动物营养学报 >

2018 , Vol. 30 >Issue 9: 3364 - 3376

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.09.004

磷营养与饲料专栏 Special section:phosphorus nutrition and feed

磷酸一二钙对肉鸭相对生物学利用率的研究

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  • 中国农业科学院饲料研究所, 农业部饲料生物技术重点开放实验室, 生物饲料开发国家工程研究中心, 北京 100081
李文静(1993-),女,河北张家口人,硕士研究生,从事家禽营养与饲料科学研究。E-mail:2490154978@qq.com

收稿日期: 2017-12-13

  网络出版日期: 2018-09-20

基金资助

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）

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A Study of Relative Bioavailability of Mono-Dicalcium Phosphate on Meat Ducks

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  • Key Laboratory of Feed Biotechnology of Agricultural Ministry, National Engineering Research Center of Biological Feed, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Received date: 2017-12-13

  Online published: 2018-09-20

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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MDCP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% MDCP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MDCP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% MDCP添加组的料重比显著低于其他MDCP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，MDCP可以替代DCP作为肉鸭饲粮的磷来源；MDCP为磷来源时，1~21日龄肉鸭饲粮适宜的非植酸磷水平为0.355%，22~42日龄肉鸭饲粮适宜的非植酸磷水平为0.305%。综合肉鸭体重、体增重和胫骨矿化指标，肉鸭MDCP相对于DCP（100%）的生物学利用率是109.85%。

关键词： 肉鸭:磷酸一二钙; 磷酸氢钙; 生物学利用率

本文引用格式

李文静, 常文环, 陈志敏, 郑爱娟, 刘国华 . 磷酸一二钙对肉鸭相对生物学利用率的研究[J]. 动物营养学报, 2018 , 30(9) : 3364 -3376 . DOI: 10.3969/j.issn.1006-267x.2018.09.004

Abstract

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<0.05). The tibia ash, calcium and phosphorus contents and tibias strength of meat ducks at 42 days of age were linearly increased with the phosphorus supplemental level increased; there was a significant interaction in tibia calcium content of meat ducks at 42 days of age between phosphorus source and supplemental level (P<0.05). 3) At 21 days of age, the serum phosphorus content of meat ducks in MDCP group was significantly lower than that in DCP group (P<0.05), the serum calcium and phosphorus contents in 0.075% MDCP or DCP groups was significantly higher than those in other MDCP or DCP groups (P<0.05), the serum alkaline phosphatase activity in 0.075% and 0.150% MDCP or DCP groups was significantly higher than those in other MDCP or DCP groups (P<0.05). At 42 days of age, the serum phosphorus content and alkaline phosphatase activity of meat ducks were decreased with DCP or MDCP supplemental levels increased, the serum phosphorus content in 0.12% DCP group was significantly higher than that in other DCP groups (P<0.05). In conclusion, MDCP can be used as phosphorus source replacing DCP in duck diets; in this case, the optimal non-phytate phosphorous levels in diets for meat ducks are 0.355% and 0.305% for 1 to 21 days of age and 22 to 42 days of age, respectively. According to body weight, body weight gain and tibia indexes, the bioavailability of MDCP relative to DCP(100%)is 109.85%.

Key words： meat ducks; MDCP; DCP; bioavailability

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