Utilisation Du Phosphate Monoammonique Chez Le Mouton Ii. — Influence Sur Le Métabolisme Azoté De La Microflore Du Rumen

Durand, Michelle; Foret, R.; Dumay, Christiane; Guéguen, L.; Beaumatin, Ph.; Deschault, F. Le; Montredon,

doi:10.1051/animres:19760112

Cited by 5 publications

(8 citation statements)

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“…With cereal diets or when the animal consumes a large amount offermentable carbohydrates in a short time, the salivary ftow is not sufficient to prevent a rapid drop of pH leading to acute or chronic subacute acidosis (pH < 5.5) 5 6. Even when the pH drop is not so severe as to cause acidosis it may affect the efficiency of fermentation. The optimum pH ranges for cellulolysis are about 6.7-7.0 62 and for protein synthesis above 5.7 16 . Therefore, in a mixed concentrate roughage diet there are many reasons for not letting the pH fall below 6.0 35 .…”

Section: Buffering Capacitymentioning

confidence: 96%

Influence of minerals in rumen microbial digestion

Durand¹,

Kawashima²

1980

Digestive Physiology and Metabolism in Ruminants

110

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Section: Buffering Capacitymentioning

confidence: 96%

Influence of minerals in rumen microbial digestion

Durand¹,

Kawashima²

1980

Digestive Physiology and Metabolism in Ruminants

110

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“…Determining the true availability of dietary phosphorus for rumen microbes should involve the use of radioisotopes [36] or in vitro devices [3] whereas the RPR measured in our study is not an exact "phosphorus availability" measurement because unavailable phytic phosphorus can be released from the nylon bag. However, this approach reveals specific aspects of phosphorus digestion and could represent an interesting method for large scale feedstuff screening.…”

Section: Technological Treatments Influence On Phosphorus Availabilitymentioning

confidence: 99%

“…Therefore, rumen phosphorus availability could play an important role in dietary phosphorus quality. Previous authors have studied either phosphorus availability or phosphorus use by rumen microbes using radio labelled phosphorus [36], in vitro devices and in vivo trials [3,37]. The aim of the present work was to measure the rumen phosphorus release from feedstuffs commonly used in ruminant diets by the nylon bag technique [17,19] as previously done on forages [5,6,26].…”

Section: Introductionmentioning

confidence: 99%

Ruminal phosphorus availability from several feedstuffs measured by the nylon bag technique

Bravo

Meschy

Bogaert³

et al. 2000

Reprod. Nutr. Dev.

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-The present study was aimed at determining rumen phosphorus availability of some feedstuffs assessed with the nylon bag technique: forage (alfalfa), cereals (control-C wheat, formaldehyde treated-FT wheat, barley, corn), cereal by-products (wheat bran, wheat distillers, corn distillers) and meals (C and FT soya bean meals, rapeseed meals and sunflower meals). Rumen phosphorus availability was not uniform amongst the feedstuffs, varying from 33.1% (FT rapeseed meal) to 84.7% (C wheat). Alfalfa phosphorus release kinetics showed high bacterial phosphorus contamination. Technological treatments affected phosphorus content of by-products by either increasing (wheat bran and distillers) or decreasing (corn distillers) after germ extraction from the seed. Formaldehyde treatment decreasing rumen phosphorus availability (from 77.2% vs. 89.4% for wheat to 33.1% vs. 64.4% for the rapeseed meal) may depreciate the phosphorus nutritional value of FT meals. availability / feedstuff / phosphorus / rumenRésumé -Disponibilité ruminale du phosphore de certaines matières premières mesurée à l'aide de la méthode des sachets nylon. Cet article décrit la détermination, par la méthode des sachets nylon, de la disponibilité ruminale du phosphore d'un fourrage (luzerne déshydratée), de céréales (blé, blé tanné, orge, maïs), de sous-produits de céréales (son et drêches de blé, drêches de maïs) et de tourteaux (soja et soja tanné, colza et colza tanné, tournesol et tournesol tanné). La disponibilité ruminale du phosphore est très variable : de 33,1 % (tourteau de colza tanné) à 84,7 % (blé). La cinétique de libération du phosphore de la luzerne indique une importante contamination par le phosphore bactérien. Les traitements technologiques influencent la teneur en phosphore. L'extraction du germe enrichit (son et drêches de blé) ou appauvrit (drêche de maïs) en phosphore les sous-produits par rapport à la céréale. Le tannage au formol, diminuant la disponibilité ruminale du phosphore (de 77,2 % vs. 89,4 %, blé à 33,1 % vs. 64,4 %, tourteau de colza), semble pénaliser la valeur nutritionnelle du phosphore des tourteaux tannés. disponibilité / matière première / phosphore / rumen

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“…Da mesma forma, Durand et al (1976) ao compararem MAP e ureia como fonte de nitrogênio para a síntese de proteína microbiana e a influência desses ingredientes na atividade da flora ruminal verificaram menor aceitabilidade em cordeiros alimentados com rações contendo 4% de MAP. Os autores atribuíram esse efeito aos menores valores de pH ruminal, maior concentração de nitrogênio amoniacal e reduzida formação de ácidos graxos de cadeia curta para essa ração experimental, justificando a redução linear do consumo de MS e consequentemente do GDM conforme adição de MAP deste estudo (Tabela 2).…”

Section: Resultsunclassified

Utilização de monoamônio fosfato em rações com elevado teor de polpa cítrica para cordeiros em confinamento

et al. 2011

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RESUMO -Objetivou-se com esta pesquisa avaliar os efeitos da inclusão de monoamônio fosfato (MAP) em rações com alta proporção de concentrado contendo polpa cítrica sobre o desempenho e as características de carcaça de cordeiros em confinamento. Vinte e quatro cordeiros Santa Inês (26,4 kg de peso corporal e 125 dias de idade, em média) foram distribuídos em delineamento experimental de blocos completos casualizados, definidos de acordo com o peso e a idade no início do experimento. As rações foram isonitrogenadas, continham 70% de polpa cítrica na MS e tiveram a adição de 0; 0,3; 0,6 e 0,9% de MAP, correspondendo aos tratamentos CON, 0,3MAP, 0,6MAP e 0,9MAP, respectivamente. Houve diminuição linear no consumo de matéria seca e ganho diário médio de peso com a inclusão de MAP na ração, sem alteração nos parâmetros de carcaça avaliados. A utilização de MAP como fonte de fósforo em rações contendo polpa cítrica afeta negativamente o desempenho de cordeiros em confinamento.Palavras-chave: carcaça, desempenho, ovinos, Santa Inês, subproduto Monoammonium phosphate in diets with high level of citrus pulp fed to feedlot lambsABSTRACT -The objective of this experiment was to evaluate the effects of adding monoammonium phosphate (MAP) in high concentrate diets containing citrus pulp on feedlot lamb performance and carcass characteristics. Twenty four SantaInes lambs (26.4 kg of initial body weight and 125 d old) were penned individually and used in a randomized complete block design according to body weight and age at beginning of the trial. Diets were formulated to provide a similar amount of crude protein and contained 70% of citrus pulp on a DM basis. MAP was added at 0, 0.3, 0.6, and 0.9% of the diet DM corresponding to the experimental treatments CON, 0.3MAP, 0.6MAP, and 0.9MAP, respectively. There was a linear decrease in dry matter intake and average daily gain, although no changes on carcass measures were observed. The use of MAP in citrus pulp diets affects lamb growth negatively.

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Utilisation Du Phosphate Monoammonique Chez Le Mouton Ii. — Influence Sur Le Métabolisme Azoté De La Microflore Du Rumen

Cited by 5 publications

References 0 publications

Influence of minerals in rumen microbial digestion

Influence of minerals in rumen microbial digestion

Ruminal phosphorus availability from several feedstuffs measured by the nylon bag technique

Utilização de monoamônio fosfato em rações com elevado teor de polpa cítrica para cordeiros em confinamento

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