. 2020 Dec 29;100(3):100971. doi: 10.1016/j.psj.2020.12.068

Table 5.

Growth performance of broilers fed experimental diets of differing Lys concentrations.¹

Item	Dietary treatments					Pooled SEM	Model P-value
Item	NC	PC	0.30% LB	0.90% LB	1.50% LB	Pooled SEM	Model P-value
Body weight, g/chick
Day 0	41	41	41	41	41	1.3	1.000
Day 10	297^a,b	310^a	310^a	277^b,c	270^c	8.5	0.002
Day 21	980^b	1,089^a	1,088^a	932^c	807^d	14.0	<0.001
Day 35	2,042^b	2,333^a	2,340^a	2,119^b	1,874^c	37.3	<0.001
Body weight gain, g/chick
Day 0–10	256^a,b	269^a	270^a	237^b,c	229^c	7.5	<0.001
Day 10–21	683^b	774^a	763^a	652^c	536^d	10.7	<0.001
Day 21–35	1,063^b	1,220^a	1,260^a	1,187^a	1,061^b	31.0	<0.001
Day 0–35	2,001^b	2,291^a	2,299^a	2,078^b	1,834^c	37.2	<0.001
Feed intake,² g/chick
Day 0–10	303^a	309^a	298^a,b	283^b,c	278^c	7.3	0.010
Day 10–21	940^b,c	995^a	954^a,b	892^c	811^d	19.5	<0.001
Day 21–35	2,029^a,b	2,154^a	2,106^a	1,943^b,c	1,847^c	46.6	<0.001
Day 0–35	3,147^b,c	3,351^a	3,192^a,b	2,973^c,d	2,813^d	68.9	<0.001
Feed conversion ratio,² g/g
Day 0–10	1.18^b	1.11^c	1.11^c	1.20^a,b	1.23^a	0.013	<0.001
Day 10–21	1.38^b	1.32^b	1.25^c	1.37^b	1.51^a	0.025	<0.001
Day 21–35	1.91^a	1.77^b	1.69^b	1.64^b	1.75^b	0.046	0.001
Day 0–35	1.57^a	1.41^b,c	1.39^c	1.46^b	1.56^a	0.025	<0.001

^a–dMeans without a common superscript letter differ within a row (P < 0.05).

Abbreviations: LB, Lys biomass; NC, negative control; PC, positive control.

Values are least square means derived at 2 to 37 d post-hatch (study day 0–35) from between 9 and 12 replicate cages allotted with 6 chicks at study initiation.

Values have been corrected for mortality.