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Crude Protein Fractionation and Degradation Parameters of Limpograss Herbage

^a Agron. Dep., P.O. Box 110300, Univ. of Florida, Gainesville, FL 32611-0300
^b W.E. Kunkle (deceased)
^c Dep. of Anim. Sci., P.O. Box 110910, Univ. of Florida, Gainesville, FL 32611-0910

View larger version (31K): [in a new window]   Fig. 1. Concentrations of crude protein (CP) Fractions A, B, and C in limpograss herbage CP for canopies grazed at different heights and sampled in layers (U = upper, L = lower). Fractions include soluble (A), potentially degradable (B), and undegradable (C). The effect of canopy height on Fraction A was linear (P = 0.034) and quadratic (P = 0.023); the effect on Fraction B was quadratic (P = 0.023); and the effect on Fraction C was linear (P = 0.011).

View larger version (23K): [in a new window]   Fig. 2. Concentrations of crude protein (CP) Fractions A, B, and C in the dry matter (DM) of limpograss herbage for canopies grazed at different heights and sampled in layers (U = upper, L = lower). Fractions include soluble (A), potentially degradable (B), and undegradable (C). The effect of canopy height on Fraction A was linear (P = 0.029) and quadratic (P = 0.102); the effect on Fraction B was not significant (P = 0.327); and the effect on Fraction C was not significant (P = 0.414).

View larger version (34K): [in a new window]   Fig. 3. Degradation of (A) dry matter (DM) and (B) crude protein (CP) of limpograss herbage from canopies grazed at different heights (across upper and lower layers). Equations correspond to the non-lag section of the curves.