Exigências de energia de borregas mestiças alimentadas com níveis crescentes de concentrado na dieta

Morais, M.G.; Fernandes, Henrique Jorge; Oliveira, L.B.; Ribeiro, Caroline Bertholini; Souza, Aparecido Ribeiro de; Franco, Gumercindo Loriano; Ítavo, Camila Celeste Brandão Ferreira; Ítavo, Luís Carlos Vinhas; Melo, Gleice Kelli Ayardes de; Walker, Catherine Cecília

doi:10.1590/1678-4162-8735

Cited by 3 publications

(3 citation statements)

References 5 publications

(1 reference statement)

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“…Smaller body size animals in this study demanded less metabolizable energy requirements for maintenance, but higher estimated metabolizable energy requirements for weight gain (MORAIS et al, 2016). In the growing phase requirements for weight gain are higher because in lighter animals muscle tissue synthesis predominates, and this is considered a less energy efficient process due to increased deposition of water (OWENS et al, 1993).…”

Section: Equationsmentioning

confidence: 74%

“…On the other hand, due to their larger size, the ewe lambs treated with 80% concentrate in the finishing phase had higher metabolizable energy requirements for maintenance, reducing the availability of net energy for gain (MORAIS et al, 2016). According to MORAIS et al (2016), the largest ewe lambs, supplemented with 80% concentrate, used TDN similarly to the ewe lambs subjected to other treatments, but as they continued depositing higher proportions of fat, a more efficient biochemical process than muscle tissue synthesis, those animals achieved more weight gain for the same net energy.…”

Section: Equationsmentioning

confidence: 99%

“…According to MORAIS et al (2016), the largest ewe lambs, supplemented with 80% concentrate, used TDN similarly to the ewe lambs subjected to other treatments, but as they continued depositing higher proportions of fat, a more efficient biochemical process than muscle tissue synthesis, those animals achieved more weight gain for the same net energy. According to Owens et al (1993), the greater the proportion of fat in the growth, the higher the weight gain.…”

Section: Equationsmentioning

confidence: 99%

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Growing and finishing crossbred feedlot ewe lambs fed with increasing levels of concentrate in the diet

Ribeiro

Morais

Souza

et al. 2016

SCA

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To maximize economic gain in sheep production systems it is critical to adjust feedlot diets to maximize performance while minimizing feed, and especially concentrate, waste. Little information is available on ideal diets for crossbred ewe lambs. Therefore, this study aimed to evaluate the performance of feedlot crossbred ewe lambs, and the digestibility of diets, with increasing levels of concentrate during the growing and finishing phases. Twenty-four crossbred Texel × Pantaneira Texel ewe lambs were confined and fed Tifton hay with increasing levels of concentrate in the diet (20, 40, 60 and 80%) for individual evaluation of dry matter intake (DMI), digestibility of diets, average daily gain (ADG) and feed efficiency (FE). Animals were slaughtered at 47 kg. In the growing phase, the inclusion of concentrate in the diets (1176 g.kg -1 ) did not change DMI (p > 0.05). Concentrate levels had a quadratic effect (p < 0.05) on the dry matter digestibility coefficient (DMDC) and on total digestible nutrients (TDN) during the growing phase. In the finishing phase, there was a negative linear effect of concentrate levels on DMI (p < 0.05), but TDN intake was similar among the experimental diets (p > 0.05). DMDC and TDN values displayed a quadratic behavior (p < 0.05), plateauing at 60% concentrate. ADG and FE increased as concentrate was added to the diet in the growing phase (p < 0.05). During the finishing phase, lamb performance was similar (p > 0.05) for different diets. Thus, the use of 60% concentrate in the confined crossbred ewe lamb diet during growing and 20% concentrate during finishing is recommended. Key words: Feedlot. Digestibility coefficient. Intake. Weight gainh. ResumoPara maximizar o ganho econômico em sistemas de produção de ovinos é fundamental ajustar as dietas de confinamento para aumentar o desempenho e minimizar os custos e desperdícios com alimentação, especialmente com concentrado. Existem poucas informações sobre avaliação de dietas ideais para cordeiras mestiças. Objetivou-se avaliar o desempenho de cordeiras mestiças confinadas e a digestibilidade de dietas com níveis crescentes de concentrado durante as fases de recria e terminação. Foram confinadas 24 fêmeas mestiças Texel (1/2 Pantaneira x 1/2 Texel) alimentadas com feno de capim-Tifton e níveis crescentes de concentrado na dieta (20, 40, 60 e 80%) para avaliação individual do consumo de matéria seca (CMS), digestibilidade dos nutrientes das dietas, ganho médio diário (GMD) e eficiência alimentar (EA). Os animais foram abatidos com 47 kg. Na fase de recria, o CMS não foi alterado (p > 0,05) pela inclusão de concentrado nas dietas (1176 g kg -1 ). Foi observado efeito quadrático dos níveis de concentrado (p < 0,05) sobre os coeficientes de digestibilidade de matéria seca (CDMS) e nutrientes digestíveis totais (NDT) durante a recria. Na fase de terminação, houve efeito linear negativo dos níveis de concentrado sobre o CMS (p < 0,05), porém a ingestão de NDT foi similar entre as dietas experimentais (p > 0,05). O CDMS e o valor...

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Section: Equationsmentioning

confidence: 74%

Section: Equationsmentioning

confidence: 99%

Section: Equationsmentioning

confidence: 99%

See 1 more Smart Citation

Growing and finishing crossbred feedlot ewe lambs fed with increasing levels of concentrate in the diet

Ribeiro

Morais

Souza

et al. 2016

SCA

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Economic impact of poisoning by Brachiaria grass in lambs from birth to finishing receiving to different levels of supplementation

Melo

Ítavo

et al. 2022

Trop Anim Health Prod

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Analysis of factors of production in the termination of feedlot lambs to pasture

Pereira

Ítavo

Mateus

et al. 2018

Arq. Bras. Med. Vet. Zootec.

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The objective of this study was to analyze the factors that influence the performance of lambs in pasture confinement, by substituting a concentrate with different levels of the aerial part of cassava in relation to hematocrit indices. The experiment was conducted at the Sheep Technology Center using 56 Pantaneira sheep, of which 28 were male and 28 were female. For female lambs, the globular volume showed a decreasing quadratic effect, with a minimum inclusion of 10.24% PAM in the diet for a hematocrit index of 32.28. A linear effect was observed for the mean crude protein intake in the male lambs based on the diet provided and was estimated to be equivalent to 87.4% of the lambs’ final weight. In conclusion, mean crude protein consumption is most strongly correlated with the final weight of male lambs, and NDF is most strongly correlated with the final weight of female lambs, with the level of cyanide consumption influencing the average daily weight gain in female lambs. The hematocrit level of the male lambs decreased with an increase in the inclusion of the aerial part of cassava in the ration of the animals.

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Exigências de energia de borregas mestiças alimentadas com níveis crescentes de concentrado na dieta

Abstract: Exigências de energia de borregas mestiças alimentadas com níveis crescentes de concentrado na dieta

Cited by 3 publications

References 5 publications

Growing and finishing crossbred feedlot ewe lambs fed with increasing levels of concentrate in the diet

Growing and finishing crossbred feedlot ewe lambs fed with increasing levels of concentrate in the diet

Economic impact of poisoning by Brachiaria grass in lambs from birth to finishing receiving to different levels of supplementation

Analysis of factors of production in the termination of feedlot lambs to pasture

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