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Table 6 Effects of phytase on apparent total tract digestibility (ATTD) of phosphorus and calcium in growing pigs 1 , Exp. 2

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 1521 1460 1506 1497 1476 1476 58.08 0.47 0.67 0.93 0.81
Phosphorus intake, g/d 8.52 4.82 5.12 5.09 5.02 5.02 0.23 < 0.01 0.37 0.83 0.58
Fecal output, g/d 132.86 118.24 116.94 115.95 117.48 123.99 5.48 0.08 0.96 0.36 0.53
Phosphorus in feces, % 2.59 2.44 1.82 1.52 1.31 1.09 0.07 0.17 < 0.01 < 0.01 < 0.01
Phosphorus output, g/d 3.41 2.87 2.12 1.76 1.54 1.36 0.10 < 0.01 < 0.01 < 0.01 < 0.01
ATTD of phosphorus, % 59.4 39.8 58.1 65.4 69.1 72.8 2.25 < 0.01 < 0.01 < 0.01 < 0.01
Phosphorus absorption, g/d 5.10 1.94 3.00 3.33 3.47 3.66 0.24 < 0.01 < 0.01 < 0.01 < 0.01
Calcium intake, g/d 12.02 8.47 8.89 8.53 8.26 7.97 0.36 < 0.01 0.902 0.13 0.84
Calcium in feces, % 2.45 2.33 1.40 1.29 1.22 0.91 0.13 0.54 < 0.01 < 0.01 < 0.01
Calcium output, g/d 3.20 2.74 1.62 1.50 1.46 1.13 0.16 0.07 < 0.01 < 0.01 < 0.01
ATTD of calcium, % 72.9 67.3 81.4 82.6 82.4 85.6 2.05 0.07 < 0.01 < 0.01 < 0.01
Calcium absorption, g/d 8.82 5.72 7.26 7.03 6.80 6.84 0.39 < 0.01 < 0.01 0.38 0.12
  1. 1Data are means of 8 observations per treatment.
  2. 2L = linear contrast; Q = quadratic contrast.