【摘要】 试验选用５ 周龄石歧杂公鸡４５０ 只，随机分成５ 个组，每组９０ 只鸡，每组含３ 个重复，每重复３０ 只鸡；Ⅰ组为对照组，Ⅱ、Ⅲ、Ⅳ、Ⅴ为试验组，Ⅰ组给予自然光照，Ⅱ、Ⅲ、Ⅳ、Ⅴ组分别给予１２Ｌ：１２Ｄ、６Ｌ：６Ｄ、３Ｌ：３Ｄ：２Ｌ：２Ｄ的人工间歇光照。试验期鸡的基础日粮含代谢能１２．９３ ＭＪ／ｋｇ，ＣＰ１６．７８％ 。鸡只自由采食和饮水，记录统计每日采食量。从４０ 日龄开始，每隔２ 周称重，且从每重复中随机抽取３ 只鸡，采用闷杀法，用以测定机体能量含量。结果表明：（１）４１～８２ 日龄期间的平均耗料量试验各组高于对照组，其中第Ⅴ组最高，但在各时期的平均耗料量与对照组差异不显著（Ｐ＞ ０．０５）；（２）对照组在４０ 日龄、５４ 日龄、６８ 日龄和８２ 日龄的平均体重均小于试验各组，但差异不显著（Ｐ＞ ０．０５）。４１～８２ 日龄期间，对照组的平均增重显著低于试验各组（Ｐ＜ ０．０５），以第Ⅱ组最高。（３）试验各阶段对照组的平均料肉比均高于试验各组，４１～８２ 日龄的平均料肉比第Ⅱ组最低，显著低于对照组（Ｐ＜ ０．０５）。（４）在试验各时期，试验组（特别是第Ⅴ组）沉积总能、总能沉积率、食入代谢能沉积率都高于对照组。结果提示：人工?更多还原

【Abstract】 This work made use of 450 Shiqiza male chicks of five weeks age to study the influence of different lighting regime on performance and energy retention of diet. Chicks were chosen randomly and divided into two groups, Group I served as control group and group Ⅱ composed with lot Ⅱ,Ⅲ,Ⅳ and Ⅴ served as test group, both consumed feed ad libitum. Each lot of test group and control group were subdivided into three parts. Each part contained 30 chickens. The chickens from control group were provided with natural light and the test group an artificial light composed into four regimes: 12L:12D, 6L:6D, 3L:3D, 2L:2D in cycle. The experimental periods were from 41 to 82 days of age. The results showed that the different lighting regime could significantly affect the performance of the chicks and the energy retention of diet, particularly on the group Ⅱ was higher (P<0.05 and P<0.01).更多还原