1Greenwood R H, Morrill J L. A new method of measuring diet abrasion and its effect on the development of the forestomach[J]. J Dairy Sci,1997,80:2534 - 2541.
2Velázquez O C,Lederer H M,Rombeau J L. Butyrae and the colonocyte.Implications for neoplasia[J]. Dig Dis Sci, 1996,41:727 - 739.
3邱怀.牛生产学[M].北京:中国农业出版社,2000..
4Coverdale J A,Tyler H D, Quigley J D,et al. Effect of various levels of forage and form of diet on rumen development and growth in calves[J].J Dairy Sci,2004,87:2554 -2562.
5Hopkins B A. Effects of the method of calf starter delivery and effects of weaning age on starter intake and growth of Holstein Calves fed milk once daily[J]. J Dairy Sci,1997,6:24 -28.
6Kertz A F, Prewitt L R, Everett Jr J P. An early weaning calf program: summarization and review[J]. J Dairy Sci, 1979, 62: 1835.
7Hopkins B A. Effects of the method of calf starter delivery, and effects of weaning age on starter intake and growth of Holstein calves fed milk once daily[J]. J Dairy Sci, 1997, 80: 2200-2203.
8Greenwood R H, Morrill J L, Titgmeyer E C. Using dry feed intake as a percentage of initial body weight as a weaning criterion[J]. J Dairy Sci, 1997, 80: 2542-2546.
9Anderson K L, Nagaraja T G, Morrill J L. Ruminal metabolic development in calves weaned conventionally or early[J]. J Dairy Sci, 1987, 70: 1000.
10Anderson K L, Nagaraja T G, Morrill J L, et ol. Ruminal metabolic development in conventionally or early-weaned calves[J]. J Dairy Sci, 1987, 64: 1215.