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1、（一）蛋鸡的营养标准（NRC）。NRC标准和企业标准的主要区别是维生素的量的差别,考虑道饲料的保存期限，企业标准维生素的量大大高于NRC标准。1.生长鸡的营养标准。表6生长鸡的营养需要（NRC1998）白壳蛋鸡褐壳蛋鸡矮小型蛋鸡0-6周7-12周12-18周0-6周7-12周12-18周0-9周10-13周14-18周体重450g980g1375g500g1100g1500g500g750g1050g代谢能Kcal/kg285028502900280028002850285027002700粗蛋白质%18161517151418.516.516.0精氨酸%1.000.830.670.940.7
2、80.621.200.950.72赖氨酸%0.850.600.450.800.560.420.900.700.55蛋氨酸%0.300.250.200.280.230.190.400.340.34蛋+胱氨酸%0.620.520.420.590.490.390.750.600.45色氨酸%0.170.140.110.160.130.100.200.160.12苏氨酸%0.680.570.370.640.530.350.700.550.42亚油酸%1.001.001.001.001.001.000.60.50.5矿物质钙%0.900.800.800.900.800.801.00.900.75有效磷%
3、0.400.350.300.400.350.300.500.450.40氯%0.150.120.120.120.110.110.150.140.14镁mg/kg6005004005704703700.050.050.05钠%0.150.150.150.150.150.150.200.170.17钾%0.250.250.250.250.250.250.050.050.05铜mg/kg5.004.004.005.004.004.00432碘mg/kg0.350.350.350.330.330.330.80.60.6铁mg/kg806060755656403030锰mg/kg603030562828
4、403020硒mg/kg0.150.100.100.140.100.100.090.090.09锌mg/kg403535383333554040维生素AIU150015001500142014201420800060006000D3IU200200200190190190200020002000EIU10559.54.74.7201515Kmg/kg0.500.500.500.470.470.47433B12mg/kg0.0090.0030.0030.0090.0030.0030.0080.0060.006生物素mg/kg0.150.100.100.140.090.090.10.0750.07
5、5胆碱mg/kg13009005001225850470320240240叶酸mg/kg0.550.250.250.520.230.230.60.450.45烟酸mg/kg2711112610.310.3322424泛酸mg/kg10.010.010.09.49.49.4866吡哆醇mg/kg3.03.03.02.82.82.821.51.5核黄素mg/kg3.61.81.83.41.71.7433硫胺素mg/kg1.01.00.81.01.00.821.51.5注：矮小型蛋鸡营养标准为企业标准,下同。2.产蛋鸡的营养标准（NRC）表7蛋鸡产蛋期的营养需要（NRC1998）不同采食量的日粮营养
6、浓度每只每天需要量（mg或IU）矮小型蛋鸡采食量80100120100100g110g95g85g代谢能Kcal/kg29002900290029002900290027002750粗蛋白质%18.815.012.515000150001650016.717.0精氨酸%0.880.700.587007007700.700.88赖氨酸%0.860.690.586906907600.690.86蛋氨酸%0.380.300.253003003300.400.43蛋+胱氨酸%0.730.580.485805806450.650.78色氨酸%0.200.160.131601601750.160.20苏氨
7、酸%0.590.470.394704705200.470.59亚油酸%1.251.00.831000100011001.01.25矿物质钙%4.063.252.713250325036003.603.80有效磷%0.310.250.212502502750.250.31氯%0.160.130.111301301450.130.16镁mg625500420505055500625钠%0.190.150.131501501650.150.19钾%0.190.150.131501501650.150.19铜mg/kg?33碘mg/kg0.0440.0350.0290.0100.0040.0040.0
8、350.044铁mg/kg5645386.04.55.04556锰mg/kg2520172.02.02.22025硒mg/kg0.080.060.050.0060.0060.0060.060.08锌mg/kg4435294.53.53.93544维生素AIU/kg37503000250030030033045004750D3IU/kg375300250303033500600EIU/kg6541.00.50.55810Kmg/kg0.60.50.40.10.050.0550.81.0B12mg/kg0.0040.0040.0040.0080.00040.00040.0060.006生物素mg/kg0.130.100.080.010.010.0110.120.15胆碱mg/kg1310105087510510511510501310叶酸mg/kg0.310.250.210.0350.0250.0280.400.43烟酸mg/kg12.510.08.31.01.01.115.016.0泛酸mg/kg2.52.01.70.70.20.222.52.7吡哆醇mg/kg3.12.52.10.450.250.283.03.3核黄素mg/kg3.12.52.10.360.250.283.03.3硫胺素mg/kg0.880.700.600.070.070.081.01.0
