Table 2.
Performance of the Japanese quail in the laying phase (64–168 D of age) with levels of calcium and available phosphorus.
| Ca (%) |
1.70 |
2.40 |
3.10 |
3.80 |
SE | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| aP (%) | 0.15 | 0.30 | 0.45 | 0.60 | 0.15 | 0.30 | 0.45 | 0.60 | 0.15 | 0.30 | 0.45 | 0.60 | 0.15 | 0.30 | 0.45 | 0.60 | |
| IBW (g) | 160.07 | 163.02 | 162.08 | 162.80 | 157.63 | 161.87 | 162.93 | 160.70 | 158.26 | 159.33 | 162.40 | 160.78 | 157.40 | 157.87 | 157.40 | 160.60 | 0.571 |
| FBW (g) | 174.09 | 177.86 | 177.84 | 181.33 | 174.19 | 181.05 | 172.16 | 170.73 | 172.54 | 168.26 | 173.76 | 173.56 | 171.20 | 171.98 | 171.36 | 164.88 | 0.787 |
| DFI (g/bird/day) | 32.50 | 29.55 | 30.11 | 31.61 | 29.37 | 25.56 | 25.30 | 29.97 | 28.70 | 24.54 | 24.99 | 29.10 | 30.63 | 30.37 | 29.46 | 31.52 | 0.385 |
| EP (%) | 82.80 | 86.79 | 86.62 | 88.38 | 84.17 | 96.55 | 96.82 | 93.95 | 88.37 | 96.96 | 96.81 | 87.34 | 85.00 | 88.49 | 89.33 | 83.69 | 0.770 |
| EM (g eggs/bird/day) | 7.79 | 8.86 | 9.05 | 8.75 | 8.85 | 10.87 | 10.92 | 9.97 | 9.49 | 10.53 | 10.76 | 8.99 | 8.06 | 8.93 | 8.93 | 8.04 | 0.153 |
| FCEM | 4.19 | 3.33 | 3.33 | 3.61 | 3.34 | 2.35 | 2.32 | 3.01 | 3.02 | 2.33 | 2.32 | 3.24 | 3.81 | 3.40 | 3.30 | 3.92 | 0.087 |
| FCDZ | 0.63 | 0.49 | 0.52 | 0.54 | 0.63 | 0.39 | 0.40 | 0.44 | 0.49 | 0.38 | 0.38 | 0.53 | 0.57 | 0.51 | 0.49 | 0.62 | 0.012 |
| Viability (%) | 96.67 | 90.00 | 100.00 | 96.67 | 80.00 | 96.67 | 100.00 | 83.33 | 90.00 | 93.33 | 96.67 | 90.00 | 96.67 | 100.00 | 96.67 | 90.00 | 1.412 |
| Age at first egg (days) | 48.00 | 49.67 | 48.00 | 50.00 | 50.00 | 50.00 | 46.67 | 47.67 | 50.33 | 49.00 | 51.33 | 48.67 | 53.33 | 49.00 | 50.33 | 51.67 | 0.580 |
| Regression equation | R2 |
P value |
Estimate |
|||
|---|---|---|---|---|---|---|
| Ca | aP | Ca x aP | Ca | aP | ||
| FBW = 183.8740 − 3.7544Ca | 0.30 | <0.0001 (L) | 0.1047 (NS) | 0.0745 | - | - |
| DFI = 61.9427 −20.0890Ca + 3.5990Ca2 −48.4681 aP + 65.2500aP2 | 0.76 | <0.0001 (Q) | <0.0001 (Q) | 0.7139 | 2.79 | 0.37 |
| EP = 19.4562 + 38.4014Ca-6.3618Ca2+123.74541 aP-124.0833aP2-28.7406Ca∗aP | 0.72 | <0.0001 (Q) | <0.0001 (Q) | 0.0107 | 2.74 | 0.40 |
| EM = −5.5681 + 8.81452Ca −1.5259Ca2 + 23.08904 aP −24.7130P2 -1.3432Ca∗aP | 0.85 | <0.0001 (Q) | <0.0001 (Q) | 0.0081 | 2.71 | 0.39 |
| FCEM = 11.9447 −5.1687Ca +0.8890Ca2 −13.6504Pd +15.1204P2 +0.7235Ca∗aP | 0.90 | <0.0001 (Q) | <0.0001 (Q) | 0.0024 | 2.75 | 0.39 |
| FCDZ = 1.6380 −0.5819Ca + 0.0948Ca2 −2.3777 aP+ 2.4537aP2 + 0.1597Ca∗aP | 0.82 | <0.0001 (Q) | <0.0001 (Q) | 0.0004 | 2.74 | 0.40 |
Abbreviations: aP, available phosphorus; DFI, daily feed intake; EM, egg mass; EP, egg production; FBW, final body weight; FCDZ, feed conversion ratio per dozen egg; FCEM, feed conversion ratio per egg mass IBW, initial body weight; L, linear effect; NS, nonsignicant; Q, quadratic effect.