The effect of oral calcium boluses at parturition on blood metabolites and milk yield in grazing Holstein cattle

Meléndez, P.; Roeschmann, C.; Arevalo, A.; Møller, Jan

doi:10.1016/j.livsci.2021.104510

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…Furthermore, corroborating our findings, in a study also conducted in southern Chile, it was observed that plasma concentrations of tCa did not differ in second lactation cows between the day of calving and 7 days pp, but it increased significantly from calving to 7 days pp in cows ≥ 3 lactations. It was also reported that tCa concentrations were lower as the lactation number increased (Melendez et al, 2021).…”

Section: Discussionmentioning

confidence: 91%

Plasma Ionized Calcium and Magnesium Concentrations and Prevalence of Subclinical Hypocalcemia and Hypomagnesemia in Postpartum Grazing Holstein Cows from Southern Chile

Meléndez

López

Lama³

et al. 2022

SSRN Journal

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Section: Discussionmentioning

confidence: 91%

Plasma Ionized Calcium and Magnesium Concentrations and Prevalence of Subclinical Hypocalcemia and Hypomagnesemia in Postpartum Grazing Holstein Cows from Southern Chile

Meléndez

López

Lama³

et al. 2022

SSRN Journal

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“…At present, most farms use the commercial product Ca bolus as a supplement, and its main components are CaCl 2 and CaSO 4 . In addition, there are other forms of calcium supplements, such as Ca gel, Ca tubes and Ca fluid preparation (8,(24)(25)(26)(27)(28)(29)(30)(31). Although Valldecabres et al conducted a meta-analysis, it was revealed that oral Ca supplements were not associated with milk yield or pregnancy rate at first service (32).…”

Section: Introductionmentioning

confidence: 99%

Effects of oral calcium on reproduction and postpartum health in cattle: a meta-analysis and quality assessment

Ma,

Zhao

et al. 2024

Front. Vet. Sci.

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Postpartum blood calcium (Ca) concentration is related to the reproduction and health of cattle. Oral calcium supplements were given to dairy cows after calving to increase blood Ca concentration and reduce the risk of hypocalcemia. However, studies have shown that oral Ca has different effects in preventing disease. The purposes of this study were (i) to conduct a meta-analysis to evaluate the expected effect of oral Ca on incidence of calving-related diseases, pregnancy risk and milk yield in dairy cows, and (ii) to make a quality assessment of these related studies. In total, 22 eligible studies were included in this review. Meta-analysis showed that oral Ca could significantly reduce the incidence of hypocalcemia (clinical hypocalcemia: relative risk (RR) = 0.67, 95% confidence interval (CI) = [0.52, 0.87]; subclinical hypocalcemia: RR = 0.81, CI = [0.72, 0.91]), and incidence of retained placenta (RR = 0.77, CI = [0.62, 0.95]), improved blood Ca concentrations: mean difference (MD) = 0.08; 95% CI = [0.04, 0.11]. For other results, the meta-analysis revealed a lack of evidence of the correlation between oral Ca and serum magnesium (Mg) / phosphorus (P) concentration (Mg: MD = −0.04; 95% CI = [−0.10, 0.02]; P: MD = 0.05; 95% CI = [−0.10, 0.21]) or incidence of other calving-related disorders (metritis: RR = 1.06, CI = [0.94, 1.19]; ketosis: RR = 1.04, CI = [0.91, 1.18]; mastitis: RR = 1.02, CI = [0.86, 1.21]; displacement of the abomasum: RR = 0.81, CI = [0.57, 1.16]) or pregnancy risk (pregnancy risk at first service: RR = 0.99, CI = [0.94, 1.05]; overall pregnancy rate: RR = 1.03, CI = [0.98, 1.08]) or milk yield (MD = 0.44; 95% CI = [−0.24, 1.13]). The distribution of the funnel plot formed by the included studies was symmetrical, and the Egger’s test had a p > 0.05, indicating that there was no significant publication bias. Sensitivity analyses results suggested that the results of meta-analysis are robust. Quality assessment of the included studies revealed that the risk of bias was focused on selection bias, performance bias, detection bias and other sources of bias, and the future research should focus on these aspects.

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Review: Dietary cation-anion difference to prevent hypocalcemia with emphasis on over-acidification in prepartum dairy cows

Meléndez¹,

Chelikani²

2022

animal

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The effect of oral calcium boluses at parturition on blood metabolites and milk yield in grazing Holstein cattle

Cited by 5 publications

References 33 publications

Plasma Ionized Calcium and Magnesium Concentrations and Prevalence of Subclinical Hypocalcemia and Hypomagnesemia in Postpartum Grazing Holstein Cows from Southern Chile

Plasma Ionized Calcium and Magnesium Concentrations and Prevalence of Subclinical Hypocalcemia and Hypomagnesemia in Postpartum Grazing Holstein Cows from Southern Chile

Effects of oral calcium on reproduction and postpartum health in cattle: a meta-analysis and quality assessment

Review: Dietary cation-anion difference to prevent hypocalcemia with emphasis on over-acidification in prepartum dairy cows

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