摘要
选取4.5月龄的五龙鹅32只进行试验,试验分为4个组,1个对照组,3个处理组,每组8个重复,对照组饲喂基础日粮,处理组饲喂基础日粮与青绿冬牧-70黑麦草重量的比例分别为1∶2、1∶3、1∶4(CF占日粮干物质的量分别为9.14%、17.92%、20.40%、22.27%),试验采用全收粪法,连续收集正试期4d排泄物,分析饲料及排泄物中的CF、NDF、ADF、AA、N、Ca、P等的含量。试验结果表明:在能量和CP摄入量一致的条件下,随着日粮粗纤维含量的提高,CF、NDF、ADF消化率逐渐提高;净蛋白利用率处理组间逐渐升高;除蛋氨酸(Met)和胱氨酸(Cys)外,其余氨基酸消化率(AAAD)变化不大;但降低Ca的吸收率,增加P的吸收率。
Thirty two Wulong geese were selected and divided into 4 groups randomly, 8 geese in every groups at 4.5 months of age. One group was set as control and the other three were treatment groups. Control group was fed basal diet, while the treatment groups were fed basic diet and dongmu-70 ryegrass respectively, and the weight ratio of basal diet and ryegrass were 1∶2, 1∶3 and 1∶4(containing 9.14%, 17.92%, 20.40%, 22.27% crude fiber at the ration dry matter weight level). Adopting total excreta method to collect the 4-day excreta of each goose. The contents of crude fiber (CF), neutral detergent fiber (NDF), acid detergent fiber (ADF), amino acid, N, Ca and P of the diet and the excreta were examined. The result suggested that, under feeding respectively the isocaloric and the same content of CP, the metabolizablility of CF, the digestibilities of NDF and ADF increased significantly as dietary CF was increased. The NPU increased among treatment groups. The digestion of amino acid has no remarkable diversity except Met and Cys, and the digestibility of P increased and the digestibility of Ca reduced.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2004年第5期510-515,共6页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
国家"十五"科技攻关项目(2002BA514A20)资助
关键词
五龙鹅
黑麦草
消化规律
饲料利用率
氨基酸
氮代谢
Wulong Geese
Ryegrass
Crude fiber
Neutral detergent fiber
Acid detergent fiber
Amino acid
Nitrogen metabolism
Digestion coefficient regulation
