2018
DOI: 10.4025/actascianimsci.v40i1.42532
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Abstract: This study was developed to evaluate productive efficiency during the lactation period of cows with predominant Nellore genetic composition based on their body size. Cows were divided into the following categories: light (≤ 316 kg), moderate (≥ 317 and ≤ 400 kg), or heavy (≥ 401 kg). Body weight change and total gain from birth to 210 days of age of calves born from heavy cows (0.155±0.03 and 111.6±5.1 kg) were higher than those of calves born from light (0.064±0.03 and 91.0±4.3 kg) and moderate (0.144±0.03 an… Show more

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Cited by 8 publications
(8 citation statements)
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“…Under conditions of quantitative and qualitative limitations on grazing, these demands are generally not completely met, with the cows using their body reserves (Bohnert et al, 2013) to maintain production, affecting their performance as a result. While the cows are still growing, this may be aggravated by the greater body size of the cows and, consequently, their greater nutritional demand (Farias et al, 2018a), which can influence reproduction (Farias et al, 2018b;Bitencourt et al, 2020), or by the demands of growth competing with and affecting the reproductive performance and productivity of the herds, even when maintained under good nutritional conditions (Castilho et al, 2018).…”
Section: Discussionmentioning
confidence: 99%
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“…Under conditions of quantitative and qualitative limitations on grazing, these demands are generally not completely met, with the cows using their body reserves (Bohnert et al, 2013) to maintain production, affecting their performance as a result. While the cows are still growing, this may be aggravated by the greater body size of the cows and, consequently, their greater nutritional demand (Farias et al, 2018a), which can influence reproduction (Farias et al, 2018b;Bitencourt et al, 2020), or by the demands of growth competing with and affecting the reproductive performance and productivity of the herds, even when maintained under good nutritional conditions (Castilho et al, 2018).…”
Section: Discussionmentioning
confidence: 99%
“…Greater body weight in the calves at birth is a result of the greater body weight of the cows, which is associated with greater morphometric measurements and, consequently, a larger internal space for maintenance of the vital organs and the reproductive system in the abdominal cavity of heavy cows (Mota, Mariz, Ribeiro, Silva, & Lima, 2015), in addition to greater placental nutrition of the foetus, a phase that is crucial to its development (Funston et al, 2010). This can be seen in cows with a predominance of the Nellore breed, where those of larger body size produce heavier calves at birth, probably due to the limited space for embryonic and foetal development in the abdominal cavity of smaller cows (Farias et al, 2018a).…”
Section: Discussionmentioning
confidence: 99%
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“…This finding reinforces the fact that BMI is well-distributed between the classes (Table 1). In beef cows, higher body weights at calving and at the end of the breeding period translate into higher pregnancy rates (Farias et al, 2018a). This is because these variables indicate the nutritional status of the females during pregnancy and lactation.…”
Section: Resultsmentioning
confidence: 99%
“…A eficiência de produção em um rebanho de corte pode ser definida como a habilidade da vaca em transformar o alimento que ingere em peso de bezerro à desmama (Marque,s et al, 2016), sendo dependente ainda do tamanho corporal (Farias, et al, 2018), época de parição e idade (Bitencourt et al, 2020) e produção de leite das vacas (Lemes, et al, 2017).…”
Section: Introductionunclassified