动物营养学报 >

2015 , Vol. 27 >Issue 4: 1262 - 1269

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.04.033

研究简报 Short Communications

半胱胺对奶牛瘤胃微生物蛋白产量、产奶性能和氮排泄的影响

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  • 1. 青岛农业大学动物科技学院, 青岛 266109;
    2. 青岛市畜牧兽医研究所, 青岛 266100
王玲(1990-),女,山东淄博人,硕士研究生,研究方向为反刍动物营养。E-mail:xiaguang_66@163.com

收稿日期: 2014-08-26

  网络出版日期: 2015-04-21

基金资助

山东省现代农业产业技术体系牛产业创新团队(SDAIT-12-011-08)

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Effects of Cysteamine on Ruminal Microbial Protein Production, Milk Performance and Nitrogen Excretion

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  • 1. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China;
    2. Institute of Animal Husbandry and Veterinary Medicine of Qingdao, Qingdao 266100, China

Received date: 2014-08-26

  Online published: 2015-04-21

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摘要

本试验旨在研究半胱胺(cysteamine,CS)对奶牛瘤胃微生物蛋白产量、产奶性能和氮排泄的影响。选取年龄、体重、产奶量及泌乳期[(135±15) d]相近的荷斯坦奶牛40头,分为4组,对照组和试验1组、2组、3组分别补饲0、15、20和25 g/(d·头)CS。预试期14 d,正试期56 d。结果表明:1)试验组的瘤胃微生物蛋白产量显著或极显著高于对照组(P<0.05或P<0.01),试验1组、2组和3组分别比对照组提高27.27%、66.56%、55.42%。2)试验组产奶量显著高于对照组(P<0.05),分别比对照组提高18.97%、19.58%、11.25%。3)CS能显著或极显著提高乳脂率和乳蛋白率(P<0.05或P<0.01),显著降低乳体细胞数(P<0.05),以试验2组最低。4)在氮总排泄量上,试验组极显著低于对照组(P<0.01),试验1组、2组和3组分别降低16.24%、22.66%、9.92%。由此可见,本试验条件下,综合考虑瘤胃微生物蛋白产量、产奶量、乳成分含量及氮排泄指标,CS添加量以20 g/(d·头)最有利。

关键词： 半胱胺; 瘤胃微生物蛋白; 产奶性能; 氮排泄

本文引用格式

王玲, 孙友德, 刘锡武, 孙国强 . 半胱胺对奶牛瘤胃微生物蛋白产量、产奶性能和氮排泄的影响[J]. 动物营养学报, 2015 , 27(4) : 1262 -1269 . DOI: 10.3969/j.issn.1006-267x.2015.04.033

Abstract

This experiment was conducted to determine the effects of cysteamine (CS) on microbial protein production, milk performance and nitrogen excretion. Forty Holstein lactating cows with similar age, body weight, milk yield and lactation stage [(135±15) d] were divided into 4 groups. The supplemental level of CS in control group, test groups 1, 2 and 3 was 0, 15, 20 and 25 g/(d·head), respectively. The pretest lasted for 14 days, and the test lasted for 56 days. The results showed as follows: 1) ruminal microbial protein production in test groups was significantly increased by 27.27%, 66.56% and 55.42% compared with that in control group (P<0.05 or P<0.01). 2) The cows in test groups 1, 2 and 3 had 18.97%, 19.58% and 11.25% greater daily yields of milk than those cows in the control group (P<0.05). 3) CS could significantly increase milk fat percentage and milk protein percentage (P<0.05 or P<0.01), but significantly reduced milk somatic cell count (P<0.05), especially the test group 2. 4) Compared with control group, total nitrogen excretion in test groups was significantly reduced (P<0.01), and was reduced by 16.24%, 22.66% and 9.92% in test groups 1, 2 and 3, respectively. Based on the data of ruminal microbial protein production, milk yield, milk composition content and nitrogen excretion indices, it can be concluded that the suitable supplemental level of CS is 20 g/(d·head)in dairy cows under the condition in the present study.

Key words： cysteamine; microbial protein production; milk performance; nitrogen excretion

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