酶菌复合制剂对奶牛生产性能和体细胞数的影响

doi:10.16431/j.cnki.1671-7236.2019.06.011

Abstract

Abstract:

This experiment was conducted to investigate the effects of compound preparations of protease and probiotics on production performance and somatic cell count of dairy cows.240 dairy cows with similar age,parity,lactation day and physiological trait were randomly assigned to 4 groups with each group 6 replicates,10 dairy cows per replicate.Control group was fed basal diet,groups Ⅰ,Ⅱ and Ⅲ were added 0.5,1.0 and 1.5 kg/t of compound preparations of protease and probiotics in the basal diet,respectively.The pre-test period was 10 d,and the test period was 40 d.Cow feces were collected at 10th,20th,30th,and 40th day,and the composition of cow feces was analyzed by fecal analysis sieve.Milk samples were collected on the 1st,20th and 40th day of the experiment.The milk fat rate,milk protein rate,non-fat solids and somatic cells (SCC) in milk were measured by milk analyzer.The average daily milk yield (ADMY) and average daily feed intake (ADFI) of each cow was recorded during the test.The results indicated that compound preparation of protease and probiotics groups could significantly increase the cow milk yield (P<0.05) and the protein and fat content in milk (P<0.05),decrease somatic cell counts (P<0.05),improve feces structure.In conclusion,the optimum adding amount of compound preparations of protease and probiotics was 1.0 kg/t,it could improve the milk quality and reduce the number of somatic cells in dairy cows.

Key words: compound preparations of protease and probiotics; dairy cows; production performance; somatic cell count

CLC Number:

S816.7

SHAN Chunqiao, LIN Yang, FENG Liuliu, LIU Yan, WU Jie, LU Jishuang, LI Guoai, JIANG Guotuo. Effects of Compound Preparations of Protease and Probiotics on Production Performance and Somatic Cell Count of Dairy Cows[J]. , 2019, 46(6): 1652-1659.

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Effects of Compound Preparations of Protease and Probiotics on Production Performance and Somatic Cell Count of Dairy Cows

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