Frações protéicas e de carboidratos e degradação do feno de coastcross, cama de frangos e casca de café
Nenhuma Miniatura Disponível
Data
2001
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Lavras
Resumo
O objetivo do presente estudo foi determinar o fracionamento dos compostos nitrogenados (frações A, B1, B2, B3 e C) e dos carboidratos (frações A, B1, B2 e C), segundo o Sistema Cornell Net Carbohydrate and Protein (CNCPS), e estimar os parâmetros cinéticos da degradação ruminal da matéria seca (SM), da Proteína Bruta (PB), da Fibra em Detergente Neutro (FDN) e da Fração Solúvel em Detergente Neutro (SDN) do Feno de Coastcross (FCC) com utilizando-se as técnicas in situ e de produção de gás. Os experimentos foram conduzidos no Laboratório de Pesquisa Animal e no Setor de Bovinocultura, do Departamento de Zootecnia da Universidade Federal de Lavras-UFLA, no período de Janeiro de 1999 a Junho de 2000. Na degradabilidade in situ, foram utilizadas 3 vacas da raça Nelore, providas de fistulas ruminais e avaliada a degradação de MS, PB e FDN. Foram incubados 3 sacos/alimentos/tempo/animal, nos tempos de 0, 4, 8, 12, 24, 36, 48 e 72 horas. Foram determinadas as frações solúvel (a) e insolúvel potencialmente degradável (c), Degradabilidade Potencial (DP) e Degradabilidade Efetiva (DE). O delineamento experimental foi em blocos ao acaso (DBC), com três repetições. A produção cumulativa de gás foi obtida nos tempos 1, 2, 3, 4, 5, 6, 12, 18, 24, 30, 36, 48, 60 72 horas. O delineamento experimental foi o mesmo utilizado na avaliação da degradabilidade in situ.A cinética da produção cumulativa de gás foi realizada para MS, FDN e SDN. De modo geral observaram-se variações tanto nas frações nitrogenadas quanto nas de carboidratos. Para o fracionamento dos compostos nitrogenados foram obtidos valores de 32, 10; 37, 45 e 22,51% para a fração B1 e 26,48; 15,78; e 40,86% para a fração B2, respectivamente para FCC, CF e CC. Os maiores valores para os componentes do feno de Coastcross, cama de frangos e casca de café foram encontrados nas frações B1 e B2 e C. A fração A que corresponde aos compostos nitrogenados não protéicos, presentes no FCC CF e CC apresentaram valores semelhantes (5,54; 6,74 e 4,99%, respectivamente). No fracionamento dos carboidratos, a fração C apresentou os valores de: 18,78; 34,02 e 40,90% para FCC, CF e CC, respectivamente. O feno de Coastcross, a cama de frangos e a casca de café apresentou os maiores valores para a fração B2, correspondente a fibra potencialmente degradável. Na técnica in situ a MS, apresentou efeito (P<0,01) degradabilidade efetiva (DE), cuja análise de regressão foi linear. Na proteína bruta, a fração (a) e DE apresentaram efeito (P<0,05) e (P<0,01) respectivamente, apresentando regressão linear. Para a FDN houve efeito (P<0,01) para a fração (a), cuja análise de regressão apresentou efeito como substrato a casca de café, pode ser adicionada ao feno de Coastcross até o nível de 32%, melhorando o valor nutritivo deste volumoso. Na técnica de produção de gás, o tempo de colonização (L) e a taxa de degradação (c) da MS foram linear e quadrático, respectivamente. A maximização da produção cumulativa de gás para a fração solúvel em detergente neutro ocorreu em torno de 24 horas, enquanto, para MS e FDN foram mais eficientes com a inclusão de CF ao de FCC até o nível de 18%. Os tempos de colonização (L) da MS e FDN diminuíram à medida que se procedeu a substituição. Todos os carboidratos presentes no feno com cama de frangos foram fermentados até 48 horas.
The objective of the present work was to determine the fractionting of the nitrogenous compounds (fractions A, B1, B2, B3, and C) and of carbohydrates (fractions A, B1, B2 and C), according to Cornell Net Carboydrate and Protein System (CNPS) and estimate the Kinetic parameters of ruminal degration of dry matter (DM), crude protein (CP), Neutral Detergente Fiber (NDF) and Neutral Detergent Soluble Fraction (NDS) of coast cross hay (CCH) with different levels of chicken litter (CL) whose substrate was of coffee husk (CH), by utilizing in situ and gas production techniques. The experiments were conducet in the Animal Research Laboratory and in the Cattle Production Sector of the Department of Animal Science of the Universidade Federal de Lavras (Federal University of Lavras) - UFLA in the period of January 1999 to June 2000. In in situ degradability, three cows of the Nelore bread fitted with ruminal fistulas were utilized and the degration of DM, CP and NDF were evaluated. Three bags/feed/time/animal in the times of 0, 4, 8, 12, 36, 48 and 72 hours were incubated. The soluble (a) and potentially degradable insolubçe fractions (b), degradation rate (c) potencial degradability (PD) and effective degradability (ED) were determined. The experimental desing was in randomized blocks (RBD) were three replicates. The accumulative gas production was obtained in the times 1, 2, 3, 4, 5, 6, 12, 18, 24, 30, 36, 48, 60 and 72 hours. The experimental desing was the same utilized in evaluating in situ degradability. The kinetcs of the accumulative gas production was accomplished for DM, NDF, and NDS. In general, variations both in the nitrogenous and carbohydrate fractions were noticed. For fractionating of the nitrogen compounds were obtained values of 32.10; 37.45 and 22.51% for fraction B1 and 26.48; 15.78 and 40.86% for fraction B2, respectively for CCH, CL and CH. The greatest values for the nitrogen compounds of coastcross hay, broiler litter and coffee husk were found in fractions B1, B2 and C. Broiler litter which corresponds to non-protein nitrogen compoundspresent in CCH, BL and Ch presented similar values (5.54; 6.74 and 4.99%, respectively) In fractionating of carbohydrates, fraction C presented values of: 18.78; 34.02 and 40.90% for CCH, CL and CH, respectively. The coastcross hay, chicken litter and coffee husk presented the highest values for fraction B2 corresponding to potencially degradable fiber. For the in situ techniques, DM presented effect (P<-0.01) for the soluble (a) and potentially degradable insoluble (b) fractions and effective degradability (ED) whose regression analysis was linear. In the case of crude protein, fraction (a) and ED presented effect (P< 0.05) and (P< 0.01), respectively, with a linear regression. For NDF, there was effect (P< 0.01) for fractiion (a), whose regression analysis presented a quadratic effect. The in situ evaluation enabled to conclude that broiler litter, having as a substrate coffee husk may be added to coastcross hay up to the level of 32%, improving the nutritive value of this roughage. In the gas production technique, the colonization time (L) and degradation rate (c) of DM presented quadratic effect (P< 0.001) while for NDF, the effects were linear and quadratic, respectively. The maximization of the accumulative gas production for the neutral detergent soluble fraction occurred around 24 hours, whereas for DM and NDF it was to be at 48 hours. The degradation rates of DM and NDF were more efficient with the additon up to 18% BL to CCH. The colonization times (L) for DM and NDF decreased with the addtion of BL tp the CCH. All the carbohydrates present in the CCH with broiler litter were fermented up to 48 hours.
The objective of the present work was to determine the fractionting of the nitrogenous compounds (fractions A, B1, B2, B3, and C) and of carbohydrates (fractions A, B1, B2 and C), according to Cornell Net Carboydrate and Protein System (CNPS) and estimate the Kinetic parameters of ruminal degration of dry matter (DM), crude protein (CP), Neutral Detergente Fiber (NDF) and Neutral Detergent Soluble Fraction (NDS) of coast cross hay (CCH) with different levels of chicken litter (CL) whose substrate was of coffee husk (CH), by utilizing in situ and gas production techniques. The experiments were conducet in the Animal Research Laboratory and in the Cattle Production Sector of the Department of Animal Science of the Universidade Federal de Lavras (Federal University of Lavras) - UFLA in the period of January 1999 to June 2000. In in situ degradability, three cows of the Nelore bread fitted with ruminal fistulas were utilized and the degration of DM, CP and NDF were evaluated. Three bags/feed/time/animal in the times of 0, 4, 8, 12, 36, 48 and 72 hours were incubated. The soluble (a) and potentially degradable insolubçe fractions (b), degradation rate (c) potencial degradability (PD) and effective degradability (ED) were determined. The experimental desing was in randomized blocks (RBD) were three replicates. The accumulative gas production was obtained in the times 1, 2, 3, 4, 5, 6, 12, 18, 24, 30, 36, 48, 60 and 72 hours. The experimental desing was the same utilized in evaluating in situ degradability. The kinetcs of the accumulative gas production was accomplished for DM, NDF, and NDS. In general, variations both in the nitrogenous and carbohydrate fractions were noticed. For fractionating of the nitrogen compounds were obtained values of 32.10; 37.45 and 22.51% for fraction B1 and 26.48; 15.78 and 40.86% for fraction B2, respectively for CCH, CL and CH. The greatest values for the nitrogen compounds of coastcross hay, broiler litter and coffee husk were found in fractions B1, B2 and C. Broiler litter which corresponds to non-protein nitrogen compoundspresent in CCH, BL and Ch presented similar values (5.54; 6.74 and 4.99%, respectively) In fractionating of carbohydrates, fraction C presented values of: 18.78; 34.02 and 40.90% for CCH, CL and CH, respectively. The coastcross hay, chicken litter and coffee husk presented the highest values for fraction B2 corresponding to potencially degradable fiber. For the in situ techniques, DM presented effect (P<-0.01) for the soluble (a) and potentially degradable insoluble (b) fractions and effective degradability (ED) whose regression analysis was linear. In the case of crude protein, fraction (a) and ED presented effect (P< 0.05) and (P< 0.01), respectively, with a linear regression. For NDF, there was effect (P< 0.01) for fractiion (a), whose regression analysis presented a quadratic effect. The in situ evaluation enabled to conclude that broiler litter, having as a substrate coffee husk may be added to coastcross hay up to the level of 32%, improving the nutritive value of this roughage. In the gas production technique, the colonization time (L) and degradation rate (c) of DM presented quadratic effect (P< 0.001) while for NDF, the effects were linear and quadratic, respectively. The maximization of the accumulative gas production for the neutral detergent soluble fraction occurred around 24 hours, whereas for DM and NDF it was to be at 48 hours. The degradation rates of DM and NDF were more efficient with the additon up to 18% BL to CCH. The colonization times (L) for DM and NDF decreased with the addtion of BL tp the CCH. All the carbohydrates present in the CCH with broiler litter were fermented up to 48 hours.
Descrição
Tese de Doutorado defendida na Universidade Federal de Lavras
Palavras-chave
Ruminante Nutrição Degradação Feno como ração Cama de frango Casca de café, Ruminant Nutrition Degradation Coastcross hay Chicken litter Coffee husk
Citação
Oliveira, José Paulo de. Frações protéicas e de carboidratos e degradação do feno de coastcross, cama de frangos e casca de café. Lavras : UFLA, 2001. 99p. (Tese - Doutorado em Zootecnia, área de concentração: Nutrição de Ruminantes). Orientador: Ivo Francisco de Andrade. T 636.85 o48f 2001