5Kolver E S,Muller L D.Performance and Nutrient Intake of HighProducing Holstein Cows Consuming Pasture or a Total Mixed Ra-tion[J].Journal of dairy science,1998,81(5):1403-1411.
4F. Bargo,L. D.Muller, J. E. Delahoy,T.W.Cassidy.Performance of High Producing Dairy Cows with Three Different Feeding Systems Combing Pasture and Total Mixed Rations[J].J. Dairy Sci., 2002,85:29482 963.
5P. R. Tozer, F.Bargo,L. D. Muller.Economic Analyses of Feeding Systems Combining Pasture and Total Mixed Rations [J].J.Dairy Sci,2003,86:808-818.
6bargo F,muller L D,delahoy J E, el al . Performance of high producing dairy cows with three different feeding systems combining pasture and total mixed ration[J].J Dairy Sci,2002.85:2948-2963.
7Lolver E S, Muller L D . Performance Naturient intake of high producing Holstein cows consuming pasture or atotal mixed ration[J]. J Dairy Sci, 1998,81 : 1403-1411.
