Table 10.

Effects of dietary treatments on essential amino acid plasma concentrations (μg/g) in broiler chickens.

Treatment			Arginine	Histidine	Isoleucine	Leucine	Lysine	Methionine	Phenylalanine	Threonine	Tryptophan	Valine
Crude protein, g/kg	Feed grain	Arginine:lysine ratio
210	Wheat	104	39.5	8.1	19.3b	28.0	37.0	23.6	24.8	92.5	6.5	41.1
		110	53.2	7.6	16.2ab	23.6	35.2	21.4	20.3	72.1	5.3	35.6
	Sorghum	104	43.7	6.4	11.6a	31.5	42.6	19.0	21.5	61.4	6.7	24.0
		110	61.9	7.0	11.6a	32.6	33.9	19.0	23.3	66.7	5.4	24.5
170	Wheat	104	50.7	6.2	15.6ab	24.4	67.9	38.5	23.6	139.8	6.9	41.2
		110	63.9	5.2	14.3a	23.0	58.1	39.0	22.9	132.3	5.2	38.8
	Sorghum	104	68.7	5.4	14.2a	29.2	58.1	35.2	25.2	127.1	5.0	32.6
		110	87.6	5.3	13.8a	28.9	54.5	35.9	24.7	125.5	4.5	31.4
SEM			8.17	0.71	1.66	2.43	5.68	3.26	2.19	14.00	3.25	3.25
Main effects: feed grain
Wheat			51.8a	6.7b	16.4	24.8a	49.6	30.6	22.9	109.2	5.9	39.2b
Sorghum			65.5b	6.0a	12.8	30.6b	47.3	27.3	23.7	95.2	5.4	28.1a
CP, g/kg
210			50.0a	7.3	14.7	28.9	37.2a	20.8a	22.5	73.2a	5.9	31.3a
170			67.6b	5.5	14.5	26.4	59.6b	37.1b	24.1	131.2b	5.4	36.0b
Arginine:lysine ratio
104			50.6a	6.5	15.2	28.3	51.4	29.1	23.8	105.2	6.2b	34.7
110			66.6b	6.3	14.0	27.0	45.4	28.9	22.8	99.2	5.1a	32.6
Significance (P-value)
Feed grain			0.029	0.001	0.005	0.002	0.574	0.161	0.618	0.166	0.252	<0.001
CP			0.004	0.158	0.871	0.149	<0.001	<0.001	0.301	<0.001	0.254	0.049
Arginine:lysine ratio			0.010	0.614	0.317	0.473	0.147	0.935	0.535	0.547	0.023	0.352
Feed grain × CP			0.219	0.437	0.034	0.799	0.279	0.965	0.544	0.672	0.150	0.195
Feed grain × arginine:lysine ratio			0.657	0.516	0.401	0.349	0.967	0.788	0.287	0.429	0.567	0.427
CP × arginine:lysine ratio			0.995	0.357	0.782	0.817	0.861	0.745	0.819	0.881	0.836	0.878
Feed grain × CP × arginine:lysine ratio			0.952	0.901	0.632	0.545	0.423	0.808	0.333	0.620	0.467	0.611

CP = crude protein.

^{a b}Within a column, means without a common superscript differ at P < 0.05.