家畜生态学报2023，Vol.44Issue(12)：35-41,7.DOI:10.3969/j.issn.1673-1182.2023.12.007
东湖杂交绵羊奶不同月份常规营养成分及相关性分析
Analysis of Conventional Nutrient Composition and Correlation of Hybrid Sheep Milk in Different Months
摘要
Abstract
The objective of this study was to explore the variations in conventional nutrients in milk samples obtained from East Friesen sheep and Hu sheep hybrid across different lactating months,and to analyze the correlation between these nutrients.The healthy Dong-hu hybrid dairy sheep were used as the research object,and their milk was collected regularly every month.The experimental conditions remained consistent across the varying months.An automatic milk sample analyzer was utilized to measure non-fat solids,total solids,milk fat,milk protein,lactose,pH,ash,conductivity,density,and freezing point,with subsequent generation of variation curves based on the collected data.Data analysis involved the use of Duncan multiple comparison and Pearson correlation analysis in SPSS 26.0 software.The findings revealed significant variations(P＜0.01)in non-fat solids,total solids,milk fat,milk protein,lactose,pH,ash,conductivity,density and freezing point across different months.Notably,significant correlations were ob-served among the various indicators other than conductivity.Milk fat exhibited positive correlations with non-fat solids,protein,ash,total solids,density and lactose(P＜0.05),and a negative correlation with freezing point(P＜0.05).Non-fat solids were significantly positively correlated with lactose,protein,total solids,ash,density(P＜0.01),while freezing point was significantly negatively correlated with these in-dexes(P＜0.01)except for ash.Across lactating months,total solids,non-fat solids,milk fat,milk pro-tein,ash and ash displayed a decreasing-then-increasing trend,while lactose and density exhibited stabili-ty.The overall pH demonstrated a slight increase,followed by a decrease and subsequent increase.The conductivity displayed a decreasing-then-increasing-then-decreasing trend,reaching its peak in October.The freezing point showed a decreasing-then-increasing trend.In summary,lactating months exerted a sig-nificant impact on the conventional nutrients of sheep milk,with noticeable variations and interrelation-ships between the nutrients.The study offers valuable technical support for the practical production of dairy sheep and the advancement of sheep dairy products.关键词
绵羊乳/月份/常规营养成分/相关性Key words
sheep milk/month/conventional nutrients/correlation分类
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王丽,宋红卫,张瑞,肖宇航,张希云,徐文芳,张金生,张磊,宋宇轩..东湖杂交绵羊奶不同月份常规营养成分及相关性分析[J].家畜生态学报,2023,44(12):35-41,7.基金项目
国家重点研发计划资助(2022YFD1600101) （2022YFD1600101）
基于全基因组选择育种技术(GS)选育奶绵羊核心群(2023-YBNY-130) （GS）
陕西省畜禽育种"两链"融合重点专项(2022GD-TSLD-46-0202) （2022GD-TSLD-46-0202）
