3Luginbuhh J M. Whole-Tract Digesta Kinetics and Comparison of Techniques for the Estimation of Fecal Output in Steers Fed Coastal Bermudagrass Hay at Four Levels of Intake [J].Anim. Sci.,1994,72:201-211
4S. Van Weyenberg. Passage rate of digesta through the equine gastrointestinal tract: A review [J]. Livestock Science., 2006,99(1):3-12
7Mayes R W, Dove H, The use of plant wax alkanes as marker substances in studies of the nutrition of herbivores:a review [J].Agric.Res.,1998,42:913-952
8P. Huhtanen. Comparison of methods, markers, sampling sites and models for estimating digesta passage kinetics in cattle fed at two levels of intake [J]. Animal Feed Science and Technology.,1995,52(1-2):141-158
9F. J. Giraldez. The use of even-chain alkanes sprayed onto herbage as rate of passage markers in goats [J]. Livestock Science, 2006,100(2-3):195-202
10M. Rinne. Digestive processes of dairy cows fed silages harvested at four stages of grass maturity[J]. Anita. Sci.,2002,80:1 986-1 998
7Uden P, Colucci P E, Van Soest P J. Investigation of chro-mium, cerium and cobalt as markers in digesta. Rate of passage studies[J]. J Sci Food and Agric,1980,30:625-632.
10GARCIA-RODRIGUEZ A,MANDALUNIZ N,FLORES G,et al.A gas production technique as a tool to predict organic matter digestibility of grassland maize silage[J].Animal Feed Science and Technology,2005,123:267-276.