Thermal Stress Additive Impact On The Performance Of Dairy Cattle In Different Environments

According to the important problems of the cattle industry in high temperature stress, We investigated the effect in different resist stress additive and environment, in order to explore the best combination of enhance cow production trait.There were 8 groups and each groups had 8 cows in the experiment.groups A was the positive group, be feeded basic dietary and in the normal environment(no spray and no wind); groups B was basic dietary and in the improved environment (spray and wind) ; Group C was feeded with basic dietary and NaHCO₃(120g/d/head) and Mg0(50g/d/head) and KCl(180g/d/head), in the environment with no spray and no wind; Group I) is feeded with basic dietary and NaHCO₃ (120g/d/head) and MgO(50g/d/head) and KC1 (180g/d/head) and in the another environment with spray and wind; Group E was feeded,with basic dietary and traditional druggery additive in the environment with no spray and no wind; Group F was feeded with basic dietary and traditional druggery additive in the environment with spray and wind;Group G was feeded with basic dietary and NaHCO₃ (120g/d/head) and MgO(50g/d/head) and KCl (180g/d/head) and traditional druggery additive in the environment with no spray and wind; Group H was feeded with basic dietary and NaHCO₃( 120g/d/head ) and Mg0(50g/d/head) and KCl(180g/d/head) and traditional druggery additive in the environment with spray and wind.The results indicated that the effect of group II is the best, it is significantly different to other 7 groups (P<0.01) , the second is group F, it is significantly different to other 6 groups (P<0.01) ,group A is the worst.