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. 2021 May 28;99(7):skab176. doi: 10.1093/jas/skab176

Table 3.

Effect of novel consensus bacterial 6-phytase on growth performance in pigs during 73 to 136 d of age fed diets formulated with a full nutrient matrix including reduction of calcium, net energy, digestible amino acids, and no added inorganic phosphorus

P-values
Item1 PC2 NC2 NC+PhyG 500 FTU/kg NC+PhyG 1,000 FTU/kg SEM ANOVA PC vs. NC PhyG vs. NC3,4 PhyG 500 FTU/kg vs. PC4 PhyG 1,000 FTU/kg vs. PC4 Phytase dose-response, linear5
Initial BW, 73 d of age, kg/pig 23.37 23.37 23.42 23.42 - - - - - - -
Grower 1, 73 to 112 d of age
112 d of age BW, kg/pig 54.2 51.7 53.1 53.6 0.69 0.085 0.013 0.056 0.338 0.978 0.963
ADG, g/d 791.5 727.5 761.8 777.0 17.72 0.084 0.012 0.056 0.338 0.977 0.198
ADFI, g/d 1507.2 1454.3 1524.9 1495.3 33.71 0.506 0.250 0.195 0.593 0.632 0.591
FCR, g/g 1.91 2.02 2.00 1.92 0.028 0.019 0.009 0.104 0.023 0.381 0.036
Mortality, % 2.3 3.4 1.1 0.1 1.54 0.449 - - - - -
Grower 2, 112 to 136 d of age
136 d of age BW, kg/pig 77.9 73.9 76.9 78.3 1.233 0.050 0.026 0.017 0.726 0.391 0.164
ADG, g/d 989.5 921.9 994.5 1028.2 32.14 0.143 0.107 0.025 0.461 0.607 0.019
ADFI, g/d 2262.4 2104.3 2276.8 2262.4 61.02 0.165 0.063 0.039 0.857 0.924 0.174
FCR, g/g 2.31 2.3 2.31 2.24 0.034 0.455 0.925 0.387 0.411 0.126 0.341
Mortality, % 1.1 1.1 1.1 2.3 1.24 0.890 - - - - -
Overall, 73 to 136 d of age
ADG, g/d 866.1 800.8 851.2 872.9 18.76 0.041 0.026 0.013 0.461 0.606 0.040
ADFI, g/d 1788.8 1696.8 1810.2 1785.5 37.40 0.185 0.086 0.041 0.680 0.742 0.327
FCR, g/g 2.07 2.14 2.12 2.06 0.019 0.013 0.032 0.078 0.009 0.095 0.493
Diet cost6, USD/ton 235.7 229.3 229.5 229.7 - - - - - - -
Feed cost/kg live weight, USD 0.351 0.342 0.349 0.338 0.004 0.064 0.097 0.073 0.775 0.047 -

1All values are corrected for mortality.

2PC, positive control diet; NC, negative control diet.

3Pooled data from 500 and 1,000 FTU/kg treatments.

4Probability of contrast, using Least Squares means contrast.

5Linear 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).

6Diet cost calculated based on current reported ingredient prices (Nov. 2020).