Eficiência microbiana, fluxo de compostos nitrogenados no abomaso, amônia e pH ruminais, em bovinos recebendo dietas contendo feno de capim-tifton 85 de diferentes idades de rebrota

Ribeiro, Karina Guimarães; García, Rasmo; Pereira, Odilon Gomes; Filho, Sebastião de Campos Valadares; Cecon, Paulo Roberto

doi:10.1590/s1516-35982001000200038

Cited by 22 publications

(21 citation statements)

References 13 publications

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“…Isso pode explicar a tendên-cia de menor ingestão de matéria seca dos animais que receberam dietas contendo apenas feno como volumoso, conforme já relatado. Silva et al (2002) trabalharam com capim-tifton 85 e obtiveram taxas de desaparecimento de 45,35% e 58,5% para MS e FDN, respectivamente, após 120 horas de incubação. Esses valores encontram-se abaixo dos obtidos neste trabalho e provavelmente que sejam conseqüência do maior teor de componentes indigestíveis por ocasião da idade avançada do capim utilizado (mais de 42 dias).…”

Section: Table 3 -Mean Apparent Digestibilities Of Dry Matter (Dm) Ounclassified

“…Estimou-se máxima concentração de amônia de 12 mg/100mL às 2,44 horas após a alimentação dos animais. Ribeiro et al (2001b) estimaram máxima concentração de amônia ruminal (9,7 mg/100mL) 1,38h após o fornecimento de ração contendo 60% de feno de capim-tifton 85 e 40% de concentrado. A atividade dos microrganismos celulolíticos é muito dependente da concentração de amônia no rúmen.…”

Section: Table 3 -Mean Apparent Digestibilities Of Dry Matter (Dm) Ounclassified

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Dietas contendo silagem de milho (Zea maiz L.) e feno de capim-tifton 85 (Cynodon spp.) em diferentes proporções para bovinos

et al. 2004

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RESUMO -Avaliaram-se o consumo, a digestibilidade, o pH e concentração de amônia ruminais e a taxa de passagem em bovinos alimentados com dietas contendo feno de capim-tifton 85 (TIF) e silagem de milho (SM) em diferentes proporções. Utilizaram-se quatro animais castrados, com peso médio de 523kg, fistulados no rúmen, distribuídos em um quadrado latino 4 x 4, recebendo 60% de volumoso e 40% de concentrado, na base da matéria seca. O volumoso consistiu das seguintes proporções (%): 100 TIF:0 SM; 67 TIF:33 SM; 33 TIF:67 SM e 0 TIF:100 SM. Os consumos de matéria seca (MS), de matéria orgânica (MO) e de matéria orgânica digestível (MOD), de proteína bruta (PB), de fibra em detergente neutro (FDN) e de carboidratos totais (CHOT) e digeríveis (CHOD) não foram influenciados pelas diferentes proporções de feno de capim-tifton 85: silagem de milho nas dietas, registrando-se valores médios de 9,2; 8,7; 6,4; 1,1; 3,7; 7,3 e 5,4 kg/dia, respectivamente. O consumo de extrato etéreo (EE) elevou linearmente com o aumento da silagem de milho nas dietas. As digestibilidades aparentes da MS, MO, PB, EE e CHO também não foram influenciadas pelas diferentes proporções de silagem de milho, obtendo-se, respectivamente, valores médios de 71,8; 73,0; 69,5; 69,2 e 73,9%. Para a digestibilidade da FDN, observou-se efeito quadrático, estimando-se valor máximo de 65,2% para dietas contendo 30,98% de silagem de milho. Estimou-se concentração máxima de amônia de 12,0 mg/100 ml e valor mínimo de pH de 5,98 às 2,44 e 6,82 horas após a alimentação, respectivamente. A taxa de passagem não foi influenciada pelas diferentes proporções de feno:silagem, no volumoso, apresentando valor médio de 4,2%/hora. Palavras-chave: consumo, degradabilidade in situ, digestibilidade, mantença, taxa de passagem Corn silage and Tifton 85 Bermudagrass Hay-Based Diets for SteersABSTRACT -The intake, digestibility, ruminal pH and ammonia concentrations and passage rate were evaluated in steers fed corn silage (CS) and Tifton 85 bermudagrass hay (T85H)-based diets, at different forage proportions. Four rumen fistulated steers with 523 kg of live weight were used in a 4x4 latin square design, and fed diets containing 60:40 forage:concentrate proportions in dry matter basis. The forage portion consisted of: 100 T85H:0 CS; 67 T85H:33 CS; 33 T85H:67 CS and 0 T85H:100 CS. The dry matter (DM), organic matter (OM), digestible organic matter (DOM), crude protein (CP), neutral detergent fiber (NDF), total carbohydrates (TC) and total digestible carbohydrates (TDC) intakes were not affected by different T85H: CS proportions and averaged 9. 2, 8.7, 6.4, 1.1, 3.7, 7.3 and 5.4 kg/day, respectively. The ethereal extract (EE) intake increased with increasing on corn silage proportion of the diets. The DM, OM, CP, EE and TC apparent digestibilities were not affected by increasing percentage of corn silage on rations and averaged 71.8, 73.0, 69.5, 69.2 and 73,9%, respectively. There was a quadratic effect for NDF digestibility, with maximum value of 65.2% for diets with 30.98% of CS. ...

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Section: Table 3 -Mean Apparent Digestibilities Of Dry Matter (Dm) Ounclassified

Dietas contendo silagem de milho (Zea maiz L.) e feno de capim-tifton 85 (Cynodon spp.) em diferentes proporções para bovinos

et al. 2004

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“…Thus, animals receiving 32 g of protected amino acids consumed 3.59% more than the recommended level, while those that did not receive the amino acids consumed 13.95% below the recommended level. The higher amount of protected amino acids in the diet may have provided better compliance with the metabolizable protein requirements of lambs, whereas the ingredients used in the concentrate (soybean meal and maize, silage and urea; Table 1) served as a source of rumen degradable protein RDP); this increased the amount of protein synthesized by ruminal microorganisms, since the synthesis of microbial protein is dependent on the concentration and quality of energy sources and the dietary nitrogen in the rumen (RIBEIRO et al, 2001). This balance between protein sources may have led to increased food consumption.…”

Section: Resultsmentioning

confidence: 99%

Effect of the inclusion of lysine and methionine on the nutritional performance and ingestive behavior of lambs

Araújo

Macedo

Oliveira

et al. 2019

SCA

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Lysine and methionine are the most limiting amino acids for ruminants; their inclusion in the free form is not effective, since they are quickly degraded by ruminal microorganisms, making the fulfillment of the requirements of metabolizable protein difficult. The objective of this study was to evaluate the effects of including different levels of lysine and methionine, protected from ruminal degradation, in the diet of lambs; more specifically, their effects on intake, digestibility, nitrogen balance and ingestive behavior. The experiment was conducted at the Experimental Farm Capim Branco, Federal University of Uberlândia, from September to October 2016. Five 1/2 Dorper x 1/2 Santa Inês lambs, at approximately eight months of age and an average weight of 50 kg, were distributed in a 5x5 Latin square design, with five treatments and five replicates. The treatments consisted of different levels (0 g, 8 g, 16 g, 24 g and 32 g) of lysine and methionine added to the diet, protected from ruminal degradation (MicroPEARLS LM ®). The feed was composed of corn silage and concentrate (30V: 70C), offered twice daily at 08h00 and 16h00. The experiment lasted 75 days and was divided into five phases. Each phase lasted 15 days, with 10 days for adaptation of the animals and five days of data collection. The animals were kept in individual metabolic cages, with a feeder, drinker and salt shaker. A digestibility assay was performed to determine the consumption and apparent digestibility coefficients of dry matter (DM), crude protein (CP), neutral detergent fiber and acid (NDF/NDA). Urine volume and density, stool weight and fecal score, nitrogen balance and ingestive behavior were recorded. In relation to metabolic and body weight, DM intake (kg day -1 ) presented a positive linear response with the inclusion of amino acids, as well as the CP intake, NDF intake, ingested nitrogen and nitrogen balance, which were positive in all treatments. There was no difference (P < 0.05) in the digestibility coefficients of DM, CP and NDF. Water consumption was high in all treatments, but did not differ by treatment (P > 0.05). Ingestive behavior was not influenced (P > 0.05). The inclusion of up to 32 g of protected lysine and methionine increases DM and nutrient intake, without negatively affecting digestibility. The high CP intake induced an increase in the urinary nitrogen excretion, and consequently, an increase in the energy expenditure. ResumoLisina e metionina são os aminoácidos mais limitantes para ruminantes. Sua inclusão na forma livre não é eficaz, visto que os microrganismos ruminais os degradam rapidamente, dificultando o atendimento das exigências de proteína metabolizável. Objetivou-se avaliar a inclusão de diferentes teores de lisina e metionina protegidos da degradação ruminal na ração de borregas, sobre o consumo, digestibilidade, balanço de nitrogênio e comportamento ingestivo. O experimento foi realizado na Fazenda Experimental Capim Branco, da Universidade Federal de Uberlândia, no período de setembro à outubro de 2016. ...

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“…This reduction of 11% in DMI BW -1 might be due to the committee's recommendations being based on animals genetically different from those used in the present study. The highest level of protected amino acids in the diet might have provided better compliance with the metabolisable protein requirements of lambs, and the ingredients used in the concentrate (soybean meal, maize, silage and urea, Table 1) served as a source of rumen degradable protein (PDR), therefore maximising the synthesis of microbial protein, since the synthesis of microbial protein is dependent on the concentration and quality of energy sources and dietary nitrogen in the rumen (RIBEIRO et al, 2001). This balance between the sources of protein might have caused an increase in the consumption of dry matter.…”

Section: Resultsmentioning

confidence: 99%

Levels of protected lysine and methionine in the diet of lambs: nutritional parameters and protein metabolites

Araújo

Macedo

Oliveira

et al. 2019

SCA

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The objective of this study was to evaluate the effect of inclusion of different levels of protected lysine and methionine on the nutritional parameters and protein metabolites of lambs. The experiment was carried out at the Capim Branco Experimental Farm, at Uberlândia Federal University, during the months of September and October 2016. Five blood lambs ½ Dorper × ½ Santa Inês, approximately eight months old and with an average weight of 50 kg, were distributed in a Latin square scheme 5 × 5 (five treatments and five replicates). The treatments consisted of the inclusion in the diet of different levels of lysine and methionine protected from ruminal degradation (MicroPEARLS LM ® ): 0 g, 8 g, 16 g, 24 g, and 32 g. The diet was composed of corn silage and concentrate in a ratio of 30V:70C. The experiment was divided into five phases. Each phase had a duration of fifteen days (ten days of adaptation of the animals to the experimental diets and five days of data collection). The animals were kept in individual metabolic cages. A digestibility assay was performed to determine the apparent dry matter intake and digestibility (DMI/DDMI), nitrogen balance, and protein metabolites. The DMI (kg day -1 ) and in relation to the metabolic weight presented a positive linear equation, and was highest for the treatment with 32 g of amino acids, as well as the ingested nitrogen and nitrogen balance, being positive in all treatments. There was no difference (P > 0.05) in the DDMI. The crude protein and urea concentrations remained above the recommended levels and the concentration of creatinine remained below the recommended level. The inclusion of protected amino acids up to 32 g increases DMI and urinary nitrogen excretion without negatively affecting digestibility. The protein metabolism was altered, without causing damage to the performance of the animals.

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Eficiência microbiana, fluxo de compostos nitrogenados no abomaso, amônia e pH ruminais, em bovinos recebendo dietas contendo feno de capim-tifton 85 de diferentes idades de rebrota

Cited by 22 publications

References 13 publications

Dietas contendo silagem de milho (Zea maiz L.) e feno de capim-tifton 85 (Cynodon spp.) em diferentes proporções para bovinos

Dietas contendo silagem de milho (Zea maiz L.) e feno de capim-tifton 85 (Cynodon spp.) em diferentes proporções para bovinos

Effect of the inclusion of lysine and methionine on the nutritional performance and ingestive behavior of lambs

Levels of protected lysine and methionine in the diet of lambs: nutritional parameters and protein metabolites

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