The influence of elephant-grass (Pennisetum purpureum Schum., Mineiro variety) growth on the nutrient kinetics in the rumen

Vieira, Ricardo Augusto Mendonça; Pereira, José Carlos; Malafaia, Pedro; Queiróz, Augusto César de

doi:10.1016/s0377-8401(96)01130-3

Cited by 50 publications

(60 citation statements)

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“…(6) Eq. (7) which A p and I p are the standardized estimates and , respectively (Waldo et al, 1972;Vieira et al, 1997).…”

Section: Methodsmentioning

confidence: 99%

“…The effective ruminal degradability (RD) of dFC and of dNDIP were estimated by the reciprocal function of Eq. (1) as described by Vieira et al (1997) and defined by the following expressions:…”

Section: Methodsmentioning

confidence: 99%

“…The total and partial rumen-fill (RF) effects of the potentially degradable (RF(D)) and indigestible (RF(I)) fiber fractions were calculated based on the standardized estimates of parameters A p and I p . According to Vieira et al (1997), the RF can be described by Eq. (11):…”

Section: Methodsmentioning

confidence: 99%

“…In this sense, the specific growth rate of the microorganisms on dFC was estimated according to the expressions described by Van Milgen et al (1991), R. Bras. Zootec., 45(9):563-571, 2016 Vieira et al (1997), andVieira et al (2000b). Thus, by employing the definition of Schofield et al (1994), we have:…”

Section: Methodsmentioning

confidence: 99%

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Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein

et al. 2016

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-This experiment was conducted to evaluate the degradation kinetics and microbial efficiency of beef cattle grazing on low-quality forage and receiving supplements with different levels of rumen undegradable protein (RUP). The animals grazed on palisade grass pasture solely or this pasture and supplement containing 40 or 60 g of RUP per 100 g of crude protein (CP). The degradation profiles of neutral detergent fiber, fiber carbohydrates, and neutral detergent insoluble protein were interpreted kinetically by using a decreasing logistic model. Treatments (no supplement, or RUP at 40 or 60 g −1 100 g CP) did not affect rumen fill; however, the increase in the indigestible fiber carbohydrate fraction that occurred at the expense of the digestible fiber carbohydrate fraction resulted in a greater rumen fill effect. The palisade grass showed a significant proportion of its nitrogen in the form of slowly degradable protein as neutral detergent insoluble protein, which amounted to 26 g per 100 g CP. Supplementation with 40 g of RUP per 100 g CP decresead the indigestible fraction of the low-quality forage. However, the absence of a rumen-fill effect demonstrates that the additional supply of nutrients contributes greatly to increasing growth efficiency and use of the available energy from the forage by the ruminal microorganisms.

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“…(6) Eq. (7) which A p and I p are the standardized estimates and , respectively (Waldo et al, 1972;Vieira et al, 1997).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein

et al. 2016

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“…Como esta fração deixa o rúmen somente por meio do processo de passagem, espera-se grande contribuição para o efeito de repleção ruminal (Vieira et al, 1997). Ribeiro et al (2001) observaram consumos de MS para dietas à base de feno de capim-tifton 85 com 28 a 56 dias de rebrota próximos aos observados neste estudo, que variaram de 5,39 a 5,85 kg/dia.…”

Section: Means Followed By Different Superscripts In the Same Row Difunclassified

Consumo e digestibilidade dos nutrientes em bovinos alimentados com dietas à base de volumosos tropicais

Cabral

Filho²,

Detmann³

et al. 2006

R. Bras. Zootec.

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RESUMO -Objetivou-se determinar os consumos de MS, PB, EE, CT, FDN e CNF e as digestibilidades aparentes totais e parciais desses nutrientes em bovinos alimentados com dietas à base de silagens de milho e de capim-elefante e feno de capimTifton 85. Os volumosos compuseram 90% da MS das dietas, as quais foram suplementadas com 10% de farelo de soja. Foram utilizados seis bovinos fistulados no rúmen e abomaso (peso inicial de 351 kg) em um delineamento em quadrado latino 3 x 3 duplo, simultâneos. Cada período experimental constou de 16 dias, sendo os 10 primeiros destinados à adaptação dos animais e os seis dias restantes para coleta de amostras de fezes e digesta abomasal. Utilizou-se a fibra em detergente neutro indigestível (FDNi) como indicador do fluxo de MS abomasal e fecal. Embora as dietas à base de silagem de milho e de feno de capim-Tifton 85 não tenham diferido quanto à ingestão de MS, a dieta à base de silagem de milho permitiu maior ingestão de NDT. A dieta de feno de capim-Tifton 85 promoveu promoveu maior consumo de FDN (4,52 kg/dia), enquanto aquela com silagem de milho resultou em maior ingestão de CNF (1,95 kg/dia). A dieta com silagem de milho proporcionou maior digestibilidade aparente total de MS (66,3%), MO (68,9%), FDN (55,7%) e CT (68,2%). O rúmen foi o principal local de digestão dos carboidratos totais e da FDN para todas as dietas. Considerando a relação inversa entre a digestibilidade total da matéria seca e a ingestão de FDNi, pode-se inferir que essa última fração pode ser utilizada na estimativa da digestibilidade de gramíneas tropicais. A estimativa da digestão verdadeira dos CNF foi de 96,6% para as dietas avaliadas.Palavras-chave: capim-elefante, feno de tifton 85, ruminantes, silagem de milho, valor nutritivo Intake and digestibility in cattle fed tropical forage based diets ABSTRACT -The objective of this trial was to investigate the effects of diets containing corn silage, bermudagrass hay, or elephantgrass silage on intake and apparent total tract and partial digestibilities of nutrients in cattle. A forage to concentrate (soybean meal) ratio of 90:10 was used. Six ruminally and omasally fistulated bovines averaging 351 kg of initial body weight were used in two replicated 3 x 3 Latin squares. Each experimental period lasted 16 days with 10 days for animal adaptation and six days for samples collection. The internal marker indigestible neutral detergent fiber (INDF) was used to estimate abomasal DM flow and fecal DM excretion. No significant difference in DM intake was observed between corn silage and bermudagrass hay diets. However, total digestible nutrient intake was greater on corn silage than bermudagrass hay. Animals fed the bermudagrass hay diet had the greatest NDF intake (4.52 kg/day) while those fed corn silage showed the highest NFC intake (1.95 kg/day). In addition, the corn silage diet also resulted in the greatest apparent total tract digestibilities of DM (66.3%), OM (68.9%), NDF (55.7%), and total carbohydrates (68.2%). Rumen was the main site for digestion of ...

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Effect of cutting height of Napier grass on rumen degradation and in vitro dry matter digestibility

Zewdu

Baars

2003

Tropical Science

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The influence of elephant-grass (Pennisetum purpureum Schum., Mineiro variety) growth on the nutrient kinetics in the rumen

Cited by 50 publications

References 14 publications

Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein

Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein

Consumo e digestibilidade dos nutrientes em bovinos alimentados com dietas à base de volumosos tropicais

Effect of cutting height of Napier grass on rumen degradation and in vitro dry matter digestibility

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