{"id":6118,"date":"2021-07-30T10:20:00","date_gmt":"2021-07-30T08:20:00","guid":{"rendered":"https:\/\/www.globalvetslab.com\/?p=6118"},"modified":"2021-09-17T12:43:22","modified_gmt":"2021-09-17T10:43:22","slug":"the-calcium-in-diets-for-laying-hens-2","status":"publish","type":"post","link":"https:\/\/www.deltalabs.online\/en\/the-calcium-in-diets-for-laying-hens-2\/","title":{"rendered":"THE CALCIUM IN DIETS FOR LAYING HENS"},"content":{"rendered":"\n

Introduction<\/h2>\n\n\n\n

Calcium is an essential element to maintain the skeleton <\/strong>and obtain qualified eggshells in layers <\/strong>(Mart\u00edn 2019; Technonews 2015). For these reasons, hens have high calcium requirements that need to be met, as much as possible, through the calcium present in the diet.<\/p>\n\n\n\n

Including the right amount of calcium in the diet <\/strong>will help to minimize <\/strong>the percentage of broken eggs and bone problems<\/strong>, which, consequently, will result in good performance rates and high-quality eggs.<\/p>\n\n\n\n

Evolution of calcium requirements<\/h2>\n\n\n\n

Diets for pullets and laying hens should meet the requirements of each development stage<\/strong>. This means that the calcium inclusion in the feed needs to be adjusted to the feed intake and the current needs of the pullets and hens.<\/p>\n\n\n\n

Table 1. Calcium requirements (%) in layers. Adapted from Rostagno, 2017<\/strong><\/td><\/tr>
Stage<\/strong><\/td>Starter<\/strong><\/td>Development<\/strong><\/td>Pre-laying<\/strong><\/td>Laying<\/strong><\/td><\/tr>
Age (week)<\/strong><\/td>1-4<\/td>5-10<\/td>11-15<\/td>16-18<\/td>Average<\/td><\/tr>
Calcium (%)<\/strong><\/td>0.970<\/td>0.950<\/td>0.860<\/td>2.200<\/td>4.508<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Calcium requirements are the highest <\/strong>during the laying period, especially right before and during the laying peak <\/strong>(Saunders-Blades et al. 2009). These requirements start increasing during the pre-laying period, when they are around 2.2%, and reach 3.8% at the start of egg production. As the laying period goes on, the recommended calcium levels increase above 4%.<\/p>\n\n\n\n

Content of calcium in different sources<\/h2>\n\n\n\n

The content and purity of calcium sources <\/strong>must be considered during feed formulation to adjust the levels of this mineral to the birds\u2019 requirements. The content and purity of the ingredients will have an impact on the final percentage of calcium available in the digestive tract, the one to be absorbed by the animal.<\/p>\n\n\n\n

\"La
Sources: (Blas et al. 2019; Rostagno et al. 2017)<\/figcaption><\/figure><\/div>\n\n\n\n

Particle size<\/h2>\n\n\n\n

Particle size of the calcium source <\/strong>needs to be considered, too, since it is related to the gut retention time.<\/strong><\/p>\n\n\n\n

Longer gut retention periods in the digestive tract increase calcium utilization<\/strong>. Besides, since it extends the duration of calcium absorption, it is possible to supply calcium <\/strong>when the animal is no longer eating, which is at night, and this concurs with the period of eggshell calcification<\/strong> (Saunders-Blades et al. 2009; de Witt et al. 2009).<\/p>\n\n\n\n

\"La<\/figure><\/div>\n\n\n\n

This chart shows how coarse calcium sources (between 2 and 4 mm) increase with layers\u2019 age, because their digestive tract is more adapted to bigger particles and hens would prefer big particles as they get older.<\/p>\n\n\n\n

How can we help you?<\/h2>\n\n\n\n

In Delta Labs<\/a>, we offer the feed formulation and analysis <\/strong>service to evaluate and optimize the dietary levels of calcium to optimize productive performance and prevent the problems caused by calcium deficiencies.<\/p>\n\n\n\n

To use the service, please contact us through our webpage www.globalvetslab.com<\/a> or email at info@globalvetslab.com<\/a><\/p>\n\n\n\n

Bibliography<\/h2>\n\n\n\n

Blas, C. de, P. Carc\u00eda-Rebollar, M. Gorrachategui, and G.G. Mateos. 2019. Tablas FEDNA de composici\u00f3n y valor nutritivo de alimentos para la fabricaci\u00f3n de piensos compuestos FEDNA (Fundaci\u00f3n Espa\u00f1ola Para El Desarrollo de La Nutrici\u00f3n Animal)<\/em>. 4th ed. Madrid. http:\/\/www.fundacionfedna.org\/ingredientes-para-piensos.<\/p>\n\n\n\n

Mart\u00edn, Nuria. 2019. \u201cFormaci\u00f3n de La C\u00e1scara de Huevo.\u201d Veterinaria digital. Art\u00edculos.<\/em> https:\/\/www.veterinariadigital.com\/articulos\/formacion-de-la-cascara-de-huevo\/.<\/p>\n\n\n\n

Rostagno, Horacio Santiago et al. 2017. Tablas Brasile\u00f1as Para Aves y Cerdos. Composici\u00f3n de Alimentos y Requerimientos Nutricionales<\/em>. 4th ed. ed. Horacio Santiago Rostagno. Universidad Federal de Vi\u00e7osa, Departamento de Zootecnia.<\/p>\n\n\n\n

Saunders-Blades, J. L., J. L. Macisaac, D. R. Korver, and D. M. Anderson. 2009. \u201cThe Effect of Calcium Source and Particle Size on the Production Performance and Bone Quality of Laying Hens.\u201d Poultry Science<\/em> 88(2): 338\u201353. http:\/\/dx.doi.org\/10.3382\/ps.2008-00278.<\/p>\n\n\n\n

Technonews. 2015. \u201cLos Requerimientos de Calcio y F\u00f3sforo En Gallinas Ponedoras.\u201d Veterinaria Digital<\/em>. https:\/\/www.veterinariadigital.com\/post_blog\/los-requerimentos-de-calcio-y-fsforo\/.<\/p>\n\n\n\n

de Witt, F. H., N. P. Kuleile, H. J. van der Merwe, and M. D. Fair. 2009. \u201cEffect of Limestone Particle Size on Bone Quality Characteristics of Hens at End-of-Lay.\u201d South African Journal of Animal Sciences<\/em> 39(SUPPL. 1): 41\u201344.<\/p>\n","protected":false},"excerpt":{"rendered":"

Introduction Calcium is an essential element to maintain the skeleton and obtain qualified eggshells in layers (Mart\u00edn 2019; Technonews 2015). For these reasons, hens have high calcium requirements that need to be met, as much as possible, through the calcium … Read More<\/a><\/p>\n","protected":false},"author":52,"featured_media":5982,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[20,19],"yoast_head":"\nCalcium in diets for laying hens<\/title>\n<meta name=\"description\" content=\"Including the right amount of calcium in the diet of the hen will help to minimize the percentage of broken eggs and bone problems,\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.deltalabs.online\/en\/the-calcium-in-diets-for-laying-hens-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Calcium in diets for laying hens\" \/>\n<meta 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