Table 5.

Standardized ileal digestibility of essential amino acid of 22 rapeseed meal samples varying in protein solubility in Pekin ducks¹%.

Sample number	PS	Lys	Met	Arg	Ile	Leu	Thr	Val	Phe	His	TEAA
1	15.06	61.15	89.65	78.15	72.25	77.62	68.87	72.30	80.63	80.36	78.32
2	15.93	54.68	88.23	76.42	72.18	75.92	67.83	72.51	78.75	77.59	76.88
3	17.69	60.91	94.53	84.93	77.72	84.49	79.65	78.81	85.55	83.65	82.57
4	19.83	54.62	93.47	81.49	74.15	80.58	74.36	74.78	81.75	79.27	78.44
5	23.67	61.92	92.59	82.95	75.76	82.36	77.94	77.10	83.69	81.80	80.81
6	25.79	61.98	93.88	78.78	74.11	78.28	69.61	73.93	81.79	80.37	79.37
7	27.72	58.06	95.71	83.49	76.73	82.64	77.64	77.06	83.73	82.35	80.93
8	34.95	66.45	83.18	79.46	75.09	78.59	72.25	74.83	81.31	81.53	80.13
9	45.45	60.38	81.44	81.20	73.37	78.99	73.95	73.82	79.24	79.57	77.67
10	49.50	68.40	92.86	80.16	74.35	78.69	67.67	74.45	82.84	83.42	81.70
11	53.87	69.15	91.04	79.51	74.43	78.37	70.21	74.39	81.15	82.37	80.43
12	55.77	70.32	93.35	81.73	76.84	80.68	73.40	76.99	83.55	83.57	82.66
13	59.26	74.43	87.50	83.71	79.72	83.30	75.57	79.74	85.92	85.65	85.01
14	60.42	71.22	95.67	82.26	76.30	81.10	73.11	76.66	83.67	83.43	82.73
15	65.81	70.77	93.74	80.61	75.41	80.16	71.82	75.62	82.69	83.72	81.92
16	68.87	69.64	95.78	82.45	75.96	80.55	73.44	76.22	83.25	83.12	82.51
17	70.73	70.02	87.55	81.14	75.61	79.97	72.29	76.17	82.84	83.34	81.91
18	85.86	73.70	91.82	83.93	79.45	82.70	75.60	79.91	85.15	85.41	84.71
19	89.72	72.20	87.25	82.60	78.25	82.35	75.29	78.91	85.60	85.79	84.14
20	92.60	69.77	86.51	80.53	76.43	80.17	72.38	75.95	84.01	83.86	82.00
21	96.24	64.88	84.68	82.37	74.71	80.45	76.30	76.10	81.70	81.61	79.79
22	98.08	71.98	95.93	83.33	78.67	82.48	74.53	78.19	85.95	84.19	84.21
SEM	-	2.25	2.15	1.41	1.64	1.49	1.74	1.55	1.48	1.14	1.52
P-value	-	<0.0001	<0.0001	0.005	0.055	0.012	<0.0001	0.016	0.019	<0.0001	0.004
Mean	53.31	66.21	90.74	81.42	75.80	80.47	73.35	76.11	82.94	82.54	81.18
SD	28.05	6.05	4.35	2.09	2.10	2.10	3.21	2.15	2.03	2.13	2.18
CV%	62.62	9.13	4.79	2.57	2.77	2.61	4.38	2.82	2.45	2.58	2.69
Max	98.08	74.43	95.93	84.93	79.72	84.49	79.65	79.91	85.95	85.79	85.01
Min	15.06	54.62	81.44	76.42	72.18	75.92	67.67	72.30	78.75	77.59	76.88

Abbreviations: Arg, arginine; His, histidine; Ile, isoleucine; Leu, leucine; Lys, lysine; Max, maximum; Met, methionine; Min, minimum; Phe, phenylalanine; PS, protein solubility; TEAA, total essential amino acid; Thr, threonine; Val, valine.

¹Means represent 6 cages of ducks, 6 ducks per cage, fed diets containing 15% RSM:85% corn-SBM basal diet from 14 to 18 d of age. A nitrogen-free diet was used for standardization of apparent digestibility.