不同来源玉米28日龄白羽肉鸡标准回肠氨基酸消化率评定和预测方程的建立

doi:10.11843/j.issn.0366-6964.2025.02.023

Abstract

Abstract:

This study aimed to analyze the nutrients content of corn from ten different sources, determine the apparent ileal amino acid digestibility (AID AA) and standardized ileal amino acid digestibility (SID AA) of corn in 28-day-old white-feathered broilers and construct the prediction equations of SID AA. A total of 330 1-day-old healthy male broilers (Arbor Acres) were randomly divided into 11 groups with 6 replicates per group and 5 broilers per replicate. At the age of 25 d, broilers in 11 treatments were fed 10 experimental diets which the protein sources only came from corn and a nitrogen-free diet, respectively. All broilers were euthanized on 28 d, and the ileal digesta were collected to determine the standardized ileal amino acid digestibility. The results showed that, the average content of dry matter(DM), crude protein(CP), ether extract(EE), Ash, crude fiber(CF), neutral detergent fiber(NDF), acid detergent fiber(ADF), nitrogen-free extract(NFE), phytic acid(PA), total phosphorous(TP), total starch(TS) of corn from 10 different sources were 87.14%, 9.04%, 3.94%, 1.36%, 1.97%, 10.07%, 2.61%, 70.82%, 0.84%, 0.26% and 74.56%, respectively. The content of 18 amino acids ranged from 0.20% to 1.99%. Pro had the highest coefficient of variation (22.84%) and the coefficient of variation of Cys (10.34%) was the lowest. The AID and SID were the lowest for threonine (44.80% and 68.15%), and the highest for leucine (83.93% and 89.56%). The AID AA and SID AA were significantly affected by the sources(P < 0.05). A total of 16 SID AA prediction equations of corn in 28-day-old white-feathered broilers were constructed, among which SID Phe had the highest fitting degree (R²=0.962) and SID Gly had the lowest fitting degree (R²=0.478). In conclusion, the prediction equations established in this study had a better reference value for realizing precise nutrition and efficient utilization of corn in white-feathered broilers.

Key words: corn, white-feathered broiler, standardized ileal amino acid digestibility (SID AA), prediction equation

CLC Number:

S831.5

HANG Zhenyu, WANG Ziyi, ZHANG Lin, XING Tong, ZHAO Liang, GAO Feng. Evaluation and Prediction Equation Construction of Standardized Ileal Amino Acid Digestibility of Corn from Different Sources in 28-day-old White-feathered Broilers[J]. Acta Veterinaria et Zootechnica Sinica, 2025, 56(2): 722-736.

Figures/Tables 10

Table 1

Table 2

Table 3

Analyzed chemical properties of corn samples from different sources(dry matter basis) %"

项目 Item	C1	C2	C3	C4	C5	C6	C7	C8	C9	C10	均值 Mean	最小值 Min	最大值 Max	变异系数 CV
干物质DM	88.33	87.60	88.39	86.11	86.11	87.12	87.70	85.87	87.35	86.79	87.14	85.87	88.39	0.99
粗蛋白质CP	8.89	8.42	7.56	10.85	10.93	7.77	7.80	8.11	9.52	10.50	9.04	7.56	10.93	13.91
粗脂肪EE	3.27	3.38	3.58	3.83	4.13	6.24	4.04	3.51	3.31	4.12	3.94	3.27	6.24	21.01
粗灰分Ash	1.17	1.23	1.37	1.43	1.15	1.44	1.33	1.46	1.27	1.79	1.36	1.15	1.79	12.99
粗纤维CF	2.29	2.09	2.26	1.88	2.66	1.42	1.82	1.42	2.06	1.84	1.97	1.42	2.66	18.56
中性洗涤纤维NDF	8.41	9.21	9.29	9.57	11.64	8.21	10.99	9.01	10.21	14.20	10.07	8.21	14.20	17.01
酸性洗涤纤维ADF	2.22	2.34	2.50	2.39	3.04	1.26	3.18	2.90	2.88	3.39	2.61	1.26	3.39	22.29
无氮浸出物NFE	72.72	72.47	73.63	68.12	67.24	70.24	72.71	71.38	71.19	68.54	70.82	67.24	73.63	2.96
植酸PA	0.89	0.84	0.92	0.59	0.59	0.90	0.78	1.03	0.87	0.95	0.84	0.59	1.03	16.41
总磷TP	0.22	0.23	0.27	0.29	0.24	0.25	0.24	0.29	0.25	0.28	0.26	0.22	0.29	9.13
总淀粉TS	67.02	77.65	66.80	78.80	70.41	72.60	78.08	75.23	79.66	79.30	74.56	66.80	79.66	6.39
必需氨基酸EAA
苏氨酸Thr	0.31	0.31	0.39	0.38	0.43	0.42	0.43	0.42	0.40	0.52	0.40	0.31	0.52	14.51
缬氨酸Val	0.39	0.40	0.47	0.48	0.54	0.53	0.54	0.53	0.51	0.65	0.50	0.39	0.65	14.26
异亮氨酸Ile	0.26	0.26	0.32	0.31	0.36	0.35	0.36	0.36	0.34	0.44	0.34	0.26	0.44	14.78
亮氨酸Leu	0.97	1.06	1.26	1.22	1.38	1.39	1.34	1.43	1.29	1.68	1.30	0.97	1.68	14.43
苯丙氨酸Phe	0.37	0.38	0.48	0.46	0.51	0.51	0.51	0.52	0.49	0.63	0.49	0.37	0.63	14.29
赖氨酸Lys	0.28	0.27	0.34	0.32	0.37	0.35	0.28	0.38	0.34	0.45	0.34	0.27	0.45	15.33
组氨酸His	0.23	0.23	0.29	0.28	0.30	0.31	0.32	0.32	0.31	0.39	0.30	0.23	0.39	14.67
精氨酸Arg	0.36	0.33	0.43	0.44	0.32	0.45	0.49	0.47	0.44	0.64	0.44	0.32	0.64	19.87
蛋氨酸Met	0.21	0.22	0.20	0.31	0.23	0.21	0.22	0.25	0.19	0.28	0.23	0.19	0.31	15.53
色氨酸Trp	0.06	0.09	0.09	0.12	0.07	0.09	0.07	0.08	0.07	0.08	0.08	0.06	0.12	20.00
非必需氨基酸NEAA
甘氨酸Gly	0.32	0.30	0.40	0.39	0.44	0.41	0.46	0.43	0.41	0.55	0.41	0.30	0.55	16.20
天冬氨酸Asp	0.59	0.57	0.68	0.69	0.76	0.75	0.76	0.75	0.72	0.92	0.72	0.57	0.92	12.95
丝氨酸Ser	0.40	0.42	0.52	0.49	0.57	0.56	0.56	0.56	0.54	0.69	0.53	0.40	0.69	14.70
谷氨酸Glu	1.51	1.59	1.90	1.89	2.10	2.08	2.07	2.14	1.97	2.59	1.99	1.51	2.59	14.37
丙氨酸Ala	0.61	0.64	0.77	0.75	0.85	0.84	0.83	0.87	0.80	1.03	0.80	0.61	1.03	14.14
酪氨酸Tyr	0.23	0.22	0.30	0.31	0.36	0.30	0.31	0.32	0.29	0.42	0.31	0.22	0.42	17.56
脯氨酸Pro	0.67	0.70	0.84	0.83	0.50	0.91	0.94	0.96	0.97	1.20	0.85	0.50	1.20	21.65
半胱氨酸Cys	0.20	0.20	0.18	0.24	0.19	0.19	0.19	0.21	0.19	0.24	0.20	0.18	0.24	10.01

Table 3

Table 4

Apparent amino acid ileal digestibility of corn from different sources in white-feathered broliers %"

项目 Item	C1	C2	C3	C4	C5	C6	C7	C8	C9	C10	均值 Mean	最小值 Minimum	最大值 Maximum	变异系数 CV	P值 P-value
必需氨基酸EAA
苏氨酸Thr	56.84^a	55.78^ab	34.61^ef	45.57^abcde	44.23^bcde	52.83^abc	42.01^cdef	47.79^abcd	37.61^def	30.72^f	44.80	30.72	56.84	18.69	< 0.001
缬氨酸Val	76.65^a	76.70^a	62.98^cd	68.32^bc	70.66^ab	77.76^a	68.50^bc	70.73^ab	64.40^bcd	60.22^d	69.69	60.22	77.76	8.25	< 0.001
异亮氨酸Ile	75.99^ab	76.65^ab	61.44^de	66.56^cd	72.72^abc	79.91^a	65.84^cde	69.34^bcd	62.28^de	58.07^e	68.88	58.07	79.91	10.04	< 0.001
亮氨酸Leu	87.32^a	88.48^a	80.19^c	81.82^bc	85.88^ab	89.46^a	81.73^bc	85.98^ab	80.56^c	77.89^c	83.93	77.89	89.46	4.49	< 0.001
苯丙氨酸Phe	84.06^a	84.39^a	74.33^c	77.26^bc	81.07^ab	85.99^a	77.30^bc	80.94^ab	73.95^bc	71.99^c	79.13	71.99	85.99	5.84	< 0.001
赖氨酸Lys	67.86^ab	65.47^ab	52.11^cde	57.06^bc	59.45^abc	69.67^a	53.68^cd	58.51^abc	45.48^de	41.41^e	57.07	41.41	69.67	15.37	< 0.001
组氨酸His	80.24^a	79.74^ab	65.02^e	73.82^c	74.56^bc	80.67^a	72.65^cd	76.49^abc	66.81^e	68.32^de	73.83	65.02	80.67	7.28	< 0.001
精氨酸Arg	83.56^a	82.19^ab	73.14^cd	77.57^bc	78.17^abc	83.43^ab	77.93^abc	77.73^abc	71.05^d	73.96^cd	77.87	71.05	83.56	5.24	< 0.001
蛋氨酸Met	86.58^ab	83.88^ab	76.90^c	83.51^abc	79.38^bc	84.94^a	82.01^abc	84.36^ab	78.42^c	67.20^d	80.72	67.20	86.58	6.66	< 0.001
色氨酸Trp	67.71^ab	77.48^a	77.97^a	74.68^a	72.27^a	76.77^a	56.92^b	66.57^ab	55.59^b	33.23^c	65.92	33.23	77.97	20.20	< 0.001
非必需氨基酸NEAA
甘氨酸Gly	68.81^a	67.88^a	50.23^cd	57.92^bc	59.27^abc	63.51^ab	57.44^bc	61.39^ab	47.70^d	46.39^d	58.05	46.39	68.81	12.88	< 0.001
天冬氨酸Asp	74.07^a	73.61^a	59.34^bcd	64.30^bc	65.55^bc	74.02^a	62.62^bc	66.45^ab	58.07^cd	54.59^d	65.26	54.59	74.07	10.10	< 0.001
丝氨酸Ser	72.60^a	72.01^a	56.17^c	61.66^bc	62.85^bc	71.19^a	61.00^bc	66.19^ab	60.20^bc	55.78^c	63.97	55.78	72.60	9.30	< 0.001
谷氨酸Glu	86.45^a	86.92^a	77.73^cd	80.51^bc	82.57^ab	86.68^a	79.83^bcd	83.62^ab	77.82^cd	75.55^d	81.77	75.55	86.92	4.78	< 0.001
丙氨酸Ala	84.66^a	85.89^a	77.91^bc	78.30^bc	81.94^ab	86.28^a	78.95^bc	82.67^ab	78.17^bc	74.83^c	80.96	74.83	86.28	4.55	< 0.001
酪氨酸Tyr	80.83^ab	81.71^a	73.51^cd	75.19^bcd	66.53^e	75.66^abcd	74.57^bcd	79.01^abc	71.28^de	71.70^de	75.00	66.53	81.71	5.88	< 0.001
脯氨酸Pro	84.20^a	84.04^a	72.43^d	76.47^bcd	81.82^ab	82.87^a	75.62^cd	81.06^abc	74.95^d	72.88^d	78.63	72.43	84.20	5.59	< 0.001
半胱氨酸Cys	72.94^a	70.58^a	48.31^e	63.89^abc	57.30^cd	68.50^ab	60.16^bcd	65.01^abc	54.06^d	36.75^f	59.75	36.75	72.94	17.64	< 0.001

Table 4

Table 5

Standardized ileal amino acid digestibility of corn from different sources in white-feathered broliers %"

项目 Item	C1	C2	C3	C4	C5	C6	C7	C8	C9	C10	均值 Mean	最小值 Minimum	最大值 Maximum	变异系数 CV	P值 P-value
必需氨基酸EAA
苏氨酸Thr	81.01^a	79.28^ab	60.74^de	63.32^cde	66.67^bcd	75.22^abc	68.05^abcd	71.98^abcd	63.56^cde	51.69^e	68.15	51.69	81.01	12.51	< 0.001
缬氨酸Val	89.98^a	90.15^a	78.25^cd	79.73^bcd	84.03^abc	88.51^a	83.15^abc	87.01^ab	79.74^bcd	72.00^d	83.26	72.00	90.15	6.70	< 0.001
异亮氨酸Ile	90.62^a	89.46^ab	79.02^cd	79.35^cd	86.33^abc	92.31^a	82.78^abc	87.48^abc	79.78^bcd	71.00^d	83.81	71.00	92.31	7.49	< 0.001
亮氨酸Leu	92.84^a	94.04^a	86.74^bc	86.59^bc	90.12^ab	93.30^a	88.48^ab	91.89^ab	88.79^ab	82.81^c	89.56	82.81	94.04	3.78	0.001
苯丙氨酸Phe	92.43^a	92.96^a	84.16^bc	84.39^bc	89.26^ab	92.12^a	87.05^ab	90.04^ab	86.09^ab	79.37^c	87.79	79.37	92.96	4.74	< 0.001
赖氨酸Lys	86.29^a	84.71^ab	72.47^abc	71.25^bcd	77.34^abc	83.46^ab	74.06^abc	81.45^abc	67.06^cd	58.60^d	75.67	58.60	86.29	10.97	0.001
组氨酸His	88.94^a	88.47^ab	74.66^e	81.33^cd	83.30^abc	88.23^ab	82.34^bc	85.59^abc	74.49^e	75.94^de	82.33	74.49	88.94	6.54	< 0.001
精氨酸Arg	92.38^a	91.84^a	85.49^ab	86.70^ab	89.10^ab	92.87^a	89.47^ab	90.36^ab	83.24^b	83.29^b	88.47	83.24	92.87	3.87	0.043
蛋氨酸Met	89.32^a	91.20^a	84.49^a	87.67^a	85.55^a	91.29^a	87.99^a	87.24^a	84.91^a	73.24^b	86.29	73.24	91.29	5.68	0.001
色氨酸Trp	92.56^ab	97.87^a	94.85^a	87.96^ab	87.60^ab	90.16^ab	79.88^ab	84.94^ab	75.10^b	43.53^c	83.45	43.53	97.87	17.70	< 0.001
非必需氨基酸NEAA
甘氨酸Gly	83.34^ab	85.22^a	69.64^cd	72.70^bc	78.06^abc	80.63^ab	75.85^abc	83.13^ab	67.81^cd	61.76^d	75.81	61.76	85.22	9.66	< 0.001
天冬氨酸Asp	88.69^a	88.47^a	76.48^bcd	77.22^bcd	82.23^abc	85.96^ab	79.14^abc	85.00^ab	74.78^cd	68.12^d	80.61	68.12	88.69	7.83	< 0.001
丝氨酸Ser	87.60^a	86.94^ab	73.19^d	74.54^d	77.42^cd	83.89^abc	78.20^bcd	84.53^abc	77.90^bcd	69.42^d	79.36	69.42	87.60	7.35	< 0.001
谷氨酸Glu	91.62^abc	93.98^a	85.95^cd	86.50^bcd	89.77^abc	92.16^ab	88.09^abc	91.22^abc	87.63^bc	81.78^d	88.87	81.78	93.98	3.86	0.001
丙氨酸Ala	91.53^ab	92.60^a	85.55^bcd	84.31^cd	88.49^abc	92.20^a	86.59^abcd	90.08^abc	87.74^abc	80.69^d	87.98	80.69	92.60	4.11	0.001
酪氨酸Tyr	91.76^ab	92.54^a	85.42^bcd	84.28^cd	81.80^d	89.13^abc	86.68^abcd	91.38^ab	81.55^d	80.52^d	86.51	80.52	92.54	4.95	< 0.001
脯氨酸Pro	87.18^ab	89.19^a	78.19^d	80.49^bcd	85.92^abc	87.39^ab	81.29^bcd	86.21^abc	80.05^cd	77.03^d	83.29	77.03	89.19	4.95	< 0.001
半胱氨酸Cys	83.60^a	84.85^a	64.14^c	74.62^ab	71.73^bc	82.27^a	74.69^ab	76.19^ab	68.87^bc	52.18^d	73.31	52.18	84.85	12.82	< 0.001

Table 5

Table 6

Correlation analysis of corn chemical composition and standardiezd ileal amino acid digestibility"

项目 Item	干物质 DM	粗蛋白 CP	粗脂肪 EE	粗灰分 Ash	粗纤维 CF	中性洗涤纤维 NDF	酸性洗涤纤维 ADF	无氮浸出物 NFE	植酸 PA	总磷 TP	淀粉 TS
苏氨酸SID Thr	0.237	-0.448	0.037	-0.644*	-0.049	-0.760*	-0.592	0.414	0.073	-0.597	-0.326
甘氨酸SID Gly	0.005	-0.397	0.052	-0.588	-0.074	-0.690*	-0.484	0.282	-0.001	-0.432	-0.327
缬氨酸SID Val	0.125	-0.441	0.100	-0.645*	-0.069	-0.743*	-0.573	0.342	0.042	-0.554	-0.331
异亮氨酸SID Ile	0.091	-0.434	0.251	-0.629	-0.071	-0.747*	-0.648*	0.264	0.023	-0.543	-0.418
亮氨酸SID Leu	0.120	-0.451	0.125	-0.640*	-0.076	-0.744*	-0.596	0.337	0.109	-0.558	-0.306
苯丙氨酸SID Phe	0.128	-0.414	0.129	-0.681*	-0.013	-0.722*	-0.581	0.309	0.032	-0.604	-0.350
赖氨酸SID Lys	0.160	-0.475	0.108	-0.627	-0.022	-0.787**	-0.620	0.365	0.046	-0.487	-0.493
组氨酸SID His	-0.055	-0.252	0.250	-0.384	-0.179	-0.544	-0.539	0.093	-0.030	-0.417	-0.231
精氨酸SID Arg	0.083	-0.440	0.305	-0.449	-0.161	-0.624	-0.589	0.243	0.021	-0.468	-0.375
蛋氨酸SID Met	0.163	-0.467	0.132	-0.696*	-0.087	-0.865**	-0.666*	0.368	-0.184	-0.458	-0.243
色氨酸SID Trp	0.244	-0.425	-0.045	-0.754*	0.201	-0.852**	-0.605	0.401	-0.218	-0.378	-0.522
天冬氨酸SID Asp	0.120	-0.417	0.077	-0.638*	-0.012	-0.750*	-0.585	0.325	0.027	-0.515	-0.423
丝氨酸SID Ser	0.168	-0.457	-0.004	-0.560	-0.148	-0.724*	-0.524	0.417	0.222	-0.520	-0.242
谷氨酸SID Glu	0.075	-0.422	0.097	-0.658*	-0.055	-0.731*	-0.567	0.310	0.030	-0.542	-0.267
丙氨酸SID Ala	0.178	-0.480	0.131	-0.655*	-0.051	-0.756*	-0.616	0.373	0.141	-0.585	-0.341
酪氨酸SID Tyr	0.264	-0.651*	-0.033	-0.317	-0.305	-0.745*	-0.527	0.592	0.370	-0.269	-0.281
脯氨酸SID Pro	-0.064	-0.249	0.165	-0.553	-0.033	-0.580	-0.517	0.110	-0.006	-0.510	-0.273
半胱氨酸SID Cys	0.121	-0.376	0.103	-0.653*	-0.104	-0.803**	-0.644*	0.307	-0.123	-0.515	-0.206

Table 6

Table 7

Correlation analysis of corn essential amino acid and standardiezd ileal amino acid digestibility"

项目 Item	苏氨酸 Thr	缬氨酸 Val	异亮氨酸 Ile	亮氨酸 Leu	苯丙氨酸 Phe	赖氨酸 Lys	组氨酸 His	精氨酸 Arg	蛋氨酸 Met	色氨酸 Trp
苏氨酸SID Thr	-0.768**	-0.739*	-0.718*	-0.713*	-0.784**	-0.680*	-0.754*	-0.682*	-0.388	-0.250
甘氨酸SID Gly	-0.653*	-0.627	-0.595	-0.577	-0.667*	-0.567	-0.675*	-0.677*	-0.231	-0.175
缬氨酸SID Val	-0.696*	-0.669*	-0.639*	-0.630	-0.713*	-0.615	-0.699*	-0.696*	-0.378	-0.237
异亮氨酸SID Ile	-0.613	-0.593	-0.560	-0.547	-0.631	-0.523	-0.630	-0.691*	-0.414	-0.219
亮氨酸SID Leu	-0.663*	-0.638*	-0.605	-0.584	-0.676*	-0.544	-0.659*	-0.701*	-0.474	-0.237
苯丙氨酸SID Phe	-0.674*	-0.650*	-0.618	-0.608	-0.694*	-0.576	-0.686*	-0.734*	-0.451	-0.268
赖氨酸SID Lys	-0.713*	-0.700*	-0.668*	-0.645*	-0.720*	-0.594	-0.731*	-0.718*	-0.352	-0.163
组氨酸SID His	-0.522	-0.477	-0.459	-0.451	-0.545	-0.445	-0.545	-0.493	-0.025	-0.170
精氨酸SID Arg	-0.533	-0.503	-0.479	-0.468	-0.551	-0.506	-0.560	-0.530	-0.196	-0.199
蛋氨酸SID Met	-0.757*	-0.739*	-0.725*	-0.718*	-0.768**	-0.790**	-0.745*	-0.720*	-0.356	0.104
色氨酸SID Trp	-0.811**	-0.827**	-0.805**	-0.774**	-0.802**	-0.732*	-0.841**	-0.846**	-0.385	0.197
天冬氨酸SID Asp	-0.717*	-0.697*	-0.666*	-0.647*	-0.729*	-0.592	-0.736*	-0.728*	-0.331	-0.193
丝氨酸SID Ser	-0.690*	-0.658*	-0.631	-0.619	-0.702*	-0.565	-0.656*	-0.593	-0.398	-0.310
谷氨酸SID Glu	-0.681*	-0.655*	-0.622	-0.601	-0.695*	-0.581	-0.688*	-0.733*	-0.417	-0.181
丙氨酸SID Ala	-0.666*	-0.646*	-0.612	-0.590	-0.676*	-0.539	-0.658*	-0.708*	-0.547	-0.254
酪氨酸SID Tyr	-0.670*	-0.648*	-0.629	-0.586	-0.654*	-0.567	-0.620	-0.404	-0.232	-0.102
脯氨酸SID Pro	-0.569	-0.534	-0.500	-0.481	-0.589	-0.417	-0.603	-0.673*	-0.251	-0.234
半胱氨酸SID Cys	-0.774**	-0.739*	-0.726*	-0.724*	-0.792**	-0.746*	-0.761*	-0.696*	-0.268	-0.032

Table 7

Table 8

Table 9

Table 10

Chemical composition content of corn in different databases(dry matter basis) %"

项目 Item	中国 China^[26]	中国 China^[26]	中国 China^[26]	中国 China^[26]	荷兰 Netherlands^[27]	美国 USA^[28]	美国 USA^[28]	法国 France^[29]	最小值 Minimum	最大值 Maximum
干物质DM	86.00	86.00	86.00	86.00	86.30	88.31	87.93	86.30	86.00	88.31
粗蛋白CP	11.98	9.88	10.81	9.77	8.69	9.33	10.26	8.81	8.69	11.98
粗脂肪EE	4.53	6.16	4.30	3.95	4.40	3.94	5.52	4.17	3.94	6.16
粗纤维CF	2.67	3.02	2.56	2.67	2.78	2.24	2.52	2.67	2.24	3.02
粗灰分Ash	1.51	1.51	1.51	1.40	1.39	1.47	1.64	1.39	1.39	1.64
无氮浸出物NFE	65.30	65.42	66.81	68.21	69.03	—	—	—	65.30	69.03
中性洗涤纤维NDF	10.58	10.93	10.81	10.70	12.86	10.32	7.94	12.40	7.94	12.86
酸性洗涤纤维ADF	3.84	4.07	3.14	4.88	3.59	3.26	2.65	3.01	2.65	4.88
淀粉TS	71.74	68.60	76.05	73.84	69.06	70.83	76.70	73.93	68.60	76.70
总磷TP	0.42	0.29	0.38	0.37	0.29	0.29	0.31	0.29	0.29	0.42
有效磷AP	0.14	0.06	0.13	0.12	—	—	—	—	0.06	0.14
钙Ca	0.01	0.19	0.01	0.01	—	0.02	0.05	0.05	0.01	0.19
苏氨酸Thr	0.40	0.35	0.37	0.35	0.36	0.32	0.35	0.33	0.32	0.40
甘氨酸Gly	—	—	—	—	0.39	0.35	0.36	0.34	0.34	0.39
缬氨酸Val	0.51	0.53	0.47	0.42	0.48	0.43	0.50	0.44	0.42	0.53
异亮氨酸Ile	0.33	0.31	0.30	0.33	0.34	0.32	0.36	0.33	0.30	0.36
亮氨酸Leu	1.31	0.86	1.14	1.16	1.22	1.09	1.24	1.08	0.86	1.31
苯丙氨酸Phe	0.55	0.43	0.50	0.44	0.48	0.44	0.49	0.43	0.43	0.55
赖氨酸Lys	0.33	0.42	0.29	0.29	0.30	0.28	0.31	0.27	0.27	0.42
组氨酸His	0.29	0.34	0.26	0.28	0.30	0.39	0.30	0.26	0.26	0.39
精氨酸Arg	0.49	0.58	0.48	0.44	0.47	0.42	0.50	0.42	0.42	0.58
蛋氨酸Met	0.24	0.17	0.22	0.21	0.21	0.20	0.23	0.19	0.17	0.24
色氨酸Trp	0.10	0.09	0.08	0.07	0.07	0.07	0.08	0.06	0.06	0.10
天冬氨酸Asp	—	—	—	—	0.67	0.61	0.68	0.57	0.57	0.68
丝氨酸Ser	—	—	—	—	0.48	0.43	0.48	0.44	0.43	0.48
谷氨酸Glu	—	—	—	—	1.83	1.68	1.89	1.63	1.63	1.89
丙氨酸Ala	—	—	—	—	0.75	0.68	0.75	0.65	0.65	0.75
酪氨酸Tyr	0.43	0.33	0.41	0.37	0.38	0.29	0.32	0.37	0.29	0.43
脯氨酸Pro	—	—	—	—	0.90	0.80	0.88	0.82	0.80	0.90
半胱氨酸Cys	0.28	0.21	0.24	0.21	0.21	0.22	0.25	0.22	0.21	0.28

Table 10

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编号 Number	产地 Sources	编号 Number	产地 Sources
C1	宁夏	C6	内蒙古
C2	陕西	C7	美国
C3	吉林	C8	辽宁
C4	河南	C9	新疆
C5	吉林	C10	山东

项目 Item	甘氨酸 Gly	天冬氨酸 Asp	丝氨酸 Ser	谷氨酸 Glu	丙氨酸 Ala	酪氨酸 Tyr	脯氨酸 Pro	半胱氨酸 Cys
苏氨酸SID Thr	-0.796**	-0.747*	-0.753*	-0.748*	-0.732*	-0.803**	-0.565	-0.369
甘氨酸SID Gly	-0.692*	-0.652*	-0.639*	-0.623	-0.602	-0.651*	-0.613	-0.283
缬氨酸SID Val	-0.737*	-0.686*	-0.679*	-0.675*	-0.653*	-0.729*	-0.593	-0.402
异亮氨酸SID Ile	-0.672*	-0.606	-0.597	-0.598	-0.573	-0.645*	-0.608	-0.476
亮氨酸SID Leu	-0.724*	-0.663*	-0.638*	-0.640*	-0.614	-0.717*	-0.560	-0.483
苯丙氨酸SID Phe	-0.725*	-0.669*	-0.655*	-0.657*	-0.633*	-0.710*	-0.624	-0.475
赖氨酸SID Lys	-0.757*	-0.712*	-0.698*	-0.693*	-0.670*	-0.714*	-0.644*	-0.392
组氨酸SID His	-0.557	-0.483	-0.512	-0.482	-0.470	-0.509	-0.490	-0.072
精氨酸SID Arg	-0.570	-0.512	-0.519	-0.507	-0.489	-0.555	-0.518	-0.273
蛋氨酸SID Met	-0.794**	-0.762*	-0.749*	-0.755*	-0.736*	-0.802**	-0.582	-0.423
色氨酸SID Trp	-0.847**	-0.848**	-0.806**	-0.815**	-0.795**	-0.774**	-0.745*	-0.443
天冬氨酸SID Asp	-0.760*	-0.712*	-0.702*	-0.693*	-0.672*	-0.716*	-0.650*	-0.358
丝氨酸SID Ser	-0.728*	-0.671*	-0.669*	-0.661*	-0.642*	-0.749*	-0.445	-0.355
谷氨酸SID Glu	-0.739*	-0.686*	-0.658*	-0.655*	-0.631	-0.722*	-0.601	-0.439
丙氨酸SID Ala	-0.729*	-0.668*	-0.639*	-0.647*	-0.620	-0.730*	-0.553	-0.546
酪氨酸SID Tyr	-0.697*	-0.664*	-0.645*	-0.626	-0.611	-0.734*	-0.275	-0.184
脯氨酸SID Pro	-0.628	-0.557	-0.548	-0.531	-0.510	-0.561	-0.611	-0.282
半胱氨酸SID Cys	-0.805**	-0.754*	-0.765**	-0.756*	-0.742*	-0.799**	-0.578	-0.293

方程 Equations	相关系数 r	决定系数 R²	调整后决定系数 R_a²	P值 P-value
SID Thr=106.115-124.103Tyr	0.803	0.645	0.601	0.005
SID Gly=107.381-76.982Gly	0.692	0.478	0.413	0.027
SID Val=107.659-2.422NDF	0.743	0.552	0.496	0.014
SID Ile=111.419-2.74NDF	0.747	0.558	0.503	0.013
SID Leu=104.38-1.471NDF	0.744	0.554	0.498	0.014
SID Phe=137.237-8.92CF-54.756Arg-96.294Trp	0.981	0.962	0.944	＜0.001
SID Lys=114.103-3.815NDF	0.787	0.619	0.572	0.007
SID Met=111.208-2.473NDF	0.865	0.748	0.716	0.001
SID Trp=174.229-5.716NDF-38.895Pro	0.963	0.927	0.907	＜0.001
SID Asp=110.508-72.915Gly	0.760	0.578	0.525	0.011
SID Ser=103.575-79.149Tyr	0.749	0.561	0.506	0.013
SID Glu=101.734-163.03Gly+423.801Ile-44.434Glu	0.962	0.923	0.889	0.001
SID Ala=119.376-1.400NDF-67.429P	0.873	0.763	0.695	0.007
SID Tyr=105.278-1.863NDF	0.745	0.555	0.500	0.014
SID Pro=118.46-48.456Arg-7.039CF	0.845	0.715	0.633	0.012
SID Cys=120.502-115.078Gly	0.805	0.648	0.604	0.005

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Evaluation and Prediction Equation Construction of Standardized Ileal Amino Acid Digestibility of Corn from Different Sources in 28-day-old White-feathered Broilers

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组分 Ingredient	试验日粮 Experiment diet	无氮日粮 Nitrogen free diet
玉米Corn	91.58	—
玉米淀粉Corn starch	—	20.07
羧甲基纤维素Carboxymethylcellulose	—	5.00
葡萄糖Glucose	—	64.00
豆油Soybean oil	4.00	5.00
碳酸氢钠Sodium bicarbonate	—	0.75
磷酸二氢钙Monocalcium phosphate	1.90	1.90
石粉Limestone	1.30	1.30
氯化钾Potassium chloride	—	0.29
氯化钠Sodium chloride	0.30	—
氧化镁Magnesium oxide	—	0.20
碳酸钾Potassium carbonate	—	0.26
氯化胆碱Choline chloride	0.20	0.50
维生素预混料Vitamin premix¹	0.02	0.02
微量元素预混料Trace element premix²	0.20	0.20
抗氧化剂Antioxidant	—	0.01
二氧化钛Titanium dioxide	0.50	0.50
总计Total	100.00	100.00