2St-Pierre, N.R,B. Cobanov,G. Schnitkey. Economic losses from heat-stress by US livestock industries[J].{H}Journal of Dairy Science,2003,(E. Suppl):E52-E77.
6W.Z. Yang,K.A. Beauchemin.Increasing the Physically Effective Fiber Content of Dairy Cow Diets May Lower Efficiency of Feed Use 1[J].Journal of Dairy Science.2006(7)
7W.Z. Yang,K.A. Beauchemin.Effects of Physically Effective Fiber on Digestion and Milk Production by Dairy Cows Fed Diets Based on Corn Silage *[J].Journal of Dairy Science.2005(3)
8P.J. Kononoff,A.J. Heinrichs,H.A. Lehman.The Effect of Corn Silage Particle Size on Eating Behavior, Chewing Activities, and Rumen Fermentation in Lactating Dairy Cows[J].Journal of Dairy Science.2003(10)
9West J W, Mullinix B G, Bernard J K. Effects of Hot, Humid Weather on Milk Temperature, Dry Matter In- take,and Milk Yield of Lactating Dairy Cows[J]. Journal of Dairy Science, 2003(86):232-242.
10Reyes L A, Fuquay J W, Moore R B, et al. Relationship between accumulated heat stress during the dry period, body condition score, and reproduction parameters of Holstein cows in tropical conditions[J], Tropical Animal Health and Production, 2010(42) : 265-273.
