不同季节蛋鸡饲料养分浓度的研究Ⅱ.高温期罗曼蛋鸡日粮的优化研究

Studies on Nutrient Concentration in Diets for Laying hens at Different Seasons Ⅱ. Study on Optimization of Diets for Loman Laying hens at High Temperature

在高温夏季（１９９３年７月１日～９月３０日，合肥地区，开放式鸡舍，舍温２７．９～３８．７℃，平均３２．３℃），用６种不同配方的日粮饲喂处于相同生境的６组２３～３６周龄罗曼蛋鸡。按罗曼公司推荐的饲养标准配制第１组日粮；对第２～６组日粮养分浓度作适当调整。饲养结果表明：各组间罗曼蛋鸡产蛋率、饲料转化率和产蛋饲料成本有显著（Ｐ＜０．０５）或极显著（Ｐ＜０．０１）差异。其中，第５组鸡产蛋率（８３．９３％）和饲料转化率（４３．６４％）均为最高（Ｐ＜０．０１），比第１组鸡产蛋率（７８．９１％）和饲料转化率（４１．２６％）分别提高６．３６％（Ｐ＜０．０５）和５．７７％（Ｐ＜０．０５）；第５组鸡产蛋饲料成本（２．５５元／ｋｇ）比第１组鸡产蛋饲料成本（２．９２元／ｋｇ）降低１４．５１％（Ｐ＜０．０１）。第５组日粮配方（％）为：玉米６１．０、小麦麸３．０、大豆粕１７．０、鱼粉４．０、菜籽饼４．３、蛋氨酸０．１４、赖氨酸０．０５、骨粉０．８、石粉８．５、磷酸氢钙０．８、食盐０．３１、禽用微量元素添加剂０．１２、罗曼多维素０．０１８。

During the high temperature in summer season(July l,1993 ￣ Sept.30, 1993, Hefei,air temperature of open side poultry house: 27.9￣38.7℃, mean: 32.3℃), 6 groups of Loman laying hens (23￣36 weeks old ) in same ecological environment were fed with 6 diets of various formulas. The diet I was made according to the feed standard recommended by Loman company. Some proper adjustments for nutrient concentrations were made in diets Ⅱ～Ⅵ. Feeding results showed that there were significant (p<0.05) or great significant (p<0.01) differences between various groups of hens in laying rate, feed conversion efficiency and feed cost. Laying rate (83.93%) and feed conversion efficiency (43.64%) of the fifth group hens were the highest (p<0.01), and increased by 6.36% (p<0.05) and 5.77% (p<0.05), respectively, as compared with the first group (laying rate: 78 91%; feed conversion efficiency: 41.26%). Feed cost of the fifth group (2.55 yuan/kg) decreased by 14.51% (p<0.01), as compared with the first group (2.92 yuan/kg). Formula (%)of the fifth group diet: corn 61.0, wheat bran 3.0, soybean cake 17.0, fish meal 4.0, rapeseed cake 4.3, methionine 0.14, lysine 0.05, bone meal 0.8, lime stone meal 8.5, dicalcium phosphate 0.8, common salt 0.31, trace element premix 0.12, Loman vitamin premix 0.08.