Table 4.

Effect of novel consensus bacterial 6-phytase on apparent total tract digestibility (ATTD, %) of nutrients in pigs at 136 d of age fed diets formulated with a full nutrient matrix including reduction of calcium, net energy, and digestible amino acids and no added inorganic phosphorus

						P-values
Item	PC1	NC1	NC+PhyG 500 FTU/kg	NC+PhyG 1,000 FTU/kg	SEM	ANOVA	PC vs. NC	PhyG vs. NC2,3	PhyG 500 FTU/kg, vs. PC3	PhyG 1,000 FTU/kg, vs. PC3	Phytase dose-response, linear4
DM	83.0	82.6	83.1	83.8	0.44	0.278	0.603	0.120	0.878	0.143	0.037
Ca	43.8	43.7	44.8	50.0	2.68	0.291	0.968	0.285	0.804	0.111	0.100
P	48.2	34.5	53.8	58.0	1.70	<0.001	<0.001	<0.001	0.022	<0.001	<0.001
DE, kcal/kg	3,448.0	3,410.1	3,422.9	3,455.5	17.90	0.253	0.189	0.173	0.289	0.751	0.053

¹PC, positive control diet; NC, negative control diet.

²Pooled data from 500 and 1,000 FTU/kg treatments.

³Probability of contrast, using Least Squares means contrast.

⁴Linear regression analysis was performed with increasing PhyG dose from 0 (NC) to 1,000 FTU/kg excluding PC, using orthogonal polynomial regression (where the P-value is for phytase dose slope).