Wheat Straw and Urea in Pelleted Rations for Growing-Fattening Sheep

Bhattacharya, A. N.; Khan, Adnan

doi:10.2527/jas1973.371136x

Cited by 3 publications

(2 citation statements)

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“…Barley straw v. wheat straw. Wheat straw is plentiful in many areas although experimentation suggests that its nutritive value and consumption are not high (Levy & Holzer, 1971;Louw, Steenkamp & van der Merwe, 1972;Bhattacharya & Khan, 1973;O'Donovan & Ghadaki, 1973;Sharma & Jhanwar, 1973;Leibholz, 1975). When fed long in Expts 2 and 3, diets containing wheat straw resulted in 100 g less daily live-weight gain than diets containing barley straw, independently of level of protein.…”

Section: Discussionmentioning

confidence: 99%

The effects of grinding, either with or without NaOH treatment, on the utilization of straw by yearling dairy cattle

Smith¹,

Broster²,

Broster³

et al. 1981

J. Agric. Sci.

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SUMMARYProcessed straw, both ground and ground–NaOH treated, has been compared with long straw in diets of straw and concentrates fed to yearling dairy heifers. Protein allowances were varied by the addition of fishmeal.Improved growth rate was consistently observed with those animals receiving fishmeal. When a fixed amount of barley straw was offered neither digestibility nor growth was affected by the form of the straw. With wheat straw grinding–NaOH treatment resulted in increased growth when fed in diets containing some long roughage. Voluntary intake of straw was additively increased by grinding and by treatment with 5% (w/w) NaOH. Ground-NaOH treatment of straw increased in vitro digestibility.

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Section: Discussionmentioning

confidence: 99%

The effects of grinding, either with or without NaOH treatment, on the utilization of straw by yearling dairy cattle

Smith¹,

Broster²,

Broster³

et al. 1981

J. Agric. Sci.

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“…BHATTACHARYA e KHAN (1973), quando substituíram farelo de soja por uréia até o nível de 2%, não constataram diferenças nos coeficientes de digestibilidade para MS, PB e EE. O mesmo foi observado por MAYER et al (1997) e SANTOS et al (1998, ao trabalharem com vacas alimentadas com ração contendo farelo de soja, farinha de peixe e uréia (0,8%).…”

Section: Variáveis Teores De Nnp (%) CV (%) Punclassified

Uréia para vacas em lactação: 1. Consumo, digestibilidade, produção e composição do leite

Silva

Valadares²,

Filho³

et al. 2001

R. Bras. Zootec.

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RESUMO -Este trabalho foi conduzido, utilizando 15 vacas lactantes (Holandês x Gir) alimentadas à vontade com rações isoprotéicas, constituídas na base da matéria seca (MS) de 60% de silagem e 40% de concentrado, contendo 0; 0,7; 1,4; e 2,1% de uréia, correspondentes aos teores de 2,08; 4,01; 5,76; e 8,07% de proteína bruta na forma de compostos nitrogenados não-protéicos (NNP), com o objetivo de avaliar os consumos e as digestibilidades aparentes de matéria seca (MS), matéria orgânica (MO), proteína bruta (PB), extrato etéreo (EE), carboidratos totais (CHO) e fibra em detergente neutro (FDN) e os consumos de nutrientes digestíveis totais (NDT). Também foram avaliadas possíveis alterações na produção e composição do leite. As vacas apresentaram peso vivo médio inicial de 511,8 kg e foram distribuídas ao acaso entre tratamentos. O período experimental teve duração de 90 dias para cada vaca, iniciando-se imediatamente após o parto. A fibra em detergente ácido indigestível (FDAI) foi usada como indicador para a determinação da digestibilidade aparente dos nutrientes. Os resultados obtidos foram interpretados estatisticamente por análises de variância e regressão. A adição de quantidades crescentes de NNP à dieta apresentou efeito linear decrescente sobre os consumos de MS, MO, FDN, PB, EE, CHO e NDT. Não foram observados efeitos dos níveis de NNP sobre as digestibilidades aparentes de MS, MO, PB, CHO e FDN. Para o EE, foi observado efeito quadrático, sendo a máxima digestibilidade de 89,12% obtida com teor estimado de 4,73% de NNP na MS. A produção máxima de leite, de 20,10 kg/dia, foi obtida com o teor estimado de 4,79% de NNP, ou 0,7% de uréia na MS total das rações. Observou-se redução linear do teor de gordura com o aumento dos teores de NNP nas rações, enquanto a proteína se comportou de forma quadrática, sendo o teor máximo de 3,4% estimado com 3,88% de NNP. Palavras-chave: ingestão, nitrogênio não protéico (NNP)Urea for Dairy Cows. 1. Intake, Digestibility, Milk Production and Composition ABSTRACT -This work was carried out, using 15 dairy cows (Holstein x Gyr) full fed isoproteic diets with 60% silage and 40% concentrate in the dry matter (DM) basis and 0, 0.7, 1.4, and 2.1% urea, correspondent to 2.08, 4.01, 5.76, and 8.07% of crude protein levels in the form of non protein nitrogen compounds (NNP), with the objectives to evaluate the intakes and the apparent digestibilities of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), total carbohydrates (CHO) and neutral detergent fiber (NDF) and the total digestible nutrients (TDN) intakes. Possible changes on the milk production and composition were also evaluated. Cows averaging initial live weight of 511.8 kg were randomized allotted to the treatments.The experimental period last 90 days for each cow, starting immediately after calving. The indigestible acid detergent fiber (IADF) was used as marker to determine the nutrients apparent digestibility. The results were interpreted by variance and regression analyses. The addition of i...

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Effects of feeding salt-tolerant forages cultivated in salt-alkaline land on intake, average liveweight gain, physiological responses and slaughtering performance in lamb

et al. 2011

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Wheat Straw and Urea in Pelleted Rations for Growing-Fattening Sheep

Cited by 3 publications

References 0 publications

The effects of grinding, either with or without NaOH treatment, on the utilization of straw by yearling dairy cattle

The effects of grinding, either with or without NaOH treatment, on the utilization of straw by yearling dairy cattle

Uréia para vacas em lactação: 1. Consumo, digestibilidade, produção e composição do leite

Effects of feeding salt-tolerant forages cultivated in salt-alkaline land on intake, average liveweight gain, physiological responses and slaughtering performance in lamb

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