植物性骨化三醇降低了肉鸡日粮中钙和有效磷的需取量。

IF 1.7 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
S V Rama Rao, E T Reddy, M V L N Raju, B Prakash, S S Paul, T Srilatha, A Kannan, D Nagalaksmi
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引用次数: 0

摘要

1. 本试验旨在研究饲粮中添加骨化三醇(CT)对缺钙有效磷(Ca-aP)肉鸡(1 ~ 42 d)生产性能和骨矿化的影响。CT (10 mg/kg 1,25-di- oh - vitd3)来源于青叶龙葵2。配制推荐(Cobb 400)水平为Ca(9.4、9.2和8.8 g/kg)和aP(4.5、4.2和4 g/kg)的对照饲粮(CD)。共配制6种试验饲粮,其中2种降低饲粮(RD)的Ca和aP水平分别为推荐水平的80% (R80)和70% (R70)。两种降低饲粮均添加3个水平的CT(0、1和2µg/kg)。每种饲粮随机饲喂10个重复栏(198 × 122 cm),每栏25只1 ~ 42日龄的肉鸡。每两周记录体增重(BWG)和饲料系数(FCE)。采用腿异常评分法(LAS)测定大鼠跗关节畸形程度,并于第43天测定血清钙、磷浓度。对右胫骨进行了总灰分、钙、磷含量分析。减少Ca和aP或向RD补充CD对体重没有影响。同样,将Ca和aP减少到80%对FCE没有影响,而在70%时,FCE与CD组相比有所降低。在起始阶段和整个阶段(1-42 d),添加CT显著提高了FCE,与CD组相似。饲喂两种RD的肉鸡LAS增加,骨矿物质(如胫骨灰分及其钙、磷含量)降低。添加2µg/kg的CT显著降低LAS,改善骨矿物质变量,与饲喂cd的肉鸡相似。在不影响生产性能和骨矿化的情况下,以2µg/kg添加骨化三醇可将肉仔鸡饲粮钙和磷水平降低至推荐水平的70%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Plant-based calcitriol reduced the requirements of calcium and available phosphorus in broiler chicken diet.

1. An experiment was conducted to study the effects of supplementing calcitriol (CT) on performance and bone mineralisation in broilers (1-42 d) fed a calcium and available phosphorus (Ca-aP)-deficient diet. The CT (10 mg/kg 1,25-di-OH-VitD3) was derived from Solanum glaucophyllum leaf.2. A control diet (CD) with the recommended (Cobb 400) levels of Ca (9.4, 9.2 and 8.8 g/kg) and aP (4.5, 4.2 and 4 g/kg, respectively, in starter, grower and finisher) was prepared. Six experimental diets were prepared, which include two reduced diets (RD) formulated with 80% (R80) and 70% (R70) of the recommended levels of Ca and aP. Both RDs were supplemented with three levels of CT (0, 1 and 2 µg/kg). Each diet was offered ad libitum to 10 replicate pens (198 × 122 cm) containing 25 male broilers each from 1 to 42 d of age.3. Body weight gain (BWG) and feed conversion (FCE) were recorded bi-weekly. The degree of hock joint deformity was measured as leg abnormality score (LAS) and concentrations of Ca and P in serum were analysed on d 43. The right tibia was analysed for total ash, Ca and P in tibia ash.4. The BWG was not affected by either the reduction of Ca and aP or the supplementation of CD to the RD. Similarly, FCE was not affected by reducing the Ca and aP to 80%, while at 70%, the FCE was reduced compared to the CD group. Supplementation with CT significantly improved the FCE similar to the CD group during the starter phase and overall period (1-42 d).5. The LAS increased and bone minerals (as tibia ash and its Ca and P contents) reduced in broilers fed both RD. Supplementation with CT at 2 µg/kg significantly reduced LAS and improved the bone mineral variables similar to those fed the CD.6. Dietary Ca and aP levels can be reduced to 70% of the dietary recommendations for the broiler breed with supplementation of calcitriol at 2 µg/kg without affecting the performance and bone mineralisation.

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来源期刊
British Poultry Science
British Poultry Science 农林科学-奶制品与动物科学
CiteScore
3.90
自引率
5.00%
发文量
88
审稿时长
4.5 months
期刊介绍: From its first volume in 1960, British Poultry Science has been a leading international journal for poultry scientists and advisers to the poultry industry throughout the world. Over 60% of the independently refereed papers published originate outside the UK. Most typically they report the results of biological studies with an experimental approach which either make an original contribution to fundamental science or are of obvious application to the industry. Subjects which are covered include: anatomy, embryology, biochemistry, biophysics, physiology, reproduction and genetics, behaviour, microbiology, endocrinology, nutrition, environmental science, food science, feeding stuffs and feeding, management and housing welfare, breeding, hatching, poultry meat and egg yields and quality.Papers that adopt a modelling approach or describe the scientific background to new equipment or apparatus directly relevant to the industry are also published. The journal also features rapid publication of Short Communications. Summaries of papers presented at the Spring Meeting of the UK Branch of the WPSA are published in British Poultry Abstracts .
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