5Leedle J. A. Z, Bryant M. P, et al. Diurnal variations in bacterial numbers and fluid parameters in ruminal contents of animals fed low-or high-forage diets[J]. APPI. Environ. Mierobiol, 1982,44(2):402-412.
6Yang W. Z, Beauchemin K. A. Effects of physically effective NDF on rumen fermentation and nutrient digestion of dairy cows fed diets based on barley or corn silages[J]. Journal of Dairy Science, 2003, 86(Supphl)1:340.
7Armstrong D. G.. Developments in cereal processing-ruminants. In: Cereal Processing and Digestion. U. S. Feeds Grain Counell,London, 1972, 9.
8Leiva E, Hall M. B and Van Horn H. H. Performance of dairy cattle fed citrus pulp or corn products as sources of neutral detergent-soluble carbohydrates[J]. J. Dairy Sci, 2000, 83(12): 2866-2875.
9Zimbleman R. B,Collier R. J,Bilby T. R. Effect of feeding rumen-protected niacin on core body temperature and milk production in lactating Holstein dairy cows during summer heat stress. ADSA-ASAS Joint Annual Meeting,2008,142.
10Phipps R. H., Jones A. K., Beever, D. E. &Witt, M. W. Effect of incremental replacement of cereal grain with sugar beet feed on the laetational performance of high yielding cows offered maize silage dlets[J]. Proceedings of the British Society of Animal Seience 2003.128.
