Abstract: As a national advantageous milk source region,Yantai is characterized by a temperate monsoon climate,which contributes to the high incidence of three major diseases in dairy cows,foot rot,mastitis and endometritis seriously restricting the development of local dairy farming.Based on empirical data from 620 lactating cows at Yantai Gerun Fude Ranch from 2019 to 2024,this paper proposed a tripartite prevention and control system of "environmental regulation-intelligent early warning-precision intervention".Practice has shown that the application of digital intelligence management technologies enables the detection time of foot rot to be advanced by 72 hours;the use of IgY antibody therapy can increase the clinical cure rate of mastitis to 76.5%;and probiotic intervention during the perinatal period can reduce the incidence of endometritis by 34%.This model provides a technical template for healthy dairy farming in the Jiaodong Peninsula.

Key words: Yantai dairy farming, prevention and control of three major diseases, digital intelligence management, breeding technology