. 2023 May 22;102(8):102796. doi: 10.1016/j.psj.2023.102796

Table 5.

The effect of broiler breeds fed-restricted diets and different levels of threonine and their interactions on some hormonal parameters.

Items/breed		Total feed cost/bird (EGP)	Feed cost per kg gain (EGP)	Total cost (EGP)/bird	Total return/bird (EGP)	Net return/bird (EGP)	Net return per kg gain (EGP)	Economic efficiency
Ross		29.36 ± 0.19	20.34 ± 0.19^b	44.61 ± 0.08	70.17 ± 0.38^a	25.56 ± 0.38^a	17.63 ± 0.01^a	0.86 ± 0.01^a
IR		29.59 ± 0.19	21.44 ± 0. 19^a	44.84 ± 0.08	68.17 ± 0.57^b	23.35 ± 0.57^b	16.62 ± 0.02^b	0.77 ± 0.01^b
Feed restriction
Control		29.56 ± 0.19	20.11 ± 0.19^b	44.81 ± 0.08	68.86 ± 0.57	24.05 ± 0.57	16.28 ± 0.19^b	0.81 ± 0.01
Feed restriction		29.40 ± 0.19	21.67 ± 0.19^a	44.65 ± 0.09	69.48 ± 0.57	24.83 ± 0.57	18.04 ± 0.57^a	0.83 ± 0.01
Threonine (%)
100		29.57 ± 0.57	20.96 ± 0.01^b	44.82 ± 0.15	64.47 ± 0.76^d	19.65 ± 0.76^d	13.72 ± 0.38^c	0.65 ± 0.02^d
110		29.37 ± 0.57	21.97 ± 0.02^a	44.62 ± 0.15	68.05 ± 0.38^c	23.44 ± 0.57^c	17.27 ± 0.76^b	0.79 ± 0.02^c
120		29.62 ± 0.57	21.52 ± 0.01^ab	44.87 ± 0.12	70.61 ± 0.57^b	25.74 ± 0.57^b	18.44 ± 0.38^a	0.86 ± 0.02^b
130		29.35 ± 0.57	19.10 ± 0.01^c	44.60 ± 0.14	73.55 ± 0.19^a	28.89 ± 0.57^a	18.96 ± 0.19^a	0.99 ± 0.02^a
Feed restriction*threonine (%)
Control	100	29.93 ± 0.17	21.26 ± 0.36^b	45.18 ± 0.19	64.77 ± 0.71^d	19.59 ± 0.76^d	13.70 ± 0.44^d	0.64 ± 0.03^d
	110	29.78 ± 0.17	20.59 ± 0.36^bc	45.03 ± 0.19	67.09 ± 0.71^c	22.17 ± 0.75^c	15.29 ± 0.44^c	0.74 ± 0.03^c
	120	29.51 ± 0.17	19.56 ± 0.36^cd	44.76 ± 0.17	70.14 ± 0.71^b	25.38 ± 0.76^b	16.77 ± 0.44^b	0.86 ± 0.03^b
	130	29.13 ± 0.17	18.99 ± 0.36^d	44.38 ± 0.20	73.44 ± 0.71^a	29.07 ± 0.57^a	19.14 ± 0.44^a	1.01 ± 0.03^a
Feed restriction	100	29.21 ± 0.17	20.66 ± 0.36^bc	44.46 ± 0.19	64.17 ± 00.71^d	19.71 ± 0.75^d	13.74 ± 0.44^d	0.67 ± 0.03^cd
	110	29.06 ± 0.17	23.34 ± 0.36^a	44.31 ± 0.19	69.03 ± 0.71^bc	24.72 ± 0.76^b	19.55 ± 0.44^a	0.84 ± 0.03^b
	120	29.74 ± 0.17	23.48 ± 0.36^a	44.99 ± 0.17	71.08 ± 0.71^b	26.09 ± 0.76^b	20.41 ± 0.44^a	0.87 ± 0.03^b
	130	29.58 ± 0.17	19.20 ± 0.36^d	44.83 ± 0.19	73.65 ± 0.71^a	28.82 ± 0.75^a	18.86 ± 0.44^a	0.98 ± 0.03^a

The mean values in same column within each division with different superscripts (a–d) differ significantly (P < 0.05).