View Full Table | Close Full ViewTable 1.

Dry matter content and nutrient composition of the feedstuffs used in high-P and(low-P) diets

 
Item Forage (range)1 Alfalfa2
DM, % 62 (58 to 69) 89
CP, % of DM 14.3 (13.8 to 14.9) 15.03
P, % of DM 0.25 (0.24 to 0.27) 0.25
Ca, % of DM 0.56 (0.52 to 0.60) 1.76
Mg, % of DM 0.20 (0.19 to 0.22) 0.20
ME,4 MJ/kg 10.6 (10.0 to 11.3) 8.53
1Fed ad libitum.
2250 g/d pelleted alfalfa (Lantmännen Krafft AB, Falkenberg, Sweden).
3Values from the manufacturer (Lantmännen Krafft AB, Falkenberg, Sweden).
4According to Lindgren (1979).



View Full Table | Close Full ViewTable 2.

Apparent Ca, P, and Mg balances (g/d) in young horses fed a forage-only diet with (high-P) or without (low-P) a mineral supplement

 
P-value1
Item High-P Low-P SEM Treatment High-P Low-P
Ca
    Intake, g/d 60.5 39.0 0.6 <0.01
    Fecal excretion, g/d 25.5 18.0 0.8 <0.01
    Urine excretion, g/d 22.1 13.4 4.4 0.19
    Retained, g/d 13.0 7.6 4.8 0.44 <0.05 0.50
P
    Intake, g/d 32.0 17.5 0.6 <0.01
    Fecal excretion, g/d 30.3 17.0 0.8 <0.01
    Urine excretion, g/d 0.1 0.1 0.0 0.40
    Retained, g/d 1.6 0.3 0.6 0.16 <0.05 0.63
Mg
    Intake, g/d 27.4 14.6 0.5 <0.01
    Fecal excretion, g/d 16.6 7.8 0.8 <0.01
    Urine excretion, g/d 5.4 5.1 0.4 0.55
    Retained, g/d 5.4 1.7 1.2 0.04 <0.05 0.18
1Treatment = P-values for differences between treatments; High- and Low-P = P-value on the difference from 0 (H ≠ 0) for retention.



View Full Table | Close Full ViewTable 3.

Estimated apparent digestibility by using AIA and lignin as internal markers in young horses fed a forage-only diet with (high-P) or without (low-P) a mineral supplement

 
Item High-P Low-P SEM P-value
AIA
    DM, % 57.6 57.6 0.9 1.00
    P, % 5.4 2.0 2.2 0.30
    Ca, % 58.0 53.6 1.8 0.11
    Mg, % 39.1 45.3 4.0 0.29
Lignin
    DM, % 47.6 43.8 2.3 0.31
    P, % –18.2 –32.6 6.6 0.20