半胱胺和过瘤胃蛋氨酸不同组合对奶牛血液生化指标和养分消化率的影响  

Effects of combination of cysteamine and rumen-protected methionine on blood biochemical parameter and nutrient digestibility of dairy cows

作　　者：张仔堃 张玉利 李美玉[1] 董瑞兰[1] 孙国强[1] ZHANG Zikun;ZHANG Yuli;LI Meiyu;DONG Ruilan;SUN Guoqiang(College of Animal Science and Technology,Qingdao Agricultural University,Qingdao,Shandong Province 266109,China;Jinan Animal Husbandry Technology Extension Station,Jinan,Shandong Province 250306,China)

机构地区：[1]青岛农业大学动物科技学院,山东青岛266109 [2]济南市畜牧技术推广站,山东济南250306

出　　处：《中国饲料》2020年第11期61-64,共4页China Feed

基　　金：山东省现代农业产业技术体系牛产业创新团队(SDAIT-09-08);山东省绿色低碳畜牧业技术协同创新中心。

摘　　要：为研究半胱胺(CS)和过瘤胃蛋氨酸(RPMet)不同水平组合对奶牛血液生化指标和养分消化率的影响,试验选取体重、胎次、产奶量及泌乳期相近的荷斯坦奶牛40头,随机分为10组,每组4头。对照组(C组)饲喂基础饲粮,试验组补饲不同水平组合的CS和RPMet。CS分别添加13(L)、15(M)、17(H)g/(d·头);RPMet分别添加23(L)、25(M)、27(H)g/(d·头)。预试期15 d,正试期60 d。结果表明:HL组血清白蛋白含量比C组提高9.55%(P <0.01),ML、MH、HM、HH组比C组提高5.82%、5.92%、7.37%、6.96%(P <0.05)。LH、ML、MM、MH、HL、HM、HH组血清尿素氮浓度比C组降低7.27%、8.01%、8.90%、8.46%、9.50%、8.75%、8.16%(P <0.05)。各试验组干物质消化率比C组提高1.19%、4.36%、2.08%、2.68%、4.04%、1.59%、6.00%、1.50%、5.60%(P <0.01)。MM、HL、HH组酸性洗涤纤维消化率比C组提高19.74%、20.39%、14.47%(P <0.01)。综合考虑上述指标,在本试验设计条件下,以HL组,即CS 17 g/(d·头)、RPMet 23 g/(d·头)为最佳添加组合。This experiment was conducte to determine the effects of different combinations of cysteamine(CS) and rumen-protected metnionine(RPMet) on blood biochemical parameter and nutrient digestibility of dairy cows. 40 holstein cows with similar body weight,birth order,milk yield and lactation days were selected and randomly divided into 10 groups. The control group(C group) was fed basic diet,while the test group was supplemented with CS and RPMet at different levels. The addition level of CS was 13(L),15(M),17(H) g/(d·head). The addition levels of RPMet were 23(L),25(M) and 27(H) g/(d·head). The pre-experiment period was 15 days and the formal experiment period was 60 days.The results showed that the serum albumin content of HL group was significantly higher than that of C group(P < 0.01),and the ML,MH,HM,HH group was significantly higher than that of C group(P < 0.05). The serum urea nitrogen concentration of LH,ML,MM,MH,HL,HM,HH group was significantly lower than that of C group(P < 0.05). The dry matter digestibility of each experimental group was significantly higher than that of C group(P < 0.01). The digestibility of neutral washing fiber in MM,HL,HH group was significantly higher than that in C group(P <0.01). After comprehensive consideration of various indicators,HL group,CS 17 g/(d·head),RPMet 23 g/(d·head) was the best combination.

关 键 词：半胱胺 过瘤胃蛋氨酸 血液生化指标 养分消化率 

分 类 号：S816.7[农业科学—饲料科学]