Metabólitos sanguíneos de vacas de corte suplementadas ou não com sais de cálcio de ácidos graxos durante o período pré e/ou pós-parto

Silveira, Magali Floriano da; Restle, João; Menezes, Luis Fernando Glaszenapp de; Brondani, Ivan Luiz; Nörnberg, José Laerte; Callegaro, Aline Marian

doi:10.1590/s0102-09352012000600003

Cited by 9 publications

(8 citation statements)

References 18 publications

(9 reference statements)

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“…A further important function of blood glucose is the control of reproduction (Silveira et al, 2012). According to Wetteman, Lents, Ciccioli, White and Rubio (2003), glucose is the first metabolic nutrient used by the central nervous system, and in this respect, an inadequate availability of glucose has been shown to reduce the hypothalamic release of gonadotropin-releasing hormone (GnRH), an essential hormone involved in regulation of the estrous cycle in females.…”

Section: Resultsmentioning

confidence: 99%

“…In addition to an evaluation of BCS, the assessment of blood metabolites has been used to identify metabolic disorders during the postpartum period of beef cows, and can provide an indication of nutritional status (Silveira et al, 2012). Monitoring these metabolites can contribute to the prevention of metabolic disorders and thus promote better health conditions for the herd and reduce the likelihood of reductions in the rates productivity and reproduction (Bolzan et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Metabolic status of crossbred Charolais × Nellore cows throughout the final third of gestation and lactation

Klein

Adams

Filho

et al. 2021

Semina: Ciênc. Agrár.

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The objective of this study was to evaluate the metabolic status of beef cows during the final third of gestation and thereafter until the end of the subsequent breeding season. The study was conducted using 30 beef cows, aged between 4 and 11 years, derived from crosses between Charolais and Nellore cattle. To assess the metabolic status of cows, we obtained measurements of body weight and condition (BW and BCS), and complemented these by analyzing the following blood metabolites: total proteins, globulins, albumin, glucose, cholesterol, and triglycerides. Assessments were performed at 95 days pre-calving, and again at 7, 21, 63, and 110 days post-calving. The experimental design was completely randomized with five collection periods and 30 repetitions (cows). The BW of cows was found to be highest at 110 days postpartum (489.1 kg), and loss of BW was observed between 21 and 63 days postpartum (-3.72 kg). The lowest BCS value was recorded after 63 days of lactation (2.85 points). With respect to blood metabolites, concentrations of total proteins were higher at 7 and 110 days postpartum relative to the levels recorded during gestation (8.3 and 8.3 vs. 7.7 g dL-1, respectively), whereas serum globulin levels were higher at 7, 21, and 110 days postpartum relative to those at gestation (5.2, 5.2, and 5.1 vs. 4.8 g dL -1, respectively). Compared with samples obtained during gestation, the highest levels of albumin (P < 0.05) were observed at 7, 63, and 110 days postpartum (3.1, 3.1, and 3.2 vs. 2.9 g dL-1, respectively). Serum glucose was higher during pregnancy and in the first week of lactation relative to the values recorded after 21 and 63 days of lactation (80.9 and 76.7 vs 71.5 and 72.3 mg dL-1, respectively). Moreover, cholesterol concentrations increased with the progression of lactation, with the highest value being recorded at 110 days postpartum (222.1 mg dL-1). Collectively, the findings of this study, indicate that Charolais × Nellore cows raised exclusively on native pasture mobilize body reserves, lose weight, and show a negative energy balance during the first weeks of lactation, with detrimental consequences for subsequent reproductive activity.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metabolic status of crossbred Charolais × Nellore cows throughout the final third of gestation and lactation

Klein

Adams

Filho

et al. 2021

Semina: Ciênc. Agrár.

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“…Thus, the supply of low intake energy supplements supported body condition maintenance from calving until weaning without a significant effect of the energy sources for this characteristic. According to Silveira et al (2012) supplementation with protected fat during the period of milk production of beef cows helps in maintaining a positive energy balance, which may result in lower mobilization of body reserves, reducing the drop in body condition. In contrast, in cows fed with mineral mixture, the body condition showed quadratic variation as a function of days post-calving, with lowest body condition score estimated for 138 days after parturition.…”

Section: Resultsmentioning

confidence: 99%

Energy sources in low intake supplements on the productive and reproductive performance of Zebu cows

et al. 2015

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The aim of this study was to evaluate the productive and reproductive performance of primiparous zebu cows supplemented on Brachiaria brizantha cv. Marandu with supplements of low intake composed of different energy sources in the postpartum period. Sixty cow-calf pairs were divided into three treatments, a standard mineral salt supplement, a supplement based on ground corn and another containing protected fat, under the same conditions of pasture. The cows had an average initial age of 36 months and 295.9 ± 20 kg of initial body weight. The evaluation period lasted from November 2006 to May 2007, the 24 days after delivery until weaning of calves to 192 days of age. Cows fed the supplement based on ground corn (351 g day -1 ) and protected fat (357 g day -1 ) showed a similar increase in body weight, which was higher in relation cows fed with the mineral mixture (179 g day -1 ). Mineral mixture supplementation resulted in body condition score loss of cows between 80 and 136 days after calving. Cows fed energy supplements of low consumption produced more milk, weaned heavier calves and showed higher pregnancy rate than those fed only with the mineral mixture. The use of 3% calcium salts of fatty acids in energy supplements of low consumption did not alter the productive and reproductive performance of primiparous Zebu cows. Key words: Calcium soaps of fatty acids, milk production, Nellore, pregnancy rate ResumoAvaliaram-se diferentes fontes energéticas em suplementos de baixo consumo sobre o desempenho produtivo e reprodutivo de vacas primíparas zebuínas manejadas em Brachiaria brizantha cv. Marandu. Foram utilizados 60 pares de vacas/bezerros (as) distribuídos em três tratamentos, suplemento padrão a base de mistura mineral, suplemento com grão de milho moído e suplemento contendo gordura protegida, sob as mesmas condições de pasto. As vacas apresentavam idade média inicial de 36 meses e 295.9 ± 20 kg de peso corporal médio inicial. O período de avaliação se estendeu de novembro de 2006 até maio de 2007, dos 24 dias após o parto até o desmame dos bezerros (as) aos 192 dias de idade. Vacas alimentadas com suplemento à base de grão de milho moído (351 g dia -1 ) e gordura protegida (357 g dia -1 ) apresentaram semelhante acréscimo de peso corporal, o qual foi superior às vacas alimentadas com mistura mineral (179 g dia -1 ). A suplementação com mistura mineral resultou em perda de escore corporal das vacas entre 80 e 136 dias após o parto. Vacas alimentadas com suplementos energéticos de baixo consumo apresentaram maior produção de leite, desmamaram bezerros mais pesados e

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“…The evaluation of total cholesterol can be a parameter to judge the productive capacity of milking cows, because it demonstrates the capacity of corporal fat mobilization and ingestion of energy to produce milk [10]. The significant increase of cholesterol also improves reproductive performance, because it is precursor of steroidal hormones such a progesterone [26]. An increase of total cholesterol in cows supplemented with calcium salts of fatty acids was reported [3].…”

Section: Discussionmentioning

confidence: 99%

Blood Parameters of Lactating Cows Fed Calcium Salts as Energetic Source

Martins

Cunha

Boscarato

et al. 2018

Acta Scientiae. Vet.

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Background:The negative energetic balance of lactating cows that occurs during the few weeks postpartum shifts the hormonal profile of the animal. These alterations may lead to metabolic disturbance as ketosis and lipid infiltration. Hypocalcemia is another metabolic problem that occurs in the peripartum period, it is characterized by the reduction in blood levels of calcium (Ca 2+ ) near birth. Blood parameters illustrates the nutritional status of milking cows. The serum levels of glucose, β-hydroxybutyrate (BHB) and cholesterol are parameters that reveal liver condition and it is very important for the metabolism of milking cows. The objective of this study was to evaluate three additives in the form of a calcium salts on blood parameters of lactating cows. Materials, Methods & Results:Two Latin square 4x4 were used, whereas one comprehended of early lactation cows and the other of mid lactation cows. Animals of 2nd and 3rd parity were used only. Parity was distributed evenly among groups. The trial consisted of 4 groups with 4 treatments as follow: T1: 300 g of calcium acetate, T2: 200 g of calcium propionate, T3: 200 g of calcium salts of fatty acids, and T4: control without any calcium additive. Blood samples were collected for analysis of serial calcium, glucose, β-hydroxybutyrate (BHBA) and cholesterol. The calcium levels were higher in T1 than T3 in early lactation. There was no significant difference of glucose levels between groups. Groups T1 and T2 had lower amounts of BHBA. Cholesterol was higher in T3 and T1 in the early lactation and just in T3 was higher in the mid lactation. Discussion: Adjust the Ca 2+ flow due to high feed consumption and milk production near birth is a big challenge for milking cows due to the difficulties to maintain normal serial levels of Ca 2+ in the early lactation. The lower serial levels of Ca 2+ in the group supplemented with calcium salts of fatty acids is due to its physical characteristics that reduces its effects on ruminal microbiota and also reduced absorption of fatty acids in intestine. The evaluation of total cholesterol can be a parameter to judge the productive capacity of milking cows, because it demonstrates the capacity of corporal fat mobilization and ingestion of energy to produce milk. An increase of total cholesterol in cows supplemented with calcium salts of fatty acids is justified by the higher intake of fatty acids in the feed containing fat, which leads to a greater lipid metabolism in blood. As the literature has limited information about calcium acetate, it is believed that the animals supplemented with calcium acetate showed higher levels of cholesterol because the acetate is converted to Acetyl coenzime A, it is the basis for cholesterol biosynthesis in lactating cows. The BHBA can be considered as an indicator of negative energetic balance due to its correlation between energetic demand and energy reserves. As propionate is produced by ruminal fermentation and is the principal source for gluconeogenesis in peripartum cows, it lowered level o...

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Metabólitos sanguíneos de vacas de corte suplementadas ou não com sais de cálcio de ácidos graxos durante o período pré e/ou pós-parto

Cited by 9 publications

References 18 publications

Metabolic status of crossbred Charolais × Nellore cows throughout the final third of gestation and lactation

Metabolic status of crossbred Charolais × Nellore cows throughout the final third of gestation and lactation

Energy sources in low intake supplements on the productive and reproductive performance of Zebu cows

Blood Parameters of Lactating Cows Fed Calcium Salts as Energetic Source

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