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INFLUENCE OF THREONINE SUPPLEMENTED LEVELS ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF LAYING JAPANESE QUAILS.

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Last updated: 04 Jan 2025

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Abstract

This study was carried out to investigate the influence of dietary levels threonine on the productive and reproductive performance of laying Japanese quails. One hundred and sixty- two of adult Japanese quails (6 weeks of age) were divided into 9 treatments (18 in each). Each treatment group was divided into six replicates of 3 birds (one male and two females) in each treatment. Birds were fed nine experimental diets,  where threonine supplementation levels were 0.0, 0.5, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35 and 0.40%.
Results obtained showed that: Increasing dietary threonine level caused increase in most egg productive traits of laying Japanese quail. The supplemented threonine at level 0.15 % to the basal diet significantly (P£ 0.01)  showed the best results in egg weight (EW), feed intake (FI), daily egg production (DEP),  feed conversion (FC),  egg mass (EM), egg production (EP) and egg number (EN) of Japanese quails. However, there were significant differences (P£ 0.05) among treatment in egg weight, shape index, yolk weight percentage and Haugh units, while other measurements of egg quality did not influence by dietary threonine levels. Also, no significant differences shown among treatment groups in both males or females in reproductive organs. Dietary threonine levels at 0.20% recorded the best value of hatchability per total and fertile eggs (77.82 and 80.63%, respectively). High economic efficiency and relative economic efficiency obtained for Japanese quails fed diets  supplemented with threonine (Thr) at levels 0.05 and 0.15%,  respectively.
Conclusively, it could be concluded that diets of laying Japanese quails determined according to NRC recommendation were not sufficient for threonine needs. It is worthy to note that diets supplemented with Thr at levels 0.05 up to 0.15% resulted improvement in egg production traits, egg quality, hatchability  (%), as well as,  economic efficiency and relative economic efficiency, under Egyptian environmental conditions.
 

DOI

10.21608/jpd.2009.44620

Keywords

Threonine levels, corn- soybean diet, egg productive and reproductive traits, Japanese quails

Authors

First Name

Ibrahim

Last Name

Assaf

MiddleName

-

Affiliation

Animal Production Reseasrch Institute, Agriculture Research Center, Giza, Egypt

Email

dr.assaf2007@yahoo.com

City

Animal Production Reseasrch Institute,Giza

Orcid

-

First Name

Ibrahim

Last Name

Azzazi

MiddleName

-

Affiliation

Animal Production Reseasrch Institute, Agriculture Research Center, Giza, Egypt

Email

ibrahimazazi@yahoo.com

City

Giza

Orcid

-

First Name

Abd El Baky

Last Name

Torkia

MiddleName

-

Affiliation

Animal Production Research Institute, Agricultural Research Center, Giza, Egypt.

Email

-

City

Giza

Orcid

-

First Name

El Sayed

Last Name

EL- Sysy

MiddleName

-

Affiliation

Animal Production Research Institute, Agricultural Research Center, Giza, Egypt.

Email

-

City

Animal Production Research Institute, Giza,

Orcid

-

Volume

14

Article Issue

1

Related Issue

6931

Issue Date

2009-01-01

Receive Date

2008-11-24

Publish Date

2009-01-01

Page Start

223

Page End

238

Print ISSN

1110-2543

Online ISSN

2682-3322

Article File

JPD_Volume 14_Issue 1_Pages 223-238.pdf

PDF . 217.2kB

Link

https://jpd.journals.ekb.eg/article_44620.html

Detail API

https://jpd.journals.ekb.eg/service?article_code=44620

Order

13

Type

Original Article

Type Code

867

Publication Type

Journal

Publication Title

Journal of Productivity and Development

Publication Link

https://jpd.journals.ekb.eg/

MainTitle

INFLUENCE OF THREONINE SUPPLEMENTED LEVELS ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF LAYING JAPANESE QUAILS.

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Type

Article

Created At

22 Jan 2023