Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle
This study evaluated the effect of dietary calcium levels and limestone particle size distribution on first-cycle layer performance and egg quality. A completely randomized experimental design in 4x3 factorial arrangement (four Ca levels - 3.0, 3.5, 4.0, 4.5%; and three limestone particle size distributions - 100% fine, 50% fine and 50% coarse, 30% fine and 70% coarse) was applied, totaling 12 treatments with six replicates of eight birds each. The treatments did not influence the most of evaluated performance and internal and external egg quality parameters. However, limestone particle size distribution quadratically affected with percentage of defective eggs, with the lowest percentage obtained with the distribution 61.75% fine limestone and 38.25% coarse limestone. Increasing dietary Ca levels significantly increased eggshell weight per surface area and the percentage of Ca excreted in the feces. It was concluded that the combination of the highest dietary Ca level (4.5%) with 50% replacement of fine-particle limestone by coarse limestone results in better eggshell and increases the number of marketable eggs.
Main Authors: | , , , , , , , |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Fundacao de Apoio a Ciência e Tecnologia Avicolas
2009
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200003 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
oai:scielo:S1516-635X2009000200003 |
---|---|
record_format |
ojs |
spelling |
oai:scielo:S1516-635X20090002000032009-08-24Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cyclePelicia,KGarcia,EMóri,CFaitarone,ABGSilva,APMolino,ABVercese,FBerto,DA Egg production limestone marketable eggs nutrition poultry This study evaluated the effect of dietary calcium levels and limestone particle size distribution on first-cycle layer performance and egg quality. A completely randomized experimental design in 4x3 factorial arrangement (four Ca levels - 3.0, 3.5, 4.0, 4.5%; and three limestone particle size distributions - 100% fine, 50% fine and 50% coarse, 30% fine and 70% coarse) was applied, totaling 12 treatments with six replicates of eight birds each. The treatments did not influence the most of evaluated performance and internal and external egg quality parameters. However, limestone particle size distribution quadratically affected with percentage of defective eggs, with the lowest percentage obtained with the distribution 61.75% fine limestone and 38.25% coarse limestone. Increasing dietary Ca levels significantly increased eggshell weight per surface area and the percentage of Ca excreted in the feces. It was concluded that the combination of the highest dietary Ca level (4.5%) with 50% replacement of fine-particle limestone by coarse limestone results in better eggshell and increases the number of marketable eggs.info:eu-repo/semantics/openAccessFundacao de Apoio a Ciência e Tecnologia AvicolasBrazilian Journal of Poultry Science v.11 n.2 20092009-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200003en10.1590/S1516-635X2009000200003 |
institution |
SCIELO |
collection |
OJS |
country |
Brasil |
countrycode |
BR |
component |
Revista |
access |
En linea |
databasecode |
rev-scielo-br |
tag |
revista |
region |
America del Sur |
libraryname |
SciELO |
language |
English |
format |
Digital |
author |
Pelicia,K Garcia,E Móri,C Faitarone,ABG Silva,AP Molino,AB Vercese,F Berto,DA |
spellingShingle |
Pelicia,K Garcia,E Móri,C Faitarone,ABG Silva,AP Molino,AB Vercese,F Berto,DA Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle |
author_facet |
Pelicia,K Garcia,E Móri,C Faitarone,ABG Silva,AP Molino,AB Vercese,F Berto,DA |
author_sort |
Pelicia,K |
title |
Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle |
title_short |
Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle |
title_full |
Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle |
title_fullStr |
Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle |
title_full_unstemmed |
Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle |
title_sort |
calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle |
description |
This study evaluated the effect of dietary calcium levels and limestone particle size distribution on first-cycle layer performance and egg quality. A completely randomized experimental design in 4x3 factorial arrangement (four Ca levels - 3.0, 3.5, 4.0, 4.5%; and three limestone particle size distributions - 100% fine, 50% fine and 50% coarse, 30% fine and 70% coarse) was applied, totaling 12 treatments with six replicates of eight birds each. The treatments did not influence the most of evaluated performance and internal and external egg quality parameters. However, limestone particle size distribution quadratically affected with percentage of defective eggs, with the lowest percentage obtained with the distribution 61.75% fine limestone and 38.25% coarse limestone. Increasing dietary Ca levels significantly increased eggshell weight per surface area and the percentage of Ca excreted in the feces. It was concluded that the combination of the highest dietary Ca level (4.5%) with 50% replacement of fine-particle limestone by coarse limestone results in better eggshell and increases the number of marketable eggs. |
publisher |
Fundacao de Apoio a Ciência e Tecnologia Avicolas |
publishDate |
2009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200003 |
work_keys_str_mv |
AT peliciak calciumlevelsandlimestoneparticlesizeinthedietofcommerciallayersattheendofthefirstproductioncycle AT garciae calciumlevelsandlimestoneparticlesizeinthedietofcommerciallayersattheendofthefirstproductioncycle AT moric calciumlevelsandlimestoneparticlesizeinthedietofcommerciallayersattheendofthefirstproductioncycle AT faitaroneabg calciumlevelsandlimestoneparticlesizeinthedietofcommerciallayersattheendofthefirstproductioncycle AT silvaap calciumlevelsandlimestoneparticlesizeinthedietofcommerciallayersattheendofthefirstproductioncycle AT molinoab calciumlevelsandlimestoneparticlesizeinthedietofcommerciallayersattheendofthefirstproductioncycle AT vercesef calciumlevelsandlimestoneparticlesizeinthedietofcommerciallayersattheendofthefirstproductioncycle AT bertoda calciumlevelsandlimestoneparticlesizeinthedietofcommerciallayersattheendofthefirstproductioncycle |
_version_ |
1756422980924080128 |