Productive performance, nutrient digestion and metabolism of Holstein (Bos taurus) and Nellore (Bos taurus indicus) cattle and Mediterranean Buffaloes (Bubalis bubalis) fed with corn-silage based diets
Productive performance, nutrient digestion and metabolism of Holstein (Bos taurus) and Nellore (Bos taurus indicus) cattle and Mediterranean Buffaloes (Bubalis bubalis) fed with corn-silage based diets
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DOI：
10.1016/j.livsci.2011.04.005
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发表时间：
2011-09-01
影响因子：
1.8
通讯作者：
Renno, F. P.
中科院分区：
文献类型：
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作者：
Gandra, J. R.;Freitas, J. E., Jr.;Renno, F. P.
本研究旨在评价三个不同遗传群体饲喂相同日粮玉米青贮料的生产性能和养分消化代谢性能。选用3组30头生长用小母牛，每组10头：Nellore(北牛)(n=10)、荷斯坦(n=10)和地中海水牛(Bubalis Bubalis)(n=10)。动物分组饲喂，饲喂由玉米青贮料和生长小母牛精料组成的相同试验日粮。在动物评定中，利用体内标记(氧化铬)和外部标记(IADF)测定了干物质和营养物质的生产性能、消耗量和总表观消化率、瘤胃发酵、嘌呤衍生物排泄量、氮平衡和血液代谢物，动物生产性能无差异。不同黄牛群体的营养物质采食量、干物质和营养物质表观消化率存在差异。与其他试验组相比，水牛瘤胃中氨氮(NH3-N)和短链脂肪酸(SCFA)浓度分别较高和较低。当考虑总嘌呤衍生物的排泄量时，水牛的排泄量最低，约占总遗传群Nellore的61.76%，占总遗传群荷斯坦牛的57.62%，平均为33.67 mmol/d。水牛体内黄嘌呤和次黄嘌呤的排泄量占总嘌呤衍生物的5.11%。与水牛小母牛组相比，荷斯坦小母牛和内洛尔小母牛有更好的氮平衡(g/天)。血清和肝酶中尿素和尿素氮的浓度存在差异，其中水牛的尿素和尿素氮浓度与牛的相关程度较高。在被评估的试验组之间有很大的代谢多样性，当接受相同的日粮和相同的管理条件时，水牛和牛之间的代谢多样性更严重。(C)2011爱思唯尔B.V.保留所有权利。
The objective of this study was to evaluate the productive performance, nutrients digestion and metabolism of three different genetic groups fed with the same diet based on corn silage. 30 heifers in growth were used of three groups of cattle, the following: Nellore (Bos taurus indicus) (n = 10), Holstein (Bos taurus taurus) (n = 10), and Mediterranean buffaloes (Bubalis bubalis) (n = 10). The animals were fed in groups and received the same experimental diet composed of corn silage and concentrate for growing heifers. In the evaluation of animals the performance, consumption and total apparent digestibility of dry matter and nutrients with the aid of internal markers (chromic oxide) and external (iADF), rumen fermentation, excretion of purine derivatives, nitrogen balance and blood metabolites were measured.No differences were observed in animal performance. There were differences in nutrient intake and apparent digestibility of dry matter and nutrients in different groups of cattle. The concentration of ammonia nitrogen (NH3-N) and short chain fatty acids (SCFA) in the rumen were higher and lower, respectively, for the group of buffaloes in relation to other experimental groups evaluated. When considering the excretion of total purine derivatives, buffaloes showed the lowest value compared to other genetic groups evaluated; about 61.76% of the total genetic group Nellore and 57.62% of the total genetic group Holstein with an average of 33.67 mmol/day. For the buffaloes, the excretion of xanthine and hypoxanthine observed was of 5.11% of total purine derivatives. There was a better nitrogen balance (g/day) for groups of Holstein heifers and Nellore in relation to the group of buffalo heifers. There were differences in the concentrations of urea and urea nitrogen in serum and liver enzymes where the buffaloes had higher values in relation at the bovines. There is a great metabolic diversity among the experimental groups evaluated and it was more exacerbated among buffaloes and bovines, when submitted to the same diet and same management conditions. (C) 2011 Elsevier B.V. All rights reserved.