Fig. 3.

Proportion of percent of clinical mastitis cases of different stage of lactation period in different parities of Holstein dairy cows in spring (a) and summer (f); Lowess curves of clinical mastitis cases which show the general trend of clinical mastitis incidence during a lactation period in different parity in spring (b) and summer (g); Occurrence time (day) of clinical mastitis in different parity of each lactation period in spring (c, d, and e) and summer (h, i, and j). Different symbols show significant different between bars (p < 0.05).