Fig. 4
The R2 of fitted curves of 8 models for 3 categories of feedstuff. R2 are the average of each category of feedstuff. (a) energy feeds; (b) protein feeds; (c) roughages; (d) all feedstuffs. Means with different letters differ (P < 0.05). EXP0: exponential without lag phase; EXPL: exponential with lag phase; GOM: Gompertz; LOG: logistic; LE0: logistic-exponential without lag phase; LEL: logistic-exponential with lag phase; MIT: Mitscherlich; MM: Michaelis‒Menten.
