Figure 1.
Figure 1.

Relationship between intake [mg/(kg BW·d)] and estimated fecal excretion [mg/(kg BW·d)] of P, Ca, and Mg in 14 young horses fed a forage-only diet with or without a mineral supplement (P: y = 0.9x + 2.5, r2 = 0.93, CV = 8.5%, and P < 0.001; Ca: y = 0.3x + 11.5, r2 = 0.63, CV = 16.8%, and P < 0.001; Mg: y = 0.6x – 0.7, r2 = 0.69, CV = 19.5%, and P < 0.001).