From: Effects of season and age at first calving on genetic and phenotypic characteristics of lactation curve parameters in Holstein cows
Parameters
Mean
SD
a
16.62
6.60
b
0.27
0.03
c
0.003
0.001
Peak time (day)
76.60
24.86
Peak yield (kg)
33.10
5.19
Part1
2985.09
496.87
Part2
3051.69
579.44
Part3
2681.95
647.14
Milk305
8718.73
1623.05
Persis1
102.27
9.68
Persis2
89.82
15.89