摘要
本文旨在用强饲-排空法研究肉鸭植物性饲料原料有效磷的可加性。选择体重相近的21日龄樱桃谷雄性肉鸭84只,随机分为7组,每组6个重复,每个重复2只鸭。分别强饲70g玉米、豆粕、棉籽粕、菜籽粕和等比例混合的玉米-豆粕、玉米-豆粕-棉籽粕、玉米-豆粕-棉籽粕-菜籽粕混合饲粮,集粪袋法收集48h排泄物,测定磷的生物学效价。结果显示,肉鸭对3种组合混合饲粮中,玉米-豆粕-棉籽粕组合的总磷表观利用率、总磷真利用率、表观有效磷和真有效磷的实测值与计算值差异显著(P<0.05),玉米-豆粕和玉米-豆粕-棉籽粕-菜籽粕2种混合饲粮实测值与计算值差异不显著(P>0.05)。由此得出如下结论:1)饲料原料真有效磷的可加性优于表观有效磷的可加性;2)不同饲料原料可加性优劣因原料组合不同而存在一定的差异。
This study was executed to research the evaluation and additivity of available phosphorus（P）in feedstuffs of plant origin for ducks with emptying-force-feeding method.Eight-four 21-day-old ducks with similar weight and excreta-collecting apparatus were randomly assigned into 7 treatments with 6 replicates in each treatment and 2 ducks in each replicate.The ducks under trial were starved for 72 h.After fasting period,the ducks from different treatments were fed by gavage with 70 g corn,soybean meal,cottonseed meal,rapeseed meal or their equal proportion mixtures,which included corn-soybean,corn-soybean-cottonseed,and corn-soybean-cottonseed.Excreta was collected separately for 48 h and bioavailability of P was evaluated.The results showed that for mixed diets corn-soybean-cottonseed,there was significant difference between analyzed and calculated values for the apparent phosphorus availability,true phosphorus availability,apparent available phosphorus and true available phosphorus（P0.05）,while there was no significant difference between the other two mixed diets（P0.05）.It was concluded that,1）the additivity of true available phosphorus was better than that of apparent phosphorus for different feedstuffs of plant origin;2）the additivity of apparent available phosphorus and true available phosphorus were variable for different combination of feedstuffs.
出处
《动物营养学报》
CAS
CSCD
北大核心
2010年第4期917-922,共6页
CHINESE JOURNAL OF ANIMAL NUTRITION
关键词
鸭
植物性饲料原料
总磷真利用率
可加性
duck
feedstuffs of plant origin
true total phosphorus availability
additivity
