| 不同蛋白质水平饲粮对3~4月龄中国荷斯坦犊牛生长性能及消化率的影响 |
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| 引用本文： | 刘清锋,郑开之,姜俊芳,郑会超,吴建良,黄新,蒋永清.不同蛋白质水平饲粮对3~4月龄中国荷斯坦犊牛生长性能及消化率的影响[J].畜牧与兽医,2021(4):32-37. |
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| 作者姓名： | 刘清锋 郑开之 姜俊芳 郑会超 吴建良 黄新 蒋永清 |
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| 作者单位： | 浙江师范大学化学与生命科学学院;浙江省农业科学院畜牧兽医研究所 |
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| 基金项目： | 国家现代农业产业技术体系奶牛产业技术体系(CARS-36)。 |
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| 摘 要： | 试验旨在研究3~4月龄中国荷斯坦犊牛的适宜饲粮蛋白水平。选取24头65日龄犊牛随机分为3组,分别饲喂19%、21%和23%3种蛋白水平饲粮,分析饲粮蛋白水平对犊牛生长性能、血液生化指标和消化率的影响。结果表明:饲喂19%、21%和23%3种蛋白水平饲粮后,试验全组的日增重分别为(1.19±0.16)kg/d、(1.23±0.16)kg/d、(1.24±0.13)kg/d,组间差异不显著;饲粮蛋白水平对犊牛体斜长显著影响(P<0.05)。血清尿素氮,甘油三酯和游离脂肪酸含量随着饲粮水平的增加而显著提高(P<0.01);饲粮蛋白质水平对总蛋白,白蛋白,乳酸脱氢酶,碱性磷酸酶,谷草转氨酶,总胆固醇,高密度脂蛋白胆固醇,低密度脂蛋白胆固醇,葡萄糖等的影响不显著。粗蛋白、干物质粗脂肪和中性洗涤纤维消化率随饲粮蛋白质水平提高而减低。综合试验犊牛日增重、体尺指标、血液指标和营养物质消化率等各方面的因素,在本试验条件下19%蛋白水平的饲粮对于3~4月龄犊牛最为合适。
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| 关 键 词： | 饲粮蛋白水平 犊牛 生长性能 消化率 血液生化指标 |
Effect of dietary protein levels on the growth performance,nutrient digestibility and serum biochemical indices of 3-4 month old Chinese Holstein calves |
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| LIU Qingfeng,ZHENG Kaizhi,JIANG Junfang,ZHENG Huichao,WU Jianliang,HUANG Xin,JIANG Yongqing.Effect of dietary protein levels on the growth performance,nutrient digestibility and serum biochemical indices of 3-4 month old Chinese Holstein calves[J].Animal Husbandry & Veterinary Medicine,2021(4):32-37. |
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| Authors: | LIU Qingfeng ZHENG Kaizhi JIANG Junfang ZHENG Huichao WU Jianliang HUANG Xin JIANG Yongqing |
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| Institution: | (College of Chemistry and Life Sciences,Zhejiang Normal University,Jinhua 321004,China;Institute of Animal Husbandry and Veterinary Medicine,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China) |
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| Abstract: | The aim of this study was to investigate appropriate dietary protein levels for 3-4 month old Chinese Holstein calves.24 calves of 65 days of age were obtained and randomly assigned into three dietary treatment groups fed with diets containing 19%,21% or 23% crude protein,respectively.Then analyses were performed to determine the effects of the dietary protein levels on the growth performance,nutrient digestibility and serum biochemical indices of the calves.The results showed that the average daily weight gains of the 19%,21% and 23% protein level groups were(1.19±0.16)kg/d,(1.23±0.16)kg/d and(1.24±0.13)kg/d respectively,with no significance between them.However,the calves’body length was significantly influenced by the dietary protein levels(P<0.05).Their apparent digestibility of neutral detergent fiber,crude protein,and crude fat were decreased with the increase of the dietary protein levels.The contents of urea nitrogen in serum,triglyceride and free fatty acid og the animals were significantly increased with the higher dietary levels(P<0.01).But their total protein,albumin,lactate dehydrogenase,alkaline phosphatase,glutamic oxalate transaminase,total cholesterol,high density lipoprotein cholesterol,low density lipoprotein cholesterol and glucose in serum were not significantly affected by the dietary protein levels.Comparatively,the diet containing 19% protein was the most appropriate for calves at the age of 3 to 4 months. |
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| Keywords: | dietary protein level calves growth performance nutrient digestibility serum biochemical indices |
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