Rate of NDF degradation

摘要：

Degradation profiles for NDF were estimated for 83 samples of grass/grass-clover, 27 samples of cereal whole crop and 14 samples of maize whole crop. To examine variation in rate of degradation, degradation profiles were analysed for rate of degradation in individual incubation intervals. For grass/grass-clover and maize whole crop, rate of degradation first increased and then decreased with increasing incubation time, especially for grass/grass-clover, indicating both a lag time before maximum degradation is reached, and multiple NDF pools with different rates of degradation. In contrast, whole crop cereals had a very high degradation rate in the first incubation interval, and thereafter degradation rate decreased, indicating that a small fraction of the NDF in whole crop cereals is very easily degradable. The non constant rate of NDF degradation means that estimated degradation parameters will be very dependent on the degradation times used for parameterization, and therefore standardization of the method used for estimation of degradation characteristics is essential.

关键词： nylon bag in situ whole crop cereal maize whole crop grass-clover fractional degradation rate

作者: M.R.Weisbjerg V.Koukolová P.Lund

作者单位: Faculty of Agricultural Sciences, University of Aarhus, Research Centre Foulum P.O.Box 50, DK-8830 T Institute of Animal Science P(r)átelství 815, 104 00 Praha-Uh(r)ínéves, Czech Republic

会议类型: 国际会议

会议名称: The 7tb International Symposium on the Nutrition of Herbivores(ISNH-7)(第七届国际草食动物营养研讨会)

会议地点: 北京

会议语种:英文

页码: 651-655

在线出版日期: 2007-09-16（万方平台首次上网日期，不代表论文的发表时间）