Effects of Dietary Fe-soy Proteinate and MgO on Egg Production and Quality of Eggshell in Laying Hens

Abstract

This study investigated the effects of Fe-soy proteinate (Fe-SP) and magnesium oxide (MgO) dietary supplements on eggshell quality in laying hens. A total of 800 26-wk-old Hy-Line Brown hens were assigned to four dietary treatments: control (C), Fe-SP 100 (100 ppm Fe-soy proteinate), MgO (3 g MgO/kg diet), and Fe-SP 100+MgO. Each treatment had five replicates of 40 hens. The FT-IR (Fourier transform infrared) and XRD (X-ray diffraction) spectra of Fe-soy proteinate were different from those of FeSO 4 and soy digest. There were no significant differences among treatments in hen-day egg production, hen-house egg production, broken and soft egg rate, feed intake, or feed conversion. The MgO and Fe-SP 100+MgO treatments showed significantly (p<0.05) higher egg weights than the control group. Eggshell strength and thickness were significantly (p<0.05) higher in the MgO supplemented groups. The lightness and yellowness of the eggshells decreased, and the redness increased significantly in the Fe-SP treated groups. There were no significant differences among treatments in leukocyte level, but hemoglobin (Hb) concentrations were higher with Fe-SP treatments. In conclusion, supplementation with Fe-SP significantly affects eggshell color and hemoglobin concentration, whereas MgO supplementation increases eggshell strength and thickness. Egg weight and egg shell quality can be improved by supplementation of 100 ppm Fe in the form of Fe-SP and 3 g MgO/kg diet.

Effects of Fe-soy Proteinate Chelate Supplementation to Diets of Periparturient Sows and Piglets on the Fe Level in the Blood of Piglets

“…This result is in good agreement with the results of Park et al (2004) and Paik et al (2009). The production index was highest in the Cu-SP 100 group (Seo et al, 2010). Recent information suggests that chelated or complex trace elements may improve the bioavailability of minerals for pigs and poultry.…”

“…Fe content of egg-yolk was effectively increased by supplementing 100 ppm iron as Fe-SP for 5 wk (Seo et al, 2008). Eggshell color significantly improved due to supplementation of Fe-SP 100 (Seo et al, 2010). This result is in good agreement with the results of Park et al (2004) and Paik et al (2009).…”

“…2, respectively. They were similar to those of Seo et al (2010). In the IR spectra of Fe-SP, the C=O stretching frequency significantly shifted to a higher energy, indicating Feed intake, kg/head/piglet 6.03 the coordination of the C=O group to the ferrous ion.…”

“…Piglets of control group were intramuscularly injected with 100 mg of slow release Fe as Fe dextran (Ferriaid ® : Bomac Laboratories Ltd., Newzealand) 3 d after birth. The Fe-SP used in this experiment was manufactured by the method of Seo et al (2010). Diets of sows and piglets were prepared in mash form.…”

A selection study for improving eggshell colour in two parent lines of laying hens and their hybrids

“…They concluded that eggshell colour generally gets lighter as the hen ages. Seo et al (2010) warned that feed supplemented with Fe soy proteinate significantly improved eggshell colour in brown-egg-laying hens. Further research by Dearborn et al (2012), explained that diet had a very limited effect on eggshell spectral reflectance, but individual females differed strongly and consistently from one another in eggshell colour.…”