瘤胃能氮同步释放对奶牛微生物蛋白合成和瘤胃发酵的影响

doi:10.16431/j.cnki.1671-7236.2015.02.022

›› 2015, Vol. 42 ›› Issue (2): 375-381.doi: 10.16431/j.cnki.1671-7236.2015.02.022

瘤胃能氮同步释放对奶牛微生物蛋白合成和瘤胃发酵的影响

张俊瑜¹, 臧长江², 王文奇¹, 郭同军¹, 王世昌¹, 桑断疾¹

1. 新疆畜牧科学院饲料研究所, 乌鲁木齐 830000;
2. 新疆农业大学动物科学学院, 乌鲁木齐 830052

收稿日期:2014-08-15 出版日期:2015-02-20 发布日期:2015-02-13
通讯作者: 桑断疾 E-mail:sangdj@126.com
作者简介:张俊瑜(1983-),男,新疆察布查尔人,硕士,助理研究员,研究方向:反刍动物营养与饲料科学,E-mail:363180001@qq.com;Tel:0991-4833564
基金资助:
新疆维吾尔自治区公益性科研院所基本科研业务经费(KY2013017);公益性行业(农业)科研专项经费(201303062)

Effect of Synchronizing the Rate of Dietary Energy and Nitrogen Release in Diets on Microbial Protein Synthesis and Rumen Fermentation in Dairy Cows

ZHANG Jun-yu¹, ZANG Chang-jiang², WANG Wen-qi¹, GUO Tong-jun¹, WANG Shi-chang¹, SANG Duan-ji¹

1. Institute of Feed Research, Xinjiang Academy of Animal Science, Urumqi 830000, China;
2. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China

Received:2014-08-15 Online:2015-02-20 Published:2015-02-13

摘要/Abstract

摘要： 本研究通过体外产气试验,研究瘤胃能氮同步释放对微生物蛋白合成和瘤胃发酵的影响。试验选用4头健康、泌乳中期的荷斯坦奶牛作为瘤胃液供体动物,采用单因子试验设计,设置3种不同能氮同步化指数的等能、等氮日粮(日粮A,SI=0.74;日粮B,SI=0.83;日粮C,SI=0.91)。结果表明,随着日粮SI值增加,微生物蛋白合成量显著增加(P<0.05)、氨氮浓度在8和12 h极显著下降(P<0.01);A组与B组相比,在8 h时,产气量、pH达到了显著或极显著差异(P<0.05;P<0.01),12 h时,挥发性脂肪酸含量达到了极显著差异(P<0.01)。结果显示,日粮能氮同步释放可显著影响瘤胃微生物蛋白的合成量和氨氮浓度。

关键词: 能氮同步化指数; 微生物蛋白; 瘤胃发酵; 奶牛

Abstract: The objective of this experiment was to study the effect of synchronizing the rate of dietary energy and nitrogen release in diets on microbial protein synthesis and rumen fermentation in dairy cows using in vitro gas production method.Four healthy Holstein cows in mid-lactation were used to offer rumen juice.A single factor experimental design and three isoenergetic and isonitrogenous diets varying in synchronization index (SI) were used in this study (diet A,SI=0.74;diet B,SI=0.83;diet C,SI=0.91).The results showed that microbial protein production was significantly increased (P<0.05),and NH₃-N concentrtatin was extremely significantly decreased in 8 and 12 h as synchrony level of diets increased (P<0.01).In 8 h,group A compared with group B,gas production,pH eached significant or extremely significant difference (P<0.05;P<0.01),in 12 h,group A compared with group B,the volatile fatty acid content was extremely significant difference (P<0.01).The results indicated that synchronization of dietary energy and nitrogen release had significant influence on microbial protein synthesis and NH₃-N concentration for dairy cows.

Key words: synchrony index; microbial protein; rumen fermentation; dairy cows

中图分类号:

S823.9⁺1

张俊瑜, 臧长江, 王文奇, 郭同军, 王世昌, 桑断疾. 瘤胃能氮同步释放对奶牛微生物蛋白合成和瘤胃发酵的影响[J]. , 2015, 42(2): 375-381.

ZHANG Jun-yu, ZANG Chang-jiang, WANG Wen-qi, GUO Tong-jun, WANG Shi-chang, SANG Duan-ji. Effect of Synchronizing the Rate of Dietary Energy and Nitrogen Release in Diets on Microbial Protein Synthesis and Rumen Fermentation in Dairy Cows[J]. , 2015, 42(2): 375-381.

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瘤胃能氮同步释放对奶牛微生物蛋白合成和瘤胃发酵的影响

Effect of Synchronizing the Rate of Dietary Energy and Nitrogen Release in Diets on Microbial Protein Synthesis and Rumen Fermentation in Dairy Cows

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