Desempenho de bezerros da raça Nelore e cruzados desmamados recebendo concentrado em pastagem adubada de Cynodon dactylon cv. Coastcross

Cruz, G. M. da; Rodrigues, A. de A.; Túllio, R. R.; Alencar, M. M. de; Alleoni, Guilherme Fernando; Oliveira, Gilson Pereira de

doi:10.1590/s1516-35982009000100018

Cited by 16 publications

(8 citation statements)

References 14 publications

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“…This might be the result of better performance of F1 animals compared to the ones with higher percentage of European genetics in their composition, which has been observed in different experiments. Similar results were obtained by Cruz et al (2009) when evaluating Nellore, ½Canchim-½Nellore, ½Angus-½Nellore and ½Simmental-½Nellore. Table 4.…”

Section: Genetic Groupsupporting

confidence: 83%

Biological and economic performance of genetic groups under different diets

Euclides¹,

Costa²,

Filho³

et al. 2018

Biosci. J.

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A grazing trial to evaluate biological and economic efficiencies for rearing young animals exclusively on pasture from weaning at 7 months of age, with average initial weight of 220 ± 12 kg, to slaughter was conducted from May 2006 to October 2007. Two levels of combined supplementation during the first dry period and four genetic groups (F1 Angus-Nellore; ½Braford-¼Angus-¼Nellore; ½Brahman-¼Angus-¼Nellore; and ⅝Charolais-⅜Nellore) were used following a 4 by 2 factorial arrangement and eight replications in a completely randomized design. During both dry periods, eight paddocks of deferred Brachiaria brizantha were utilized. During the first dry period, concentrated mix (CM) and protein-mineral mixture (PMM) were provided in quantities of 0.8% and 0.2% of body weight (BW), respectively, for 142 days. During the subsequent rainy period, the animals were transferred to eight guinea grass paddocks for 197 days. During the second dry period, the animals were allocated to the same eight palisade grass paddocks used during the previous dry season. Steers had received supplementary diet with the same CM used before at 0.8% of BW. Animals supplemented with CM gained more BW than those supplemented with PMM; however, during the rainy season, steers supplemented with PMM performed better than those receiving CM during the preceding dry period. Using concentrate since the first dry season is a risky option in economic terms, as only the Angus-Nellore group showed a positive but small gain.

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Section: Genetic Groupsupporting

confidence: 83%

Biological and economic performance of genetic groups under different diets

Euclides¹,

Costa²,

Filho³

et al. 2018

Biosci. J.

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“…Almost 90% of the Brazilian herds belong to the Bos indicus genotype, which is habituated to the tropical conditions, but has some unwanted characteristics in this climate, such as low meat production (AZEVEDO et al, 2005;RIBEIRO et al, 2009). One of the strategies to increase meat production is to use genetically improved animals (CRUZ et al, 2009), because the genotype influences the performance of the animals (PIMENTEL et al, 2005), and crossbreeding allows the use of the genetic capacity of the animals, which allows the producer to take advantage of the complementarity of different breeds (PADUA et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Growth performance and carcass characteristics of Nelore Angus and Nelore Angus Guzera crossbreed cows fed with supplemented pasture during the yearling and feedlot stages

Mesquita

Castagnara

Oliveira

et al. 2016

SCA

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The objective of this study was to evaluate the growth performance of two crossbreed genetic groups, ½ Nelore ½ Angus and ¼ Nelore ¼ Angus ½ Guzera, which originate from the rotational crosses of Nellore cows with Angus bulls and ½ Nellore ½ Angus cows with Guzera bulls, respectively. The growth performance was evaluated at the end of the yearling and feedlot stages, and carcass characteristics were evaluated after the slaughter. A completely randomized trial design was used, with 12 cows in each group. The yearling stage lasted 270 days, and the cattle were fed with pasture of Brachiaria brizantha 'Marandu' with 2.0 UA ha -1 and a forage allowance of 2.5 kg of dry matter (DM) per 100 kg of live weight (LW), during this stage the animals, with an average age of 365 ± 10 days, received protein and energy supplementation ad libitum. After the yearling stage, the cows were confined until they reached the age of 22-24 months and received 6.0 kg DM of sugar cane + urea and 4.0 kg DM of concentrate, with 150 g kg -1 of crude protein (CP), daily during 90 days. The daily average weight gain (DAWG) during the yearling stage was higher for the ½ Nelore ½ Angus group. The ¼ Nelore ¼ Angus ½ Guzera group reached higher slaughter weight because they had higher DAWG during the feedlot stage (1.022 vs. 728 g dia -1 ). No significant difference (P>0.05) was found between the groups when the hot carcass weights were compared. The ½ Nelore ½ Angus group reached a higher carcass weight percentage (53 vs. 50 %) and subcutaneous fat thickness (4.3 vs. 4.0 mm).

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“…O fato é agravado quando manejado de forma extensiva, pois com a permanência constante dos animais sobre a área, a curva de desempenho animal apresentase semelhante à das forrageiras, devido à baixa disponibilidade e qualidade da pastagem (CRUZ et al, 2009). Aliado a esses problemas tem-se utilizado como estratégias para minimizar os impactos, a suplementação alimentar com concentrados energéticos e protéicos (MANELLA; LOURENÇO; LEME, 2002).…”

Section: Introductionunclassified

Produção e composição química-bromatológica de Tifton 85 (Cynodon dactylon L. Pers) sob pastejo contínuo no período hibernal

et al. 2013

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ResumoO objetivo do presente trabalho foi avaliar o comportamento produtivo e qualitativo dos constituintes estruturais da pastagem de Tifton 85, no período de maio a setembro de 2010, submetido ao pastejo. O experimento foi realizado no município de Luiziana, região Noroeste do estado do Paraná. Avaliouse a produção total de massa de forragem, de lâminas foliares, colmos e material morto e a relação folha:colmo. A composição química-bromatológica foi determinada por meio das análises de fibra em detergente neutro (FDN) e ácido (FDA), proteína bruta (PB), e estimados os valores de nutrientes digestíveis totais (NDT) e digestibilidade da matéria seca (DMS). Também foi avaliada a taxa de lotação e a oferta de forragem. Verificou-se diminuição na massa de forragem, de lâminas foliares, colmos e material morto, consequentemente, reduziu-se a oferta que variou de 11,07 a 13,64 kg MS/100kg de peso vivo. As lâminas foliares apresentaram diminuição da qualidade com o avanço dos períodos experimentais em virtude de seus teores de FDN e PB. Os demais constituintes não apresentaram diferenças no período de março a setembro, evidenciando que a pastagem de tifton 85 mantém seus valores nutritivos elevados mesmo em períodos críticos do ano, diminuindo apenas sua produtividade. Palavras-chave: Massa de forragem, variações climáticas, qualidade bromatológica AbstractThe objective of this study was to evaluate the production and quality of structural components of Tifton 85 pasture, in the period from May to September 2010, submitted to the grazing. The experiment was carried out at Luiziana, Northwest region of Paraná State. It was evaluated the total production of forage mass, leaf blades, stems and dead material, and the leaf:stem ratio. The chemical-bromatological composition was determined through analysis of neutral detergent fiber (NDF), acid detergent fiber (ADF), crude protein (CP), and estimated valuesof total digestible nutrients (TDN) and dry matter digestibility (DMD). Stocking rate and forage allowance were evaluated. It was verified a decrease in forage mass, leaves blades, stems and dead material, and therefore decreased the supply ranging from 11.07 to 13.64 MS/100kg kgbody weight. The leaf blades showed a decrease in quality with the advance of trial periods due to their NDF and CP content. The other constituents did not differ in the period from

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Desempenho de bezerros da raça Nelore e cruzados desmamados recebendo concentrado em pastagem adubada de Cynodon dactylon cv. Coastcross

Cited by 16 publications

References 14 publications

Biological and economic performance of genetic groups under different diets

Biological and economic performance of genetic groups under different diets

Growth performance and carcass characteristics of Nelore Angus and Nelore Angus Guzera crossbreed cows fed with supplemented pasture during the yearling and feedlot stages

Produção e composição química-bromatológica de Tifton 85 (Cynodon dactylon L. Pers) sob pastejo contínuo no período hibernal

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