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Asian-Australas J Anim Sci > Volume 14(1); 2001 > Article
Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 2001;14(1): 41-47.
DOI: https://doi.org/10.5713/ajas.2001.41    Published online January 1, 2001.
In Sacco Ruminal Degradation Characteristics of Chemical Components in Fresh Zoysia japonica and Miscanthus sinensis Growing in Japanese Native Pasture
S. Ogura, T. Kosako, Y. Hayashi, H. Dohi
Abstract
Ruminal degradation characteristics of dry matter (DM), neutral detergent fiber (NDF) and crude protein (CP) in fresh leaves of two Japanese native grasses (Zoysia japonica and Miscanthus sinensis) and one sown temperate grass (Dactylis glomerata) were investigated by an in sacco method in spring (mid-May), summer (mid-July) and autumn (mid-September). Japanese native grasses had higher NDF and lower CP concentrations than D. glomerata, and the CP concentration in native grasses decreased in autumn. Ruminal degradability of DM, NDF and CP was lower in native grasses than in D. glomerata (p<0.05) in all seasons. DM and NDF degradability decreased in summer for Z. japonica and D. glomerata, while it decreased in autumn for M. sinensis. CP degradability in Z. japonica was constant throughout the seasons, whereas that in M. sinensis greatly decreased in summer and autumn (p<0.05). It was concluded that Z. japonica could stably supply ruminally digestible nutrients for grazing animals in Japanese native pasture. However, the degradation characteristics of freshly chopped native grasses did not fit the exponential model of D=a+b(1-e-ct) proposed by 횠rskov and McDonald.
Keywords: Dactylis glomerata; Fresh Material; In Sacco Degradation; Japanese Native Pasture; Miscanthus sinensis; Zoysia japonica
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