2Bargo F, Muller L D, Delahoy J E, et al. Performance of high producing dairy cows with three different feeding systems combining pasture and total mixed rations [J]. J Dairy Sei, 2002,85 : 2948-2963.
3Bargo F,Muller L D, Varga G A, et al. Ruminal digestion and fermentation of high producing dairy cows with three different feeding systems combining pasture and total mixed rations [J]. J Dairy Sei, 2002,85 : 2964-2973.
4Soriano F D, Polan C E , Millers C N. Supplementing pasture to lactating Holstein fed a total mixed ration diet[J]. J Dairy Sci, 2001,84 : 2460-2468.
5White S L,Bettrand J A ,wade M R, et al. Comparison of milk from Jersey and Holstein cows consuming pasture or a total mixed ration [J]. J Dairy Sci, 2001,84 : 2295-2301.