1 材料与方法
1.1 试验材料
1.2 试验设计和饲粮
表1 试验饲粮和无氮饲粮组成及营养水平(风干基础)Table 1 Composition and nutrient levels of experimental diet and nitrogen-free diet (air-dry basis) % |
| 项目 Items | 试验饲粮 Experimental diet | 无氮饲粮 Nitrogen-free diet | |||
|---|---|---|---|---|---|
| 原料Ingredients | |||||
| 玉米Corn | 92.53 | ||||
| 葡萄糖Glucose | 64.00 | ||||
| 玉米淀粉Corn starch | 22.16 | ||||
| 大豆油Soybean oil | 1.00 | 4.00 | |||
| 羧甲基纤维素钠Carboxymethylcellulose sodium | 2.00 | 4.00 | |||
| 碳酸氢钠NaHCO3 | 1.20 | ||||
| 石粉Limestone | 1.30 | 1.30 | |||
| 磷酸氢钙CaHPO4 | 1.90 | 1.90 | |||
| 氯化钠NaCl | 0.30 | ||||
| 氯化钾KCl | 0.40 | ||||
| 氧化镁MgO | 0.07 | ||||
| 氯化胆碱Choline chloride (50%) | 0.25 | 0.25 | |||
| 维生素预混料Vitamin premix1) | 0.02 | 0.02 | |||
| 微量元素预混料Mineral premix2) | 0.20 | 0.20 | |||
| 二氧化钛TiO2 | 0.50 | 0.50 | |||
| 合计Total | 100.00 | 100.00 | |||
| 营养水平Nutrient levels3) | |||||
| 代谢能ME/(MJ/kg) | 12.58 | 12.89 | |||
| 粗蛋白质CP | 7.49(6.73~8.85) | 0.26 | |||
| 钙Ca | 0.94(0.91~1.02) | 0.90 | |||
| 总磷TP | 0.58(0.51~0.63) | 0.44 |
1)维生素预混料为每千克饲粮提供 Vitamin premix provided the following per kilogram of diets:VA 12 000 IU,VD3 2 500 IU,VE 20 IU,VK3 1.3 mg,VB1 2.2 mg,VB2 8 mg,VB6 4 mg,VB12 0.013 mg,烟酸 nicotinic acid 40 mg,D-泛酸 D-pantothenic acid 10 mg,生物素 biotin 0.04 mg,叶酸 folic acid 1 mg。 2)微量元素预混料为每千克饲粮提供 Mineral premix provided the following per kilogram of diets:Fe 80 mg,Cu 8 mg,Mn 110 mg,Zn 65 mg,I 1.1 mg,Se 0.3 mg。 3)营养水平中代谢能依据《中国饲料成分及营养价值表(2019年第30版)》中各原料对应数值进行计算,粗蛋白质、钙和总磷为实测值。In the nutrient levels, ME was calculated according to the corresponding values of each raw material in Tables of Feed Composition and Nutritive Values in China (thirty edition, 2019), while CP, Ca and TP were measured values. |
1.3 样品采集
1.4 指标测定
1.5 计算公式
1.6 数据统计分析
2 结果与分析
2.1 育成期蛋鸡IEAA
表2 育成期蛋鸡采食无氮饲粮后回肠内源性氨基酸损失量Table 2 IEAA in layer chickens after feeding nitrogen-free diet during growing period mg/kg DMI |
| 项目 Items | 回肠内源性氨基酸损失量 IEAA |
|---|---|
| 必需氨基酸EAA | |
| 赖氨酸Lys | 712.08 |
| 蛋氨酸Met | 256.31 |
| 苏氨酸Thr | 1 047.87 |
| 色氨酸Trp | 238.36 |
| 异亮氨酸Ile | 581.49 |
| 亮氨酸Leu | 980.56 |
| 苯丙氨酸Phe | 522.82 |
| 缬氨酸Val | 857.68 |
| 组氨酸His | 274.79 |
| 精氨酸Arg | 707.33 |
| 非必需氨基酸NEAA | |
| 甘氨酸Gly | 791.90 |
| 天冬氨酸Asp | 1 324.14 |
| 丝氨酸Ser | 1 099.16 |
| 谷氨酸Glu | 1 746.03 |
| 丙氨酸Ala | 679.30 |
| 半胱氨酸Cys | 505.38 |
| 酪氨酸Tyr | 490.08 |
| 脯氨酸Pro | 805.90 |
2.2 育成期蛋鸡对不同产地玉米氨基酸AID和SID
表3 育成期蛋鸡对不同玉米试验饲粮CP和氨基酸AIDTable 3 AID of CP and amino acids of different corn experimental diets in layer chickens during growing period % |
| 项目 Items | 组别Groups | 平均值 Mean | 最小值 Min | 最大值 Max | 均值标准误 SEM | P值 P-value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 | ||||||
| 粗蛋白质CP | 67.76abcd | 66.97abcd | 71.90a | 66.09bcd | 62.74d | 70.13abc | 63.99cd | 65.81bcd | 65.90bcd | 70.06ab | 67.12 | 62.74 | 71.90 | 0.61 | <0.001 |
| 必需氨基酸EAA | |||||||||||||||
| 赖氨酸Lys | 62.10 | 58.25 | 63.86 | 62.79 | 53.85 | 59.71 | 57.99 | 59.38 | 60.32 | 61.59 | 60.05 | 53.85 | 63.86 | 1.05 | 0.668 |
| 蛋氨酸Met | 82.55abc | 86.31ab | 88.43a | 84.85abc | 79.33c | 84.04abc | 81.00bc | 83.01abc | 81.73bc | 87.00ab | 84.12 | 79.33 | 88.43 | 0.64 | 0.022 |
| 苏氨酸Thr | 55.90 | 49.76 | 59.26 | 55.39 | 50.09 | 58.59 | 47.71 | 54.09 | 53.39 | 57.38 | 54.45 | 47.71 | 59.26 | 0.95 | 0.098 |
| 色氨酸Trp | 57.49ab | 58.37ab | 62.16a | 56.07ab | 44.31c | 52.51b | 59.35ab | 63.58a | 55.38ab | 60.21ab | 56.90 | 44.31 | 63.58 | 1.03 | <0.001 |
| 异亮氨酸Ile | 76.62 | 73.05 | 78.68 | 76.42 | 71.96 | 76.87 | 69.84 | 74.60 | 76.98 | 77.74 | 75.46 | 69.84 | 78.68 | 0.71 | 0.165 |
| 亮氨酸Leu | 85.49 | 82.44 | 86.72 | 84.75 | 83.13 | 86.86 | 81.52 | 84.87 | 85.62 | 85.62 | 84.81 | 81.52 | 86.86 | 0.42 | 0.070 |
| 苯丙氨酸Phe | 81.70 | 78.28 | 83.48 | 81.32 | 78.08 | 83.04 | 76.85 | 80.54 | 81.88 | 81.74 | 80.82 | 76.85 | 83.48 | 0.53 | 0.087 |
| 缬氨酸Val | 74.35ab | 70.32abc | 76.05a | 75.09ab | 69.07bc | 74.47ab | 68.10c | 73.56abc | 74.03ab | 75.65a | 73.24 | 68.10 | 76.05 | 0.64 | 0.045 |
| 组氨酸His | 79.88a | 75.12ab | 79.55a | 78.85ab | 74.16b | 77.91ab | 75.67ab | 77.54ab | 80.00a | 79.73a | 77.92 | 74.16 | 80.00 | 0.51 | 0.046 |
| 精氨酸Arg | 77.22 | 77.57 | 81.80 | 79.28 | 73.00 | 77.35 | 73.20 | 78.13 | 78.55 | 78.83 | 77.64 | 73.00 | 81.80 | 0.66 | 0.127 |
| 非必需氨基酸NEAA | |||||||||||||||
| 甘氨酸Gly | 63.75abc | 60.65abc | 67.32a | 64.80ab | 56.20c | 62.07abc | 57.20bc | 63.02abc | 61.47abc | 66.08a | 62.43 | 56.20 | 67.32 | 0.82 | 0.034 |
| 天冬氨酸Asp | 68.07 | 62.79 | 69.82 | 67.56 | 62.86 | 71.10 | 62.57 | 69.19 | 66.81 | 68.55 | 67.08 | 62.57 | 71.10 | 0.73 | 0.052 |
| 丝氨酸Ser | 67.40abc | 62.31bcd | 71.28a | 67.40abc | 61.64cd | 70.52ab | 56.42d | 66.53abc | 64.88abc | 67.56abc | 65.91 | 56.42 | 71.28 | 0.90 | 0.013 |
| 谷氨酸Glu | 83.90 | 81.40 | 85.14 | 83.74 | 81.34 | 85.45 | 80.05 | 83.57 | 83.90 | 84.11 | 83.37 | 80.05 | 85.45 | 0.41 | 0.087 |
| 丙氨酸Ala | 82.43 | 78.91 | 83.81 | 81.84 | 79.49 | 84.83 | 79.44 | 82.60 | 82.47 | 83.04 | 81.97 | 78.91 | 84.83 | 0.47 | 0.054 |
| 半胱氨酸Cys | 64.37ab | 63.98ab | 67.76a | 63.69ab | 59.11bc | 65.24ab | 52.13d | 61.86abc | 56.00cd | 65.67ab | 62.40 | 52.13 | 67.76 | 0.86 | <0.001 |
| 酪氨酸Tyr | 74.15 | 71.02 | 75.46 | 73.28 | 72.63 | 76.51 | 67.33 | 75.04 | 73.54 | 76.03 | 73.71 | 67.33 | 76.51 | 0.62 | 0.088 |
| 脯氨酸Pro | 78.78ab | 74.53c | 80.52ab | 79.07ab | 76.07bc | 83.15a | 73.16c | 79.92ab | 79.57ab | 80.73a | 78.64 | 73.16 | 83.15 | 0.55 | <0.001 |
| 总氨基酸TAA | 77.28 | 73.42 | 78.83 | 76.58 | 72.72 | 78.06 | 71.32 | 76.19 | 76.17 | 77.41 | 75.95 | 71.32 | 78.83 | 0.55 | 0.397 |
表4 育成期蛋鸡对不同玉米试验饲粮CP和氨基酸SIDTable 4 SID of CP and amino acids of different corn experimental diets in layer chickens during growing period % |
| 项目 Items | 组别Groups | 平均值 Mean | 最小值 Min | 最大值 Max | 均值标准误 SEM | P值 P-value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 | ||||||
| 粗蛋白质CP | 94.97 | 92.50 | 94.13 | 93.77 | 88.52 | 94.66 | 88.52 | 93.89 | 91.76 | 96.82 | 92.88 | 88.52 | 96.82 | 0.58 | 0.112 |
| 必需氨基酸EAA | |||||||||||||||
| 赖氨酸Lys | 92.84 | 83.80 | 85.38 | 91.07 | 80.45 | 84.59 | 90.16 | 85.34 | 84.72 | 89.02 | 87.27 | 80.45 | 92.84 | 0.99 | 0.314 |
| 蛋氨酸Met | 95.67 | 97.43 | 97.25 | 97.41 | 95.30 | 97.44 | 91.81 | 96.35 | 98.18 | 97.73 | 97.10 | 91.81 | 98.18 | 0.60 | 0.277 |
| 苏氨酸Thr | 91.43 | 82.39 | 89.44 | 90.37 | 82.25 | 89.76 | 86.90 | 92.30 | 84.31 | 91.53 | 88.67 | 82.25 | 92.30 | 0.92 | 0.156 |
| 色氨酸Trp | 94.24 | 91.06 | 93.54 | 93.75 | 90.61 | 92.95 | 84.46 | 95.52 | 92.73 | 96.46 | 93.06 | 84.46 | 96.46 | 0.72 | 0.094 |
| 异亮氨酸Ile | 97.43 | 94.81 | 96.02 | 97.24 | 95.26 | 96.92 | 98.79 | 98.60 | 94.24 | 98.48 | 96.70 | 94.24 | 98.79 | 0.64 | 0.846 |
| 亮氨酸Leu | 96.05 | 92.44 | 94.38 | 95.52 | 94.09 | 95.35 | 95.06 | 96.17 | 94.26 | 95.77 | 94.86 | 92.44 | 96.17 | 0.37 | 0.411 |
| 苯丙氨酸Phe | 97.41 | 92.53 | 94.53 | 96.57 | 94.28 | 95.48 | 95.71 | 95.61 | 94.58 | 96.79 | 95.30 | 92.53 | 97.41 | 0.46 | 0.374 |
| 缬氨酸Val | 96.14 | 91.76 | 93.98 | 97.60 | 94.26 | 95.00 | 96.23 | 96.98 | 93.58 | 98.00 | 95.39 | 91.76 | 98.00 | 0.57 | 0.146 |
| 组氨酸His | 91.58 | 86.54 | 90.48 | 91.20 | 87.60 | 88.76 | 90.18 | 91.47 | 89.95 | 92.52 | 90.05 | 86.54 | 92.52 | 0.49 | 0.088 |
| 精氨酸Arg | 97.48 | 94.76 | 97.46 | 98.82 | 93.73 | 96.94 | 92.03 | 98.45 | 94.19 | 98.40 | 96.17 | 92.03 | 98.82 | 0.59 | 0.251 |
| 非必需氨基酸NEAA | |||||||||||||||
| 甘氨酸Gly | 90.27 | 83.60 | 88.37 | 90.11 | 85.19 | 87.04 | 88.29 | 92.03 | 84.42 | 91.86 | 88.02 | 83.60 | 92.03 | 0.75 | 0.051 |
| 天冬氨酸Asp | 94.65 | 86.58 | 91.58 | 93.21 | 86.79 | 92.28 | 93.72 | 93.29 | 90.03 | 93.90 | 91.77 | 86.58 | 94.65 | 0.68 | 0.162 |
| 丝氨酸Ser | 92.12 | 88.72 | 94.14 | 95.42 | 87.67 | 95.16 | 91.78 | 97.06 | 89.64 | 95.64 | 93.04 | 87.67 | 97.06 | 0.84 | 0.298 |
| 谷氨酸Glu | 96.04 | 92.56 | 94.30 | 95.82 | 94.05 | 95.57 | 95.60 | 95.71 | 94.16 | 95.75 | 94.89 | 92.56 | 96.04 | 0.37 | 0.412 |
| 丙氨酸Ala | 94.42 | 89.76 | 92.33 | 93.58 | 91.67 | 94.28 | 94.35 | 94.74 | 92.27 | 94.50 | 93.09 | 89.76 | 94.74 | 0.43 | 0.104 |
| 半胱氨酸Cys | 89.23abc | 87.23abcd | 90.41abc | 88.63abcd | 86.07bcd | 92.29ab | 84.49d | 90.89abc | 85.75cd | 92.51a | 88.59 | 84.49 | 92.51 | 0.66 | 0.023 |
| 酪氨酸Tyr | 96.61 | 90.63 | 93.02 | 95.58 | 93.28 | 93.85 | 94.92 | 95.77 | 92.94 | 96.75 | 94.22 | 90.63 | 96.75 | 0.58 | 0.281 |
| 脯氨酸Pro | 91.23ab | 87.17b | 91.09ab | 91.84a | 89.70ab | 93.80a | 90.03ab | 93.56a | 90.41ab | 94.26a | 91.29 | 87.17 | 94.26 | 0.49 | 0.022 |
| 总氨基酸TAA | 92.90 | 90.17 | 92.82 | 93.71 | 89.48 | 93.49 | 86.38 | 93.75 | 91.54 | 94.46 | 91.87 | 86.38 | 94.46 | 0.73 | 0.230 |
2.3 相关性分析
表5 玉米物理特性和常规营养成分含量与育成期蛋鸡氨基酸SID相关性分析(干物质基础)Table 5 Correlation analysis between corn physical characteristics and conventional nutrient contents with amino acid SID in layer chickens during growing period (DM basis) |
| 项目 Items | 干物质 DM | 粗蛋 白质 CP | 粗脂肪 EE | 粗灰分 Ash | 中性洗 涤纤维 NDF | 酸性洗 涤纤维 ADF | 总磷 TP | 钙 Ca | 总能 GE | 总淀粉 TS | 容重 Bulk density | 千粒容积 Thousand- grain volume | 千粒重 Thousand- grain weight |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 赖氨酸SID Lys SID | -0.011 | -0.303 | -0.181 | -0.276 | -0.070 | 0.097 | -0.004 | 0.088 | 0.327 | -0.235 | 0.026 | -0.186 | -0.102 |
| 蛋氨酸SID Met SID | -0.095 | 0.619 | 0.103 | 0.328 | -0.012 | 0.398 | 0.137 | 0.143 | 0.177 | -0.546 | -0.043 | -0.157 | -0.116 |
| 苏氨酸SID Thr SID | -0.152 | -0.245 | -0.007 | -0.486 | -0.246 | -0.256 | -0.212 | -0.197 | 0.156 | -0.593 | 0.125 | 0.153 | 0.199 |
| 色氨酸SID Trp SID | -0.052 | 0.179 | 0.075 | -0.085 | -0.327 | 0.011 | -0.262 | -0.120 | 0.084 | -0.670* | -0.012 | 0.041 | 0.066 |
| 异亮氨酸SID Ile SID | -0.244 | -0.719* | -0.020 | -0.812** | -0.330 | -0.522 | -0.354 | 0.033 | 0.017 | -0.340 | 0.136 | 0.087 | 0.115 |
| 亮氨酸SID Leu SID | -0.331 | -0.528 | -0.189 | -0.479 | -0.552 | -0.234 | -0.406 | -0.378 | 0.117 | -0.466 | 0.465 | 0.323 | 0.468 |
| 苯丙氨酸SID Phe SID | -0.286 | -0.475 | -0.124 | -0.361 | -0.478 | -0.102 | -0.247 | -0.240 | 0.254 | -0.468 | 0.407 | 0.157 | 0.333 |
| 缬氨酸SID Val SID | -0.297 | -0.660* | -0.225 | -0.634* | -0.580 | -0.215 | -0.382 | -0.054 | 0.304 | -0.596 | 0.307 | 0.130 | 0.276 |
| 组氨酸SID His SID | -0.015 | -0.363 | -0.188 | -0.307 | -0.261 | 0.037 | -0.422 | -0.271 | 0.110 | -0.629 | 0.153 | 0.367 | 0.407 |
| 精氨酸SID Arg SID | -0.024 | 0.091 | 0.010 | -0.323 | -0.264 | -0.117 | -0.070 | -0.024 | 0.354 | -0.697* | -0.104 | -0.111 | -0.070 |
| 甘氨酸SID Gly SID | -0.045 | -0.523 | -0.095 | -0.663* | -0.376 | -0.361 | -0.420 | -0.144 | 0.141 | -0.573 | 0.027 | 0.176 | 0.193 |
| 天冬氨酸SID Asp SID | -0.213 | -0.380 | -0.104 | -0.401 | -0.193 | -0.104 | -0.203 | -0.200 | 0.125 | -0.448 | 0.277 | 0.215 | 0.299 |
| 丝氨酸SID Ser SID | -0.241 | -0.177 | -0.044 | -0.533 | -0.209 | -0.219 | -0.136 | -0.034 | 0.227 | -0.690* | 0.114 | 0.111 | 0.158 |
| 谷氨酸SID Glu SID | -0.391 | -0.536 | -0.171 | -0.476 | -0.496 | -0.205 | -0.257 | -0.271 | 0.216 | -0.431 | 0.494 | 0.224 | 0.402 |
| 丙氨酸SID Ala SID | -0.435 | -0.563 | -0.104 | -0.500 | -0.454 | -0.264 | -0.360 | -0.302 | 0.018 | -0.421 | 0.525 | 0.342 | 0.481 |
| 半胱氨酸SID Cys SID | -0.274 | 0.104 | 0.434 | -0.348 | -0.160 | -0.375 | -0.037 | 0.012 | 0.012 | -0.702* | 0.033 | 0.012 | 0.022 |
| 酪氨酸SID Tyr SID | -0.244 | -0.646* | -0.154 | -0.537 | -0.570 | -0.240 | -0.458 | -0.225 | 0.142 | -0.486 | 0.338 | 0.216 | 0.344 |
| 脯氨酸SID Pro SID | -0.512 | -0.275 | 0.086 | -0.402 | -0.470 | -0.231 | -0.298 | -0.226 | 0.051 | -0.755* | 0.489 | 0.349 | 0.483 |
表6 玉米中氨基酸含量与育成期蛋鸡氨基酸SID相关性分析(干物质基础)Table 6 Correlation analysis between amino acid contents in corn and amino acid SID in laying chickens during growing period (DM basis) |
| 项目 Items | 蛋氨酸 Met | 色氨酸 Trp | 苏氨酸 Thr | 苯丙 氨酸 Phe | 赖氨酸 Lys | 组氨酸 His | 精氨酸 Arg | 缬氨酸 Val | 异亮 氨酸 Ile | 亮氨酸 Leu | 天冬 氨酸 Asp | 丝氨酸 Ser | 谷氨酸 Glu | 甘氨酸 Gly | 丙氨酸 Ala | 半胱 氨酸 Cys | 酪氨酸 Tyr | 脯氨酸 Pro |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 赖氨酸SID Lys SID | -0.099 | -0.475 | -0.101 | -0.366 | -0.221 | 0.127 | -0.139 | -0.205 | -0.401 | -0.613 | -0.192 | -0.132 | -0.294 | -0.266 | -0.216 | -0.064 | -0.190 | -0.197 |
| 蛋氨酸SID Met SID | 0.380 | 0.762* | 0.508 | 0.570 | 0.393 | 0.471 | 0.536 | 0.409 | 0.474 | 0.573 | 0.487 | 0.545 | 0.807** | 0.535 | 0.539 | 0.310 | 0.208 | 0.654* |
| 苏氨酸SID Thr SID | -0.455 | -0.307 | 0.072 | -0.155 | 0.001 | 0.082 | -0.054 | -0.241 | -0.542 | -0.331 | 0.226 | 0.204 | -0.119 | -0.250 | 0.150 | -0.437 | -0.005 | 0.139 |
| 色氨酸SID Trp SID | -0.010 | 0.331 | 0.325 | 0.205 | 0.144 | 0.333 | 0.252 | 0.028 | -0.073 | 0.101 | 0.378 | 0.408 | 0.487 | 0.177 | 0.393 | -0.024 | 0.140 | 0.429 |
| 异亮氨酸SID Ile SID | -0.771** | -0.779** | -0.451 | -0.643* | -0.409 | -0.392 | -0.547 | -0.646* | -0.868** | -0.701* | -0.289 | -0.340 | -0.690* | -0.699* | -0.373 | -0.666* | -0.355 | -0.360 |
| 亮氨酸SID Leu SID | -0.532 | -0.463 | -0.212 | -0.367 | -0.351 | -0.148 | -0.387 | -0.470 | -0.721* | -0.463 | -0.074 | -0.103 | -0.333 | -0.535 | -0.136 | -0.360 | -0.022 | 0.014 |
| 苯丙氨酸SID Phe SID | -0.327 | -0.498 | -0.172 | -0.364 | -0.416 | -0.004 | -0.340 | -0.386 | -0.637* | -0.560 | -0.147 | -0.128 | -0.298 | -0.479 | -0.166 | -0.202 | -0.092 | -0.010 |
| 缬氨酸SID Val SID | -0.670* | -0.648* | -0.423 | -0.576 | -0.476 | -0.326 | -0.543 | -0.611 | -0.780** | -0.652* | -0.341 | -0.355 | -0.541 | -0.603 | -0.390 | -0.505 | -0.336 | -0.245 |
| 组氨酸SID His SID | -0.329 | -0.322 | 0.010 | -0.299 | -0.152 | 0.154 | -0.104 | -0.223 | -0.528 | -0.505 | -0.012 | 0.026 | -0.195 | -0.265 | -0.060 | -0.182 | 0.133 | -0.019 |
| 精氨酸SID Arg SID | -0.258 | 0.034 | 0.241 | 0.099 | 0.210 | 0.187 | 0.177 | -0.067 | -0.209 | -0.055 | 0.365 | 0.360 | 0.241 | 0.111 | 0.331 | -0.353 | -0.097 | 0.275 |
| 甘氨酸SID Gly SID | -0.645* | -0.564 | -0.185 | -0.457 | -0.210 | -0.134 | -0.297 | -0.476 | -0.739* | -0.619 | -0.070 | -0.092 | -0.404 | -0.425 | -0.144 | -0.577 | -0.184 | -0.197 |
| 天冬氨酸SID Asp SID | -0.376 | -0.437 | -0.052 | -0.292 | -0.174 | 0.060 | -0.176 | -0.266 | -0.582 | -0.469 | 0.018 | 0.022 | -0.293 | -0.395 | -0.051 | -0.269 | 0.031 | 0.025 |
| 丝氨酸SID Ser SID | -0.580 | -0.220 | 0.022 | -0.101 | 0.101 | -0.066 | -0.056 | -0.235 | -0.452 | -0.153 | 0.233 | 0.186 | -0.126 | -0.201 | 0.139 | -0.560 | -0.095 | 0.165 |
| 谷氨酸SID Glu SID | -0.517 | -0.544 | -0.261 | -0.386 | -0.389 | -0.181 | -0.427 | -0.465 | -0.705* | -0.488 | -0.137 | -0.162 | -0.408 | -0.569 | -0.194 | -0.365 | -0.116 | -0.018 |
| 丙氨酸SID Ala SID | -0.549 | -0.500 | -0.253 | -0.389 | -0.387 | -0.180 | -0.425 | -0.470 | -0.742* | -0.451 | -0.102 | -0.135 | -0.407 | -0.621 | -0.169 | -0.358 | -0.012 | 0.021 |
| 半胱氨酸SID Cys SID | -0.261 | 0.091 | 0.298 | 0.207 | 0.163 | 0.223 | 0.179 | -0.029 | -0.251 | 0.100 | 0.507 | 0.478 | 0.294 | -0.016 | 0.488 | -0.373 | 0.019 | 0.488 |
| 酪氨酸SID Tyr SID | -0.514 | -0.605 | -0.318 | -0.538 | -0.503 | -0.159 | -0.476 | -0.556 | -0.793** | -0.686* | -0.267 | -0.263 | -0.444 | -0.600 | -0.301 | -0.345 | -0.164 | -0.176 |
| 脯氨酸SID Pro SID | -0.491 | -0.145 | -0.022 | -0.079 | -0.180 | -0.042 | -0.198 | -0.292 | -0.531 | -0.099 | 0.176 | 0.141 | -0.045 | -0.376 | 0.134 | -0.363 | 0.061 | 0.354 |
2.4 基于玉米物理特性、常规营养成分及氨基酸含量构建育成期蛋鸡氨基酸SID预测方程
表7 基于玉米理化特性、常规营养成分和氨基酸含量构建育成期蛋鸡氨基酸SID预测方程(干物质基础)Table 7 Prediction equations for amino acid SID based on physical characteristics and contents of conventional nutrients and amino acids in corn in layer chickens during growing period (DM basis) |
| 预测方程Prediction equations | 决定系数R2 | P值P-value |
|---|---|---|
| Lys SID=63.964-41.871Leu+34.101Pro+0.925GE+2.172NDF | 0.821 | 0.041 |
| Met SID=90.204+242.635Trp-0.139TS-4.267Ash+0.228GE | 0.920 | 0.006 |
| Thr SID=89.847-0.170TS-256.857Ile+8.952CP-1.544EE | 0.932 | 0.004 |
| Trp SID=129.899-0.493TS | 0.449 | 0.034 |
| Ile SID=92.182-56.110Ile+0.279GE+1.345NDF | 0.928 | <0.001 |
| Leu SID=95.996-63.255Ile+22.800Phe+1.016ADF+0.129GE | 0.956 | 0.001 |
| Phe SID=78.891-43.076Ile+36.446His+0.439GE+0.009BD | 0.975 | <0.001 |
| Val SID=109.363-41.932Ile-0.153TS+0.367GE | 0.923 | <0.001 |
| His SID=113.194-0.203TS-2.448CP+41.571Thr | 0.750 | 0.031 |
| Arg SID=123.619-0.361TS | 0.486 | 0.025 |
| Gly SID=77.619-221.494Ile+100.644Gly+2.092ADF+2.789CP | 0.968 | <0.001 |
| Asp SID=95.459-160.113Ile+71.375Val+2.490ADF | 0.790 | 0.019 |
| Ser SID=131.337-0.418TS-38.636Met | 0.662 | 0.022 |
| Glu SID=98.409-79.227Trp+0.011BD-0.099TS | 0.725 | 0.041 |
| Ala SID=159.925-2.575CP+44.017Thr-0.675DM | 0.734 | 0.037 |
| Cys SID=120.630-0.457TS-3.210ADF+157.341Trp | 0.835 | 0.009 |
| Tyr SID=122.367-1.362CP-0.205TS | 0.651 | 0.025 |
| Pro SID=102.948-0.347TS+0.021BD-1.288ADF | 0.856 | 0.006 |
SID:标准回肠消化率 standardized ileal digestibility;Lys:赖氨酸 lysine;Met:蛋氨酸 methionine;Thr:苏氨酸 threonine;Trp:色氨酸 tryptophan;Ile:异亮氨酸 isoleucine;Leu:亮氨酸 leucine;Phe:苯丙氨酸 phenylalanine;Val:缬氨酸 valine;His:组氨酸 histidine;Arg:精氨酸 arginine;Gly:甘氨酸 glycine;Asp:天冬氨酸 aspartic acid;Ser:丝氨酸 serine;Glu:谷氨酸 glutamic acid;Ala:丙氨酸 alanine;Cys:半胱氨酸 cysteine;Tyr:酪氨酸 tyrosine;Pro:脯氨酸 proline;GE:总能 gross energy;CP:粗蛋白质 crude protein;EE:粗脂肪 ether extract;Ash:粗灰分 crude ash;NDF:中性洗涤纤维 neutral detergent fiber;ADF:酸性洗涤纤维 acid detergent fiber;TS:总淀粉 total starch;DM:干物质 dry matter;BD:容重 bulk density。 |

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