AP	Available phosphorus
CA	Crude ash
AIC	Akaike information criterion
AR1	First-order autoregressive
ARMA	Autoregressive moving average
CF	Crude fiber
CP	Crude protein
CS	Compound symmetry
DE	Digestible energy
DM	Dry matter
DS	Dongshan
EE	Ether extract
FCR	Feed conversion ratio
GAMM	Generalized additive mixed model
LM	Linear model
LMM	Linear mixed model
LT	Longtan
PS	Pushi
RMSE	Root mean square error
SD	Standard deviation
TP	Total phosphorus
TY	Taoyuan