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. 2022 Jun 30;101(9):102038. doi: 10.1016/j.psj.2022.102038

Table 9.

Live performance of Ross 708 male broilers fed reduced CP diets supplemented with Gly from 0 to 48 d post-hatch in experiment 2.1

Item Treatments2
 SEM P-values
CTL RCP LCP88 LCP100 LCP112 LCP124 CTL vs. RCP CTL vs. LCP88 RCP vs. LCP88 Glycine
Linear Quadratic
0 to 14 d
 d 0 BW, kg/bird 0.047 0.046 0.046 0.046 0.046 0.046 0.0002 0.574 0.013 0.046 0.185 0.492
 d 14 BW, kg/bird 0.443 0.438 0.460 0.447 0.458 0.449 0.0055 0.462 0.033 0.006 0.398 0.771
 BWG, kg/bird 0.397 0.392 0.414 0.401 0.412 0.402 0.0048 0.476 0.024 0.004 0.361 0.763
 FI, kg/bird 0.488 0.488 0.526 0.506 0.511 0.498 0.0052 0.978 <0.001 <0.001 0.002 0.475
 FCR3, kg:kg 1.244 1.276 1.278 1.271 1.261 1.252 0.0089 0.005 0.005 0.850 0.027 0.935
0 to 28 d
 d 28 BW, kg/bird 1.475 1.478 1.482 1.460 1.480 1.466 0.0115 0.854 0.683 0.810 0.612 0.695
 BWG, kg/bird 1.429 1.431 1.436 1.414 1.434 1.420 0.0115 0.859 0.648 0.768 0.601 0.699
 FI, kg/bird 1.965 1.976 2.015 1.969 1.989 1.951 0.0136 0.489 0.008 0.039 0.007 0.798
 FCR3, kg:kg 1.378 1.384 1.408 1.394 1.391 1.378 0.0041 0.228 < 0.001 < 0.001 < 0.001 0.913
0 to 39 d
 d 39 BW, kg/bird 2.633 2.709 2.626 2.598 2.614 2.611 0.0184 0.002 0.761 0.001 0.734 0.495
 BWG, kg/bird 2.587 2.662 2.580 2.552 2.568 2.565 0.0184 0.002 0.792 0.002 0.721 0.487
 FI, kg/bird 3.828 3.888 3.872 3.824 3.848 3.792 0.0197 0.016 0.096 0.554 0.017 0.843
 FCR3, kg:kg 1.482 1.469 1.501 1.500 1.499 1.480 0.0050 0.037 0.005 < 0.001 0.004 0.071
0 to 48 d
 d 48 BW, kg/bird 3.472 3.516 3.437 3.420 3.477 3.391 0.0257 0.168 0.316 0.026 0.483 0.181
 BWG, kg/bird 3.425 3.469 3.391 3.374 3.431 3.345 0.0257 0.169 0.321 0.027 0.479 0.179
 FI, kg/bird 5.382 5.470 5.438 5.373 5.454 5.320 0.0305 0.022 0.180 0.423 0.052 0.262
 FCR3, kg:kg 1.574 1.579 1.601 1.598 1.592 1.584 0.0056 0.469 < 0.001 0.004 0.033 0.682

Abbreviations: BWG, body weight gain; CTL, control; FI, feed intake; LCP, low crude protein; RCP, reduced crude protein.

1

Values are least square means of 12 replicate pens for the control and RCP diets and 9 replicate pens for the LCP diets.

2

The LCP88, LCP100, LCP112, and LCP124 had an 88, 100, 112, and 124% increase in tGly + Ser, respectively, compared to the RCP diet.

3

Corrected for mortality.