. 2017 Oct 1;8:78. doi: 10.1186/s40104-017-0209-x

Table 6.

Coefficients of digestibility (%) according to amount of supplement fed

Item^a	Treatment^b				SEM	P-value^c
Item^a	3.0 kg	1.5 kg	1.0 kg	0.0 kg	SEM	L	Q	C
OM	53.87	45.94	44.44	39.57	3.30	<0.01	0.42	0.01
apNDF	52.39	49.52	50.22	48.77	2.55	0.18	0.69	0.25
CP	48.12	39.14	36.54	17.70	8.98	0.03	0.53	0.11

^aDM – dry matter; OM – organic matter; apNDF – neutral detergent fiber corrected for ash and protein residue; CP – crude protein

^bTreatments: 3.0 kg – cows received 3.0 kg of concentrate daily; 1.5 kg – cows received 1.5 kg of concentrate daily; 1.0 kg – cows received 1.0 kg of concentrate daily; and 0.0 kg – no concentrate supplement was fed

^cL, Q and C – effects of linear, quadratic and cubic order of level of supplementation