸡血清总蛋白、球蛋白、白蛋白和肌酐含量(P<0.05),增加了总胆红素含量(P<0.05);蛋鸡胰腺、脾脏、腿肌和胫骨指数均无显著差异(P>0.05),但胫骨断裂所需做功有增加的趋势(0.05<P<0.1)。[结论]饲粮添加甲酸钙部分替代石粉不影响老龄蛋鸡生产性能,且能改善蛋鸡的健康和蛋壳品质,推荐添加量为0.5%。
[Objective]As an organic calcium source with small molecular weight,calcium formate has a good application potential in improving the production of laying hens.The purpose of this study was to reveal the effect of dietary calcium formate supplementation on the production performance,blood indexes and egg quality of elderly laying hens,and the appropriate level of supplementation.[Method]A total of 36062-week-old healthy Hy-Line Brown laying hens were randomly divided into 4 treatment groups,with 6 replicates and 15 chickens per replicate.The hens in control group were fed a basal diet,and the hens in three experimental groups were fed 0.5%,1.0%and 2.0%calcium formate to partially replace the basal diet of stone powder,respectively,and the calcium level of each group was same.The formal feeding period was 12 weeks.The egg production was recorded every day,and the feed weekly.At weeks 2,4,6 and 8,egg quality was determined.At the end of the feeding,one layer per replicate was selected for blood samples collection,and blood routine and serum biochemical indexes were measured,and organ index and tibial mass were determined after slaughter.[Result]Compared with control group,calcium formate supplementation had no effects on the performance of laying hens and the egg quality at the second and fourth weeks(P>0.05),but increased the eggshell ratio,eggshell thickness and eggshell strength at the eighth and twelfth weeks(P<0.05),and the 0.5%addition level had the best effect.Calcium formate supplementation reduced the content of mononuclear leukocytes,basophils and neutrophils in the blood of laying hens(P<0.05),and increased the content of hemoglobin and hematocrit(P<0.05).Calcium formate supplementation decreased the serum total protein,globulin,albumin and creatinine contents(P<0.05),and increased the total bilirubin content(P<0.05).The pancreas,spleen,leg muscles and shinbone index of laying hens were not affected by calcium formate supplementation(P>0.05),but the work required for shinbone fracture increased(0.05<P<0.1).[Conclusion]Dietary addition of calcium formate to partially replace stone powder did not affect the production performance of elderly laying hens,while could improve the health of the body and the quality of eggshells,and the recommended addition level was 0.5%.
作者
邱凯
常心雨
高珊
张海华
张海军
武书庚
QIU Kai;CHANG Xinyu;GAO Shan;ZHANG Haihua;ZHANG Haijun;WU Shugeng(Key Laboratory of Feed Biotechnology,Ministry of Agriculture and Rural Affairs,National Engineering Research Center of Biological Feed,Institute of Feed Research,Chinese Academy of Agricultural Sciences,Beijing 100081,China;Hebei Key Laboratory of Specialty Animal Germplasm Resources Exploration and Innovation,Hebei Normal University of Science&Technology,Qinhuangdao 066004,China)
出处
《中国畜牧兽医》
CAS
CSCD
北大核心
2024年第8期3320-3328,共9页
China Animal Husbandry & Veterinary Medicine
基金
北京市家禽创新团队
国家自然科学基金项目(32072774)
河北省现代农业产业技术体系蛋鸡肉鸡营养与饲料岗(HBCT2023210202)
中国农业科学院农业科技创新工程(ASTIP)。
关键词
甲酸钙
老龄蛋鸡
生产性能
蛋品质
calcium formate
elderly laying hens
production performance
egg quality
