Table 4.
Effects of phytase supplementation on blood biochemical characteristics of laying hens at 80 wk of age.
| Parameters | % of NPP without phytase |
% of NPP with phytase |
SEM | P value | ||||
|---|---|---|---|---|---|---|---|---|
| 0.20 | 0.25 | 0.30 | 0.20 | 0.25 | 0.30 | |||
| ALB (g/dL) | 2.30ab | 2.20b | 2.32ab | 2.33ab | 2.43a | 2.37a | 0.02 | 0.02 |
| TP (IU/L) | 7.61 | 6.51 | 7.29 | 6.91 | 7.63 | 7.36 | 0.14 | 0.12 |
| CHOL (mg/dL) | 164.77 | 171.29 | 201.08 | 193.91 | 168.28 | 191.10 | 5.34 | 0.22 |
| HDL (mg/dL) | 6.54b | 8.713ab | 11.33a | 11.52 | 11.37 | 11.61 | 0.59 | 0.05 |
| GLU (mg/dL) | 281.42 | 297.65 | 275.07 | 291.49 | 288.76 | 301.88 | 3.57 | 0.26 |
| ALT (g/dL) | 0.76 | 0.71 | 0.86 | 0.78 | 0.73 | 0.95 | 0.11 | 0.98 |
| AST (mg/dL) | 187.01 | 195.77 | 193.81 | 191.97 | 197.32 | 199.36 | 3.37 | 0.93 |
| TG (IU/µL) | 2082 | 2194 | 2452 | 2494 | 2292 | 2128 | 75.58 | 0.53 |
| Ca (mg/dL) | 15.68 | 16.56 | 16.97 | 17.24 | 17.45 | 17.62 | 0.21 | 0.08 |
| P (mg/dL) | 5.58b | 5.93b | 6.43ab | 6.63ab | 7.24a | 7.06a | 0.17 | 0.02 |
Values with different superscripts in the same row are significantly different (P < 0.05). SEM, standard error of the mean; ALB, albumin; TP, total protein; CHOL, cholesterol; HDL, high-density lipoprotein; GLU, glucose; ALT, alanine aminotransferase; AST, aspartate aminotransferase; TG, triglyceride; Ca, calcium; P, phosphorus. Ronozyme HiPhos-L, 6-phytase produced by the strain of Aspergillus oryzae was used to supply 1,000 FTY per kg of feed.