Data/hora: 11/06/2024 14:48:00

Provedor de dados: | 64
País: | Brazil
Título: | Degradability study of neutral detergent fiber of coast cross (Cynodon dactylon x Cynodon nlemfunensis)
Autores: | Savian,Taciana Villela; Muniz,Joel Augusto; Aquino,Luiz Henrique de; Banys,Vera Lúcia; Ferreira,Daniel Furtado.
Data: | 2007-08-01
Ano: | 2007
Palavras-chave: | Coast cross; Degradability model; Fitting quality; Non-linear regression.
Resumo: | The objective of this work was to fit the degradation model proposed by Orskov &amp;amp; McDonald (1979) to data of an in situ degradability trial. Neutral detergent fiber degradations (NDF) of coast cross grass (Cynodon dactylon x Cynodon nlemfunensis) were submitted to twelve cutting ages (30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330 and 360 days) in a complete block design. At each cutting age, NDF degradation was investigated using nine incubation times (0, 3, 6, 12, 24, 48, 72, 96 and 120 hours) in a split-plot design, taking cutting age as main plots and incubation time as subplots. Each plot comprised a non-lactating cow with a permanent ruminal fistula. Variances of the parameter estimates were also obtained, as well as expressions for the estimation of confidence intervals for parameters in the model. A good fit of the model to the data of neutral detergent fiber degradability in the most cutting ages was found. The cutting ages of the coast cross grass influenced the degradability of different fractions, benefiting early stages. In advanced cutting ages the parameters estimates were less precise.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542007000400035
Editor: | Editora da Universidade Federal de Lavras
Relação: | 10.1590/S1413-70542007000400035
Formato: | text/html
Fonte: | Ciência e Agrotecnologia  v.31 n.4 2007
Fonte: | info:eu-repo/semantics/openAccess