A mechanistic model for predicting the nutrient requirements and feed biological values for sheep1

Cannas, Antonello; Tedeschi, L. O.; Fox, D. G.; Pell, Alice N.; Soest, P.J. Van

doi:10.2527/2004.821149x

Cited by 263 publications

(220 citation statements)

References 51 publications

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“…Fibre fractions were analysed according to the method described by Van Soest et al (1991). The metabolizable energy content of the experimental concentrates was estimated according to Cornell Net Carbohydrates and Protein System for sheep (Cannas et al, 2004).…”

Section: Animals and Dietsmentioning

confidence: 99%

The use of stoned olive cake and rolled linseed in the diet of intensively reared lambs: effect on the intramuscular fatty-acid composition

Mele

Serra

Pauselli

et al. 2014

Animal

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The aim of the present study was to evaluate the effect of the inclusion of stoned olive cake and rolled linseed in a concentratebased diet for lambs on the fatty-acid composition of polar and non-polar intramuscular lipids of the longissimus dorsi muscle. To achieve this objective, 32 Appenninica lambs were randomly distributed into four groups of eight lambs each and were fed conventional cereal-based concentrates (diet C); concentrates containing 20% on a dry matter (DM) basis of rolled linseed (diet L); concentrates containing 35% DM of stoned olive cake (diet OC); and concentrates containing both rolled linseed (10% DM) and stoned olive cake (17% DM; diet OCL). The concentrates were administered together with grass hay at a 20 : 80 forage : concentrate ratio. Growing performances and carcass traits were evaluated. The fatty-acid composition was analysed in the total intramuscular lipids, as well as in the polar and neutral lipids. The average feed intake and the growth performance of lambs were not affected by the dietary treatments, as a consequence of similar nutritional characteristics of the diets. The inclusion of rolled linseed in the L and OCL diets increased the content of C18:3 n-3 in intramuscular total lipids, which was threefold higher in meat from the L lambs and more than twofold higher in meat from the OCL lambs compared with the C and OC treatments. The n-6 : n-3 ratio significantly decreased in the meat from lambs in the L and OCL groups, reaching values below 3. The L treatment resulted in the highest level of trans-18:1 fatty acids in the muscle. Regardless of the dietary treatment, the t10-18:1 was the major isomer, representing 55%, 45%, 49% and 45% of total trans-18:1 for C, L, OC and OCL treatments, respectively. Neutral lipids from the OC-fed lambs contained the highest amount of c9-18:1 (more than 36% of total fatty acids); however, the content of c9-18:1 did not differ between the OC and C lambs, suggesting an intensive biohydrogenation of dietary c9-18:1 in the case of OC treatment. The highest content of c9,t11-18:2 was detected in the intramuscular fat from the L-fed lambs, followed by the OCL treatment. A similar trend was observed in the neutral lipid fraction and, to a lower extent, in the polar lipids.

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Section: Animals and Dietsmentioning

confidence: 99%

The use of stoned olive cake and rolled linseed in the diet of intensively reared lambs: effect on the intramuscular fatty-acid composition

Mele

Serra

Pauselli

et al. 2014

Animal

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“…3 FDN proveniente de forragem. 4 Estimado utilizando o modelo Small Ruminant Nutrition System, v.1.8.7 (Cannas et al, 2004;Tedeschi et al, 2008).…”

Section: Resultsunclassified

Substituição do feno de coastcross por casca de soja na alimentação de cabras em lactação

Gentil¹,

Susin²,

Pires³

et al. 2011

R. Bras. Zootec.

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Objetivou-se com este trabalho verificar a resposta de cabras em lactação alimentadas com dietas contendo casca de soja em substituição ao feno de coastcross. Trinta e seis cabras (38±5 dias em lactação; 2,1±0,4 kg/dia) foram distribuídas em delineamento experimental de blocos completos casualizados e confinadas por oito semanas. As dietas foram compostas de 50% de volumoso e 50% de concentrado e com o mesmo teor de fibra em detergente neutro. A casca de soja substituiu o feno de coastcross em 0, 33, 67 ou 100% da matéria seca (MS). O consumo de matéria seca e a eficiência alimentar apresentaram resposta quadrática aos teores de casca de soja na dieta. A produção de leite e a variação do peso corporal não foram alteradas, porém a concentração de gordura e lactose do leite aumentou e os tempos gastos com ruminação e mastigação decresceram com a inclusão da casca de soja na dieta. A casca de soja pode substituir totalmente o feno de coastcross em dietas para cabras em lactação, pois essa substituição não prejudica a produção de leite e aumenta o teor de gordura e lactose do leite. Em comparação ao feno picado de coastcross, a casca de soja apresenta menor efetividade em estimular a ruminação e a mastigação.

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“…(2) Estimativa obtida a partir da composição dos ingredientes da biblioteca de alimentos do "Small Ruminant Nutrition System" (Cannas et al, 2004).…”

Section: Methodsunclassified

“…As dietas foram isonitrogenadas -16% de proteína bruta -, formuladas pelo sistema "Small Ruminant Nutrition System" (Cannas et al, 2004), versão 1.8.1, e constituídas de 10% de volumoso (feno de coast-cross) e 90% de concentrado na matéria seca, e diferiu quanto à fonte principal de proteína: farelo de soja, farelo de amendoim, farelo de canola ou farelo de algodão, constituindo os tratamentos experimentais (Tabela 1).…”

Section: Introductionunclassified

Desempenho de cordeiros e estimativa da digestibilidade do amido de dietas com diferentes fontes protéicas

Queiróz¹,

Susin²,

Pires³

et al. 2008

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a infl uência de fontes protéicas sobre desempenho, características da carcaça e da carne de cordeiros confi nados, e estimar a digestibilidade do amido de rações com alta proporção de grãos. Foram distribuídos 28 cordeiros Santa Inês, em blocos completos ao acaso, de acordo com o peso vivo e a idade, no início do experimento. As fontes protéicas foram os farelos de: soja, amendoim, canola e algodão, em dietas isonitrogenadas com 90% de concentrado e 10% de volumoso (feno de coast-cross). Na determinação da digestibilidade, foram utilizados quatro borregos em delineamento experimental em quadrado latino 4x4, e a digestibilidade do amido foi estimada a partir do teor de amido fecal. Não houve diferenças (p>0,05) quanto ao consumo de matéria seca, ganho de peso vivo médio, conversão alimentar, características da carcaça e da carne, entre as fontes protéicas avaliadas. A digestibilidade do amido apresentou coefi ciente de determinação de 93%. Independentemente da fonte protéica utilizada, o teor de amido nas fezes é um indicador efi ciente na estimativa da digestibilidade do amido de dietas com alta proporção de concentrado para cordeiros.Termos para indexação: amido fecal, características da carcaça, características da carne, ovinos. Lamb performance and estimation of starch digestibility of diets with different protein sourcesAbstract -The objective of this work was to evaluate the infl uence of protein sources on feedlot lambs performance, carcass and meat characteristics, and to estimate starch digestibility of high grain diets. Twenty-eight Santa Inês ram lambs were selected in a complete randomized block design, according to body weight and age in the beginning of the experiment. Protein sources were the following meals: soybean, peanut, canola, and cottonseed in isonitrogenous diets with 90% concentrate and 10% roughage (coast-cross hay). Four ram lambs (48 kg) were used to determine starch digestibility in a 4x4 latin square design, and starch digestibility was estimated by fecal concentration of starch. There were no differences (p>0.05) for dry matter intake, average daily gain, feed conversion, carcass characteristics and meat quality, among the protein sources evaluated. Determination coeffi cient for starch digestibility was 93%. Fecal starch content is an accurate indicator of the starch digestibility estimation in lambs feeding high grain diets, independently of the protein source used.

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A mechanistic model for predicting the nutrient requirements and feed biological values for sheep1

Cited by 263 publications

References 51 publications

The use of stoned olive cake and rolled linseed in the diet of intensively reared lambs: effect on the intramuscular fatty-acid composition

The use of stoned olive cake and rolled linseed in the diet of intensively reared lambs: effect on the intramuscular fatty-acid composition

Substituição do feno de coastcross por casca de soja na alimentação de cabras em lactação

Desempenho de cordeiros e estimativa da digestibilidade do amido de dietas com diferentes fontes protéicas

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