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. 2014 Dec 19;95(5):878–896. doi: 10.1002/jsfa.6998

Table 5.

In vivo hydrolysis of IP6 in different feed ingredients by exogenous phytase (data derived from Leske and Coon32)

Ingredients Total P (g kg−1)a IP6 P (g kg−1)a % IP6 P/total P Hydrolysis of IP6 (%)
Increase
Total P retention (%)
Diff. (% points) IP6-P releaseb by 100 FTU phytase % IP6-P released by 100 FTU phytase
− phytase + phytase % points IP-P release** − phytase + phytase
Broilers
 SBM 2.15 1.12 52.1 34.9 72.4 37.5 0.42 27 58 31.0 0.070 6.25
 Corn 1.77 1.43 80.8 30.8 59 28.2 0.40 34.8 40.9 6.1 0.067 4.66
 Rice bran 5.96 4.8 80.5 33.2 48 14.8 0.71 15.5 26.5 11.0 0.118 2.47
 Canola meal 3.51 2.41 68.7 36.7 55.8 19.1 0.46 39.4 45.7 6.3 0.077 3.18
 Barley 2.22 1.68 75.7 32.2 71.3 39.1 0.66 40.3 55.5 15.2 0.110 6.55
 Wheat 2.22 1.98 89.2 30.7 46.8 16.1 0.32 16 33.8 17.8 0.053 2.69
 Wheat midds 3.96 3.5 88.4 29.1 52.2 23.1 0.81 31.9 43.4 11.5 0.135 3.86
Laying hens
 SBM 2.73 1.41 51.6 25.7 62.4 36.7 0.52 36.8 53.4 16.6 0.173 12.29
 Corn 1.83 1.34 73.2 23 52 29.0 0.39 28.6 44.7 16.1 0.130 9.70
 Rice bran 11.3 9.14 80.9 36.1 50.9 14.8 1.35 35.9 43 7.1 0.450 4.92
a

Analyzed value in test diets as fed basis. Birds were placed in the cages and fed experimental diets for 3 days, then excreta were collected for 48 and 72 h for the broiler and layer trial, respectively.

b

IP6-P release, expressed as g kg−1, is calculated as percentage increase in IP6-P hydrolysis multiplied by IP6-P content (g kg−1) in the feed.