西农萨能奶山羊乳中体细胞数与乳成分的变化规律及相关性研究  

Study on the Change Regularity and Correlation of Somatic Cell Count and Milk Composition in Xinong Saanen Dairy Goat Milk

作　　者：藏赛鸽 逄国梁 刘颖[1] 岳子婷 高文昌 李聪 罗军[1] ZANG Saige;PANG Guoliang;LIU Ying;YUE Ziting;GAO Wenchang;LI Cong;LUO Jun(College of Animal Science and Technology,Northwest A&F University,Shaanxi Yangling 712100,China;Animal Husbandry Technology Promotion Station of Shaanxi,Shaanxi Xi'an 710003 China)

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100 [2]陕西省畜牧技术推广总站,陕西西安710003

出　　处：《家畜生态学报》2022年第11期12-18,共7页Journal of Domestic Animal Ecology

基　　金：陕西省农业科技创新转化项目(NYKJ-2019-YL14);陕西省重点研发计划(2018ZDCXL-NY-01-05)。

摘　　要：试验旨在探究泌乳阶段和胎次对西农萨能奶山羊乳中体细胞数(Somatic cell count,SCC)、乳成分的影响及体细胞评分(Somatic cell score,SCS)与乳成分的相关性。选取120只西农萨能奶山羊,泌乳早期每周采集一次乳样,之后每四周采集一次乳样,并采用乳成分体细胞联机测定仪测定乳中体细胞数、乳成分相关指标。结果表明:(1)不同泌乳阶段西农萨能奶山羊乳中SCC无显著变化(P>0.05),乳脂率、乳蛋白率、乳糖率和总固形物率有极显著的变化(P<0.01),尿素氮有显著变化(P<0.05),且SCS、乳成分各个指标在不同泌乳阶段之间存在显著的相关性(P<0.01,P<0.05)。(2)不同胎次西农萨能奶山羊乳中SCC有显著变化(P<0.05),乳脂率、乳蛋白率、乳糖率和总固形物率有极显著的变化(P<0.01),尿素氮无显著变化(P>0.05),且SCS、乳成分各个指标在不同胎次之间存在显著的相关性(P<0.01,P<0.05)。(3)随着SCC的增加,SCS与日产奶量、乳糖率之间存在极显著的负相关性(P<0.01)。综上,通过西农萨能奶山羊乳中体细胞数与乳成分的变化规律及相关性研究,发现第2、3胎和泌乳早期西农萨能奶山羊的乳品质最佳,羊奶SCS与产奶性状间的相关关系有助于加快奶山羊群体改良,提高羊场科学管理水平。This experiment aims to explore the effects of lactation stage and parity on the somatic cell count(SCC)and milk composition of Xinong Saanen dairy goat milk,and the correlation analysis of somatic cell score(SCS)and milk composition.In this experiment,a total of 120 Xinong Saanen dairy goats were selected,and milk samples were collected once a week in the early lactation period,and then every four weeks,somatic cell count in milk and the related indexes of milk composition were determined by on-line milk composition analyzer.The results showed that:(1)There were no significant changes in SCC in the milk of Xinong Saanen dairy goats at different stages of lactation(P>0.05),and there were extremely significant changes in milk fat percentage,milk protein percentage,lactose percentage and total solid content(P<0.01),there was a significant change in urea nitrogen(P<0.05),and there was significant correlation between SCS and milk components in different stages of lactation(P<0.01,P<0.05).(2)SCC in Xinong Saanen goat milk with different parity had significant changes(P<0.05),milk fat percentage,milk protein percentage,lactose percentage and total solids percentage had extremely significant changes(P<0.01),urea nitrogen had no significant changes(P>0.05),and SCS and milk composition had significant correlation among different parity(P<0.01,P<0.05).(3)With the increase of SCC,there was a very significant negative correlation between SCS and daily milk yield and lactose percentage(P<0.01).In summary,In summary,through the study of the change regularity and correlation between the somatic cell count and milk components in Xinong Saanen dairy goat milk,it was found that the milk quality of Xinong Saanen dairy goats was the best at the second and third litters and early lactation,and goat milk SCS The correlation with milk production traits will help speed up the improvement of dairy goat populations and improve the scientific management of sheep farms.

关 键 词：西农萨能奶山羊 体细胞数 乳成分 变化规律 相关性 

分 类 号：S827.94[农业科学—畜牧学]