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Table 5 Effects of phytase on apparent total tract digestibility (ATTD) of phosphorus and calcium in weanling pigs 1 , Exp. 1

From: Effects of a novel bacterial phytase expressed in Aspergillus Oryzae on digestibility of calcium and phosphorus in diets fed to weanling or growing pigs

Item Diets SEM P- value P-value2
  Positive control Negative control 500 phytase 1,000 phytase 2,000 phytase 4,000 phytase Positive vs. negative Negative vs. phytase L Q
Feed intake, g/d 645 633 629 646 624 611 18.06 0.65 0.77 0.28 0.69
Phosphorus intake, g/d 4.26 2.28 2.26 2.33 2.25 2.14 0.08 < 0.01 0.68 0.12 0.49
Fecal output, g/d 66.48 58.79 58.06 56.11 57.15 62.61 3.77 0.16 0.94 0.37 0.36
Phosphorus in feces, % 2.53 2.30 1.51 1.46 1.22 1.10 0.07 0.023 < 0.01 < 0.01 < 0.01
Phosphorus output, g/d 1.68 1.35 0.87 0.81 0.71 0.68 0.07 < 0.01 < 0.01 < 0.01 < 0.01
ATTD of phosphorus, % 60.5 40.5 61.6 65.1 68.7 68.0 2.34 < 0.01 < 0.01 < 0.01 < 0.01
Phosphorus absorption, g/d 2.58 0.93 1.39 1.51 1.54 1.46 0.07 < 0.01 < 0.01 < 0.01 < 0.01
Calcium intake, g/d 5.55 3.04 3.02 3.30 3.49 3.23 0.10 < 0.01 0.07 0.07 < 0.01
Calcium in feces, % 2.29 1.86 1.37 1.11 0.94 0.79 0.13 0.019 < 0.01 < 0.01 < 0.01
Calcium output, g/d 1.52 1.09 0.80 0.60 0.52 0.50 0.08 < 0.01 < 0.01 < 0.01 < 0.01
ATTD of calcium, % 72.5 63.9 73.7 81.7 84.8 84.6 2.30 0.012 < 0.01 < 0.01 < 0.01
Calcium absorption, g/d 4.02 1.95 2.22 2.69 2.97 2.74 0.12 < 0.01 < 0.01 < 0.01 < 0.01
  1. 1Data are means of 8 observations per treatment.
  2. 2L = linear contrast; Q = quadratic contrast.