Produtividade e eficiência de produção de vacas de diferentes grupos genéticos submetidas a pastagens cultivadas no pré ou pós-parto

Vaz, Ricardo Zambarda; Restle, João; Pacheco, Paulo Santana; Vaz, Fabiano Nunes; Filho, Dari Celestino Alves; Brondani, Ivan Luiz; Pascoal, Leonir Luiz; Argenta, Flânia Mônego

doi:10.5433/1679-0359.2014v35n5p2697

Cited by 4 publications

(8 citation statements)

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“…Apesar de as ovelhas grandes serem mais pesadas ao parto e ao desmame, as mesmas não foram mais eficientes nas avaliações produtivas quando comparadas com as de estrutura médias. Normalmente, em outras espécies de ruminantes, como as vacas de corte, as fêmeas de tamanho menor são mais eficientes na produção de kg de bezerros, em relação às fêmeas grandes, principalmente em condições de escassez alimentar (20) .…”

Section: Resultsunclassified

Eficiência Produtiva De Ovelhas Com Diferentes Características Conformacionais Sob Pastejo

et al. 2017

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Resumo: Objetivou-se avaliar a eficiência produtiva de ovelhas Corriedale de diferentes condições e estruturas corporais ao parto, mantidas em pastagem natural e/ou cultivada hibernal. Ao parto, as fêmeas foram classificadas em médias (frame = 50 a 57,5 kg) e grandes (frame = 57,6 a 62 kg) quanto ao tamanho e em média (2 a 3 pontos) ou alta (3,5 a 4,5 pontos) quanto ao escore de condição corporal. O delineamento experimental utilizado foi o inteiramente casualizado em arranjo fatorial 2 x 2 (dois grupos de estruturas corporais x duas classes de escore de condição corporal). Ovelhas com frame médio foram mais leves em relação às grandes ao parto (39,97 vs 48,16 kg, respectivamente) e ao desmame (43,10 vs 50,22 kg, respectivamente). As eficiências produtivas ao parto e ao desmame não diferiram entre ovelhas médias (46,91 e 44,24 kg) e grandes (47,83 e 45,69 kg), respectivamente. Ovelhas com condição corporal média ao parto quando comparadas com ovelhas de condição corporal alta não apresentaram diferenças significativas para eficiência produtiva ao parto (46,89 vs. 47,82 kg) e ao desmame (44,10 vs. 45,83 kg). O tamanho animal e o escore de condição corporal ao parto não influenciam a eficiência produtiva dos rebanhos ovinos sob pastejo. Palavras-chave: Condição corporal; Corriedale; desmame; frame; parto.Abstract: This study was carried out to evaluate the productive efficiency of Corriedale sheep of different conformation traits, reared on natural and/or cultivated winter pastures. At calving, the females were classified as medium (frame = 50 to 57.5 kg) and large (frame = 57.6 to 62 kg) regarding the size and as average (2 to 3 points) or high (3.5 to 4.5 points) regarding the body condition score. The experimental design was entirely randomized in a 2 x 2 factorial arrangement (two groups of body weights x two classes of body condition at calving). Sheep with medium body structure were lighter compared to large ones at calving (39.97 vs 48.16 kg, respectively) and at weaning (43.10 vs 50.22 kg, respectively). The production efficiency at calving and at weaning did

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Section: Resultsunclassified

Eficiência Produtiva De Ovelhas Com Diferentes Características Conformacionais Sob Pastejo

et al. 2017

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“…As the weight of the cow increased, the ratio between calf kilogram per cow kilogram decreased. This ratio can be improved by using better nutritional levels in herds (RIBEIRO et al, 2001;VAZ et al, 2014) and more efficient technologies to increase calving rate . This relationship may have an important impact on the breeding sector, especially because heavier cows are sometimes preferred by producers.…”

Section: Resultsmentioning

confidence: 99%

“…Besides the choice of an animal size suitable to the conditions of the production system, the probable production of kilograms of calves per cow kept in breeding herds can be improved using technologies to increase the calving rate or the development of calves with improvements in the breeding herd feeding levels (VAZ et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

“…However, in order to analyze herd efficiency, in addition to calf weight, the relationship to cow weight and the subsequent reproduction thereof must be taken into account (VAZ et al, 2014). Reproduction must be linked to efficiency due to a change in nutrients' priority at each physiological state of the animal.…”

Section: Introductionmentioning

confidence: 99%

“…The efficiency of breeding herds can be improved through early weaning (VAZ; , adjusting the available forage (FAGUNDES et al, 2003), use of cultivated grasslands and adapted genetic groups (ÍTAVO et al, 2014;VAZ et al, 2014), adjustment of the calving season, increased body condition scores, and selection of cow age (VIEIRA et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Biological efficiency of Charolais beef cows of different body sizes

Farias

Cerdótes

Vaz

et al. 2018

SCA

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This study aimed to evaluate the production, reproductive performance, and productive efficiency of predominantly Charolais cows and their calves (Straightbred, ¾ C, ¼ N) according to body size at calving. Sixty-three cow-calf pairs were used and classified into three weight groups: Light (331.3±5.8 kg), Moderate (385.9±5.3 kg), and Heavy (424.4±6.2 kg). The classes were formed using half standard deviations above or below the average weight of the cows at calving. For each pair, the body weight was evaluated at calving, at weaning (63 days), at the beginning and at end of the reproductive period, and at 9 months for the calves. Pregnancy rates were similar (P > 0.05) between weight groups. The calves did not differ (P > 0.05) in terms of body weight and weight gain from calving until pregnancy diagnosis (210 days). The heavy cows had greater weight variations from 210 days to 270 days than the light cows. The calf production rate (kg calf/cow kept in herds) did not differ between weight groups. However, in relation to the weight of the cows at 210 days, light cows were 11.28% and 13.02% more productive (P < 0.05), than moderate and heavy cows, respectively. Light cows were more efficient than the other classes of cows at calving and at 210 days old. Our simulations showed that there were more kilograms for sale in herds of light cows (53.085 kg) than moderate and heavy cows (52.310 and 52.870 kg, respectively), while maintaining the structures of the herd constant. The size of the Charolais cow did not influence the weight of calves from calving until 7 months of age or their reproductive performance provided they were weaned early. The need for space for the maintenance of the cow-calf pair increased as the weight of the cows increased. In herds with smaller cows, higher numbers and a higher production of weight for sale are observed than in herds with moderate and heavy cows. Light cows were the most efficient at calving and during pregnancy diagnosis at 210 days.

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Effect of endoparasites occurrence in sows from intensive production system

Oliveira

Carvalho

Silveira

et al. 2019

Rev. Bras. Parasitol. Vet.

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The goal of this study was to assess the effect of farm size (FS) and farrowing order (FO) on the occurrence of endoparasites eggs in commercial sows housed in maternity and gestation areas during the period from May to July 2014. Forty-three piglet production units were classified by FS: small (100 to 250 sows), medium (251 to 510 sows), large (511 to 1,000 sows) and very large (more than 1,000 sows). Sows were classified by FO: up to two, three to five or more than five parturitions. Faecal samples were processed using the simple flotation technique in a hypersaturated salt solution (30-35% NaCl). The results revealed that the overall prevalence of gastrointestinal endoparasites obtained in this study was 12.47%, in that 4.64% were positive for Ascaris suum, 0.56% for Trichuris suis and 8.27% for coccidia oocysts. The prevalence of endoparasites obtained for small and medium size farm, and for large and very large farm was 34.58% and 15.52%, respectively. In conclusion, the study shows that more than half of the farms were positive for A. suum and coccidia oocysts, but mainly for younger females. In general, sows with up to two parturitions and small farms showed a higher endoparasites percentage.

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Produtividade e eficiência de produção de vacas de diferentes grupos genéticos submetidas a pastagens cultivadas no pré ou pós-parto

Cited by 4 publications

References 11 publications

Eficiência Produtiva De Ovelhas Com Diferentes Características Conformacionais Sob Pastejo

Eficiência Produtiva De Ovelhas Com Diferentes Características Conformacionais Sob Pastejo

Biological efficiency of Charolais beef cows of different body sizes

Effect of endoparasites occurrence in sows from intensive production system

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