Effects of whole-plant corn silage treated with different methods on production performance,rumen fermentation parameters,and serum biochemical indexes of dairy cows
The effects of different treatments of whole-plant corn silage in dairy cows'diet on the production performance,milk quality,rumen fermentation parameters,and serum biochemical indexes were studied.Sixty Holstein cows with similar parity,lactation period and milk yield were divided into four treatment groups according to a single factor design,with five replicates in each group and three cows in each replicate.Dairy cows in the control group were fed a whole-plant corn silage without any additives,dairy cows in the test group 1 were fed a whole-plant corn silage treated with probiotic preparation,dairy cows in the test group 2 were fed a whole-plant corn silage treated with enzyme preparation,and dairy cows in the test group 3 were fed a whole-plant corn silage treated with bacteria-enzyme compound preparation.The pre-feeding period was one week,and the formal trial period was eight weeks.The results showed that compared with the control group,the average daily dry matter intake of cows in the test group 3 significantly increased(P＜0.05).The milk yield of dairy cows in the test group 1,group 2 and group 3 significantly increased(P＜0.05).The milk protein rate in the test group 3 significantly increased(P＜0.05),and the somatic cell number in the test group 1,group 2 and group 3 significantly decreased(P＜0.05).The rumen acetic acid,total volatile fatty acid,and bacterial protein levels in the test group 3 significantly increased(P＜0.05).The serum total protein level in the test group 3 significantly increased(P＜0.05),the serum glucose level in the test group 1,test group 2 and test group 3 significantly increased(P＜0.05),and the urea nitrogen level significantly decreased(P＜0.05).The result shows that the whole-plant corn silage treated with additives can improve the production performance,milk quality,rumen fermentation function and some serum biochemical indexes of dairy cows,and the whole-plant corn silage treated with bacteria-enzyme compound preparation had a better effect.
whole-plant corn silage with different treatmentsHolstein cowsproduction performancemilk qualityrumen fermentation parametersserum biochemical indexes
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