本试验旨在研究日粮不同苜蓿草粉添加水平对固始鸡体重、体尺指标和内脏器官发育的影响，探讨固始鸡对饲粮中苜蓿草粉的耐受水平。选取同批孵化的健康固始鸡慢羽纯系雏鸡1 152只，随机分为6组，每组设4个重复，每个重复48只，公母各占1/2，分别饲喂含0、5%、10%、15%、20%和25%苜蓿草粉的日粮，试验期8周。结果表明：在2、4、6及8周龄时试验组固始鸡体重、各肠段长度、大多数内脏器官重和器官指数、8周龄时体尺指标与对照组间差异均不显著（P>0.05）。试验结果表明，日粮中添加0～25%苜蓿草粉对1-8周龄固始鸡体重和体尺指标没有产生显著影响；对其大多数内脏器官发育没有产生显著影响。说明固始鸡对粗饲料有一定的耐受能力，其日粮中可以添加较高水平的苜蓿草粉。

This experiment was conducted to study the effects of alfalfa meal addition in diet on body weight, body measurements and internal organs development of Gushi chickens, and to find out alfalfa meal addition level that Gushi chickens could tolerate in diet. One thousand one hundred and fifty-two healthy Gushi chickens were selected and randomly assigned to six groups with four replicates in each group and forty-eight chickens (half male and half female) in each replicate. Six groups were fed diets with 0, 5%, 10%, 15%, 20% and 25% alfalfa meal, respectively. The experiment lasted for 8 weeks. The results showed that there were no significant effects on body weight, body measurements, length of duodenum, jejunum, ileum and cecum, weight and indices of most internal organs of Gushi chickens at 2, 4, 6, 8 weeks of age between control group and exprimental groups (P>0.05). These results indicated that there were no significant effects on body weight, body measurements and most internal organs development of Gushi chickens with alfalfa meal content from 0 to 25% in diets. Gushi chickens could tolerate certain level of crude fiber in diet, and higher level alfalfa meal could be added to the diet of Gushi chickens. ［Chinese Journal of Animal Nutrition, ２００9，２1（5）:784-791］