The Effect of Level and Source of Dietary Selenium Supplementation on Eggshell Quality
| Autor: | Zdenka Škrbić, Zlatica Pavlovski, Živan Jokić, Slađana Šobajić, Zoran Pavlović, Ivanka Miletić |
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| Rok vydání: | 2010 |
| Předmět: |
Animal feed
Endocrinology Diabetes and Metabolism Clinical Biochemistry chemistry.chemical_element Body size Biochemistry Breaking strength Inorganic Chemistry 03 medical and health sciences Egg Shell Selenium Animal science Animals Percentage shell Eggshell 030304 developmental biology 2. Zero hunger 0303 health sciences Chemistry Biochemistry (medical) 0402 animal and dairy science Dietary Selenium 04 agricultural and veterinary sciences General Medicine Shell breaking force 040201 dairy & animal science Animal Feed Crystallography Breaking force Dietary Supplements Eggshell thickness Shape index Female Stress Mechanical Index of shape Shell deformation Chickens |
| Zdroj: | Biological Trace Element Research |
| Popis: | A 16-week-long experiment was performed to compare the effect of sodium selenite (SS) and selenium-enriched yeast (SY) supplementation on eggshell quality and also to evaluate breaking force correlation with other parameters of shell quality originating from hens fed with selenium supplementation. One hundred Shaver 579 hens (27 weeks old) with similar body size were randomly divided for five dietary treatments: basal diet without selenium supplementation and basal diets with two levels of selenium supplementation (0.4 or 0.8 mg/kg) via SS or SY. No adverse effect of Se inclusion in hen's feed, regardless of its source, on shell breaking force, shell deformation, shape index, shell thickness and shell percentage, were observed throughout the current study (P > 0.05). Moderate correlations were found between breaking force and nondestructive shell deformation for all diets (P (lt) 0.05). There was no significant overall correlation between egg breaking force and shell thickness or/and percentage shell in the presence of selenium supplemention (P > 0.05). Shape index in all four selenium-supplemented groups was not related to the breaking force (P > 0.05). Selenium supplementation of up to 0.8 mg/kg, regardless of its source, in the diet of laying hens in their first phase of laying does not adversely affect eggshell quality. |
| Databáze: | OpenAIRE |
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