Abstract
Mineral-humic preparations Humokarbowit (HKW) and Humobentofet (HBF) were used in feeding of reproductive laying hens Lohmann Brown. The effect of these preparations on microelement composition of eggs was investigated. The content of microelements in hens diet, egg albumen and eggshell was determined by ICP-MS technique and relative bioaccumulation coefficient (RBC) was evaluated. The humic preparations significantly increased selenium and decreased molybdenum concentration in egg albumen. Increase of selenium and iron content in egg yolk and increase of iron concentration in eggshells was observed. The preparations did not influence the content of such elements as Cr, Co, Cu, I, Mn, Zn. The highest levels of RBC were found for selenium and iodine and the lowest for manganese.
Highlights
Bioelements play significant physiological role in laying hens, in particular in embryogenesis and organism development
The humic preparations used in the experiment significantly influenced the increase of selenium and decrease of molybdenum in egg albumen, increase of selenium and iron in yolk and increase of iron in eggshells
The highest relative bioaccumulation coefficient (RBC) was found for selenium and iodine and the lowest for manganese
Summary
Bioelements play significant physiological role in laying hens, in particular in embryogenesis and organism development. They have advantageous influence on health state of birds, laying and meat yield and on the quality of meat and eggs. Phosphoprotein, such as egg yolk phosvitin binds almost the whole iron in egg content[9] Trace elements, such as Cr, Ni, I, Zn can be bound by some lipid compounds of egg yolk[8,10] and many others can be incorporated in eggshells or eggshell membranes[11,12]. The aim of the present work was investigation of experimental feeding of humic preparations (Humokarbowit and Humobentofet) to reproductive flocks on elemental composition of eggs, in particular, the main microelements
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