有机锰和无机锰补充对老龄蛋鸡生产性能和蛋壳质量的影响。

Effect of organic and inorganic manganese supplementation on performance and eggshell quality in aged laying hens.

机构信息

Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.

出版信息

Vet Med Sci. 2023 May;9(3):1256-1268. doi: 10.1002/vms3.1116. Epub 2023 Mar 15.

DOI:10.1002/vms3.1116

PMID:36920852

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10188078/

Abstract

BACKGROUND

Manganese (Mn) is an important trace element for laying hen's nutrition, which is required in small amounts in the diet. Its deficiency results in lowered production performance and eggshell quality.

OBJECTIVES

This experiment was conducted to investigate the influence of different sources and levels of Mn on egg production performance and eggshell quality in aged laying hens.

METHODS

A total of 720, 83-week-old Hy-Line W-36 laying hens were fed a non-Mn supplemented basal diet for 4-week (to ime Mn-exhaustion of body) and then were allocated to a completely randomized design with 10 treatments, six replicates and 12 birds each. Concentration of Mn in the non-Mn supplemented basal diet was 10.34 mg/kg (treatment 1), the added doses of dietary Mn were included 30, 60, and 90 mg/kg of three different sources (Mn-oxide, Mn-sulphate, and Mn-organic) for treatments 2-10, respectively. The experiment lasted for 12 week.

RESULTS

Dietary supplementation with either organic or inorganic Mn sources significantly enhanced egg production (EP), egg mass (EM), feed conversion ratio (FCR), and relative eggshell weight (RESW) compared with the non-Mn supplemented diet. However, the experimental diets did not influence feed intake (FI), egg weight, and other eggshell quality traits. Based on the broken line regression models, the performance traits were optimized at 30-40 mg/kg Mn concentration when supplemented by Mn-sulphate or Mn-organic. Although, it was 80-90 mg/kg when supplemented by Mn-oxide. The relative bio-efficacy of inorganic Mn sources include Mn-oxide and Mn-sulphate in compare with Mn-organic were estimated 45% and 87% (for EP trait), 30% and 94% (for EM trait), 36% and 99% (for FCR trait), and 37% and 78% (for RESW trait), respectively.

CONCLUSIONS

In the aged laying hens, Mn requirement is higher than the NRC's recommendation. Sulphate and organic sources of Mn are more effective than Mn-oxide.

摘要

背景

锰（Mn）是蛋鸡营养的重要微量元素，其在饮食中需要的量很小。缺乏锰会导致产蛋性能和蛋壳质量下降。

目的

本试验旨在研究不同来源和水平的锰对老龄蛋鸡产蛋性能和蛋壳质量的影响。

方法

将 720 只 83 周龄海兰 W-36 产蛋鸡饲喂不含锰的基础日粮 4 周（以耗尽体内锰），然后采用完全随机设计，设 10 个处理，每个处理 6 个重复，每个重复 12 只鸡。不含锰的基础日粮中锰的浓度为 10.34mg/kg（处理 1），日粮中添加的锰剂量分别为 30、60 和 90mg/kg 三种不同来源（氧化锰、硫酸锰和锰有机）的饲料，分别为处理 2-10。试验持续 12 周。

结果

与不含锰的日粮相比，有机或无机锰源的日粮补充显著提高了产蛋率（EP）、蛋重（EM）、饲料转化率（FCR）和相对蛋壳重量（RESW）。然而，试验日粮对采食量（FI）、蛋重和其他蛋壳质量性状没有影响。根据折线回归模型，当补充硫酸锰或锰有机时，性能指标在 30-40mg/kg 锰浓度下得到优化。然而，当补充氧化锰时，其浓度为 80-90mg/kg。与锰有机相比，无机锰源（氧化锰和硫酸锰）的相对生物效价估计分别为 45%和 87%（EP 性状）、30%和 94%（EM 性状）、36%和 99%（FCR 性状）和 37%和 78%（RESW 性状）。