A note on the rumen degradation characteristics of different varieties of rice straw

The rumen degradation characteristics and chemical composition of 8 varieties of rice straw were determined to assess the effects of variety, cultural condition or paddy field, growth type, growth stage and fertilizer level. The samples were incubated in polyester bags in the rumen of sheep for 8, 1...

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Bibliographic Details
Published inJournal of the Faculty of Agriculture - Iwate University (Japan) Vol. 19; no. 4
Main Authors Nakashima, Y. (Iwate Univ., Morioka (Japan). Faculty of Agriculture), Matuura, T, Yamada, K, Ambo, K
Format Journal Article
LanguageEnglish
Published 01.03.1990
Subjects
DEGRADACION
DEGRADATION
OVIN
OVINOS
PAILLE DE RIZ
PAJA DE ARROZ
RUMEN
VARIEDADES
VARIETE
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Summary:The rumen degradation characteristics and chemical composition of 8 varieties of rice straw were determined to assess the effects of variety, cultural condition or paddy field, growth type, growth stage and fertilizer level. The samples were incubated in polyester bags in the rumen of sheep for 8, 16, 24, 48, 72 and 96 h to estimate degradation rate and potential degradability using the expression p=a+b(1-e(-ct)) where p is degradability at time t and a, b and c are constants. There were large differences in maximum potential degradability (a+b) between varieties independent of cultural condition including the level of fertilizer. The degradation rate (c) however was unchanged. A short, early maturing (SE) variety had markedly high values for degradability. In some varieties degradability decreased greatly with stage of growth. Degradability correlated particularly well with ash, silica, ADF and ADL contents
Bibliography:9301507
L51
ISSN:0579-2746