Table 6.
Effect of dietary L-serine supplementation on serum biochemistry of laying hens fed the low crude protein diets.1
| Item2 | TP (g/L) | ALB (g/L) | GLOB (g/L) | AST (U/L) | ALT (U/L) | GLU (mmol/L) | UA (U/L) |
|---|---|---|---|---|---|---|---|
| Treatments3 | |||||||
| CON | 50.28 | 19.81 | 30.47 | 205.86 | 4.43 | 4.04 | 216.29 |
| LCP | 43.78ab | 20.14 | 23.64b | 226.50 | 3.00 | 3.45 | 175.00 |
| LCP + Ser0.114 | 42.13b | 18.74 | 23.39b | 220.33 | 4.17 | 4.02 | 156.17 |
| LCP + Ser0.306 | 51.75a | 21.21 | 30.54a | 217.67 | 3.00 | 4.47 | 165.50 |
| LCP + Ser0.498 | 49.88a | 20.79 | 29.09a | 193.50 | 4.50 | 3.76 | 169.67 |
| SEM | 1.586 | 0.414 | 1.330 | 4.889 | 0.362 | 0.195 | 11.313 |
| P-value | |||||||
| All groups | 0.216 | 0.406 | 0.207 | 0.230 | 0.506 | 0.605 | 0.476 |
| CON vs. LCP | 0.282 | 0.818 | 0.200 | 0.257 | 0.261 | 0.376 | 0.323 |
| LCP groups | 0.047 | 0.318 | 0.036 | 0.085 | 0.431 | 0.429 | 0.963 |
| Linear | 0.026 | 0.271 | 0.016 | 0.016 | 0.386 | 0.575 | 0.999 |
| Quadratic | 0.075 | 0.551 | 0.040 | 0.401 | 0.645 | 0.248 | 0.828 |
1
n = 8 replicates (6 eggs per replicate) per treatment.
2
Abbreviations: ALB, albumin; ALT, alanine transaminase; AST, aspartate transaminase; GLOB, globulin; GLU, glucose; TP, total protein; UA, uric acid.
3
CON, the control diet (16.49% CP); LCP, the low crude protein diets (14.05% CP); LCP + Ser0.114 (0.306 or 0.498), the low crude protein diet supplemented with 0.114% (0.306% or 0.498%) L-serine.
a,b
Within a column, means with no common small letters (a, b) differ significantly (P < 0.05) among LCP groups.