动物营养学报2018，Vol.30Issue(4)：1566-1573,8.DOI:10.3969/j.issn.1006-267x.2018.04.042
苜蓿鲜草部分替代苜蓿青干草对奶牛生产性能和血清生化指标的影响
Effects of Partial Replacement of Alfalfa Hay with Fresh Alfalfa on Performance and Serum Biochemical Parameters of Dairy Cows
摘要
Abstract
The present study was conducted to determine the effects of replacing alfalfa hay with different pro?portions of fresh alfalfa on performance and serum biochemical parameters of dairy cows. Eighteen healthy Hol?stein cows at mid?lactation with similar parity,body weight and milk yield were randomly divided into 3 groups with 6 cows per group. Different proportions[0(control group),50%(trial groupⅠ)and 75%(trial groupⅡ)]of alfalfa hay in a basal diet were replaced with fresh alfalfa, and those diets were used to feed cows in different groups. The pretrial lasted for 15 d, and the trial lasted for 30 d. The results showed as follows: 1) dry matter intake and milk yield were not significantly affected by replacing alfalfa hay with different propor?tions of fresh alfalfa(P>0.05),but milk somatic cell count of trial groups was significantly lower than that of control group(P<0.05). 2)Apparent nutrient digestibility was not significantly affected by replacing alfalfa hay with different proportions of fresh alfalfa(P>0.05).3)Serum total protein,albumin,globulin,cholester?ol, glucose, triglyceride, high?density lipoprotein and low density lipoprotein contents, and alanine transami?nase, aspartate aminotransferase and alkaline phosphatase activities were not significantly affected by replacing alfalfa hay with different proportions of fresh alfalfa(P>0.05). Serum urinary nitrogen content of trial groupⅠ was significantly higher than that of control group and trial group Ⅱ(P<0.05), but no significant differ?ence was found in control group and trial group Ⅱ(P>0.05). 4)Compared with the control group, the eco?nomic benefit of trial groups Ⅰ and Ⅱ was increased, especially trial group Ⅱ and it had the highest added profit which was 9.05 yuan/(head·d). Therefore, alfalfa hay can be partially replaced with fresh alfalfa in dairy cow diet without effects on performance, digestion metabolism, serum biochemical parameters and im?prove the economic benefits.关键词
奶牛/苜蓿鲜草/苜蓿青干草/生产性能/血清生化指标Key words
Holstein cow/fresh alfalfa/alfalfa hay/performance/serum biochemical parameters分类
农业科技引用本文复制引用
李志才,高帅,段洪峰,龙栋磊,韩雪峰,谭支良..苜蓿鲜草部分替代苜蓿青干草对奶牛生产性能和血清生化指标的影响[J].动物营养学报,2018,30(4):1566-1573,8.基金项目
湖南省科技重大专项(2017NK1020) （2017NK1020）
