Effect of dietary phosphorus content on milk production and phosphorus excretion in dairy cows

Table 4 Fecal and urinary P concentrations at different stages of lactation in cows fed diets differing in P content

Item	Dietary treatment¹			SEM	P ²
Item	LP	MP	HP	SEM	T	L	Q
Fecal P,% of DM
Peak lactation	0.69	0.98	1.13	0.031	0.01	0.02	0.45
Middle lactation	0.52	0.70	1.00	0.102	0.03	0.04	0.39
Late lactation	0.74	1.03	1.15	0.085	0.02	0.02	0.26
Urine P, mmol/L
Peak	0.23	0.32	0.39	0.011	0.01	0.01	0.44
Middle	0.34	0.42	0.44	0.018	0.01	0.03	0.29
Late	0.36	0.44	0.50	0.008	0.01	0.04	0.30

ISSN: 2049-1891