放牧肉牛生产性能和代谢状况的产前和产后补充策略

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pesquisa Agropecuaria Brasileira Pub Date : 2023-06-26 DOI:10.1590/s1678-3921.pab2023.v58.03102
D. Moreno, R. M. Ortega, M. F. Paulino, L. N. Rennó, E. Detmann
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引用次数: 0

摘要

摘要本研究旨在评价热带牧场放牧肉牛产前和产后补充能量蛋白对其生产和代谢反应的影响。选取48头初孕期为6.4个月、体重为514.9 kg、体况评分为5.4的Nellore奶牛,采用2×2因子设计,采用完全随机设计。评估的治疗方法为:UNS-UNS,孕产期不补充;UNS-SUP,孕前不补充,产后补充;SUP-UNS,产前补充,产后不补充;和SUP-SUP,在产前和产后补充。能量蛋白补充量为每只动物每天1.5 kg。产犊时添加制剂可提高平均日增重和BCS。产前补充减少了非酯化脂肪酸(NEFA),并增加了产后总蛋白和球蛋白的血清浓度。产后添加可提高奶牛的BCS和试验结束时犊牛的体重。产后补充增加孕酮血药浓度,而NEFA降低。在妊娠最后84天,每天添加1.5 kg能量蛋白补充剂可改善放牧奶牛产前和产后的生产性能和代谢状况。
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Pre-and postpartum supplementation strategies on the performance and metabolic status of grazing beef cows
Abstract The objective of this work was to evaluate the effect of energy-protein supplementation in preand postpartum periods on the productive and metabolic responses of grazing beef cows on tropical pasture. A group of 48 multiparous Nellore cows, with an initial gestation period of 6.4 months, body weight (BW) of 514.9 kg, and body condition score (BCS) of 5.4, was distributed in a completely randomized design, in a 2×2 factorial arrangement. The evaluated treatments were: UNS-UNS, unsupplemented during prepartum and postpartum; UNS-SUP, unsupplemented during prepartum and supplemented during postpartum; SUP-UNS, supplemented during prepartum and unsupplemented during postpartum; and SUP-SUP, supplemented during preand postpartum. The energy-protein supplement was offered at an amount of 1.5 kg per animal per day. Prepartum supplementation increased average daily gain and BCS at calving. Prepartum supplementation reduced non-esterified fatty acids (NEFA) and increased serum concentrations of total proteins and globulins during postpartum. Postpartum supplementation increased the BCS of cows and BW of calves at the end of the experiment. Postpartum supplementation increased blood concentrations of progesterone, while NEFA decreased. Supplementation with 1.5 kg per day of the energy-protein supplement during the last 84 days of gestation improves productive performance and metabolic status during the preand postpartum periods of grazing cows.
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来源期刊
Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuaria Brasileira 农林科学-农业综合
CiteScore
1.20
自引率
0.00%
发文量
45
审稿时长
9-18 weeks
期刊介绍: Pesquisa Agropecuária Brasileira – PAB – is issued monthly by Empresa Brasileira de Pesquisa Agropecuária – EMBRAPA, affiliated to Ministry of Agriculture, Livestock and Food Supply. PAB publishes original scientific-technological articles on Plant Physiology, Plant Pathology, Crop Science, Genetics, Soil Science, Food Technology and Animal Science. Its abbreviated title is Pesq. agropec. bras., and it should be used in bibliographies, footnotes, references and bibliographic strips.
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