摘要
本试验采用双因子随机分组试验设计,旨在研究磷酸一二钙(MDCP)和磷酸氢钙(DCP)及其添加水平(前期为0.075%、0.150%、0.225%、0.300%和0.375%,后期为0.12%、0.18%、0.24%、0.30%)对肉鸭生长性能、血清生化指标和胫骨指标的影响,以评价M DCP对肉鸭的相对生物学利用率。试验前期(1~21日龄)共选用960只1日龄樱桃谷肉鸭,随机分成10个组,每组6个重复,每个重复16只鸭;试验后期(22~42日龄)选用720只22日龄樱桃谷肉鸭,随机分成8个组,每组6个重复,每个重复15只鸭。试验期42 d。结果表明:1)1~21日龄,随着MDCP或DCP添加水平由0.075%上升到0.225%,肉鸭的平均日增重和平均日采食量显著提高(P<0.05);0.075%MDCP添加组肉鸭的料重比显著高于其他MDCP添加组(P<0.05)。22~42日龄,0.12%M DCP或DCP添加组肉鸭的平均日增重、平均日采食量显著低于其他M DCP或DCP添加组(P<0.05);0.12%DCP添加组肉鸭的料重比高于其他DCP添加组(P>0.05),0.30%M DCP添加组的料重比显著低于其他M DCP添加组(P<0.05)。2)磷来源与添加水平互作显著影响21日龄肉鸭的胫骨强度(P<0.05),MDCP添加组肉鸭的胫骨强度显著高于DCP添加组(P<0.05);磷添加水平对21日龄肉鸭胫骨指标的影响显著(P<0.05)。42日龄肉鸭的胫骨灰分、钙、磷含量以及胫骨强度随着磷添加水平的增加而线性升高;磷来源与添加水平互作对42日龄肉鸭胫骨钙含量的影响显著(P<0.05)。3)21日龄,MDCP添加组肉鸭的血清磷含量显著低于DCP添加组(P<0.05),0.075%MDCP或DCP添加组血清钙、磷含量显著高于其他MDCP或DCP添加组(P<0.05),0.075%、0.150%MDCP或DCP添加组血清碱性磷酸酶活性显著高于其他MDCP或DCP添加组(P<0.05)。42日龄,肉鸭血清磷含量和碱性磷酸酶活性随DCP或MDCP添加水平的升高而逐渐降低,0.12%DCP添加组的血清磷含量显著高于其他DCP添加组(P<0.05)。结果提示,M DCP可以替代DCP作为肉鸭饲粮的磷来源;M DCP为磷来源�
This experiment was to study the effects of dicalcium phosphate （DCP） and mono-dicalcium phosphate （MDCP） and their supplemental levels （prior period： 0.075%, 0.150%, 0.225%, 0.300% and 0.375% ; later period： 0.12%, 0.18%, 0.24% and 0.30%） on performance, serum biochemical indexes and tibia indexes of meat ducks by two factor randomized block design, and to assess the relative bioavailability of MDCP for meat ducks. A total of 960 one-day-old Cherry Valley ducks were randomly divided into 10 groups with 6 replicates per group and 16 birds per replicate in the prior period （1 to 21 days of age）; and a total of 960 one-day-old Cherry Valley ducks were randomly divided into 8 groups with 6 replicates per group and 15 ducks per replicate in the later period （22 to 42 days of age）. The experiment lasted for 42 days. The results showed as follows： 1） during 1 to 21 days of age, the average daily gain （ADG） and average daily feed intake （ADFI） of meat ducks were significantly increased with DCP or MDCP supplemental levels rising from 0.075% to 0.225% （ P 〈 0.05）; the feed to gain ratio （F/G） of meat ducks in 0.075% MDCP group was significantly lower than that in other MDCP groups （ P 〈0.05）. During 22 to 42 days of age, the ADG and ADFI of meat ducks in 0.12% MDCP or DCP groups were significantly lower than those in other MDCP or DCP groups （ P 〈0.05）, the F/G of meat ducks in 0.12% DCP group was significantly higher than that in other DCP groups （ P 〈0.05）, the F/G of meat ducks in 0.30% MDCP group was significantly lower than that in other MDCP groups （ P 〈0.05）. 2） There was a significant interaction in tibia strength of meat ducks at 21 days of age between phosphorus source and supplemental level （ P 〈0.05）, the tibia strength of meat ducks in MDCP groups was significantly higher than in DCP groups （ P 〈0.05）; dietary phosphorus supplemental level was significantly affect the tibia indexes of meat ducks at 21 days of age （ P 〈0.0
作者
李文静
常文环
陈志敏
郑爱娟
刘国华
LI Wenjing;CHANG Wenhuan;CHEN Zhimin;ZHENG Aijuan;LIU Guohua(Key Laboratory of Feed Biotechnology of Agricultural Ministry,National Engineering Research Center of BiologicalFeed,Feed Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2018年第9期3364-3376,共13页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
中国农业科学院科技创新工程协同创新任务子任务"瘦肉型北京鸭饲料配制技术研究与示范"(CAAS-XTCX201611)
