Effects of Dietary Silicate Based Complex Mineral on Performance, Egg Quality and Immunological Competence in Laying Hens

Abstract

This study was conducted to investigate the effect of feeding with dietary silicate based complex mineral (SCM) on the performance of laying hens. SCM at five levels (0%, 0.2%, 0.4%, 0.6% and 0.8%) was added to commercial diets, and fed to four hundred fifty Hy-Line Brown from fifty four to sixty five weeks of age. Egg production increased as the addition of dietary SCM to basal diets increased up to 0.6% (P<0.05). Furthermore, Feed intake increased in a manner similar to that of egg production (P<0.05). However, there was no difference in feed efficiency among the treatments. Eggshell thickness and breaking strength were significantly higher for the chickens fed with SCM than control from sixty weeks old to the end of experiment (P<0.05). Similarly, albumen height and Haugh unit were significantly higher for the chickens fed with SCM compared to those of control group (P<0.05). AST of birds fed SCM showed significantly higher than control (P<0.05). However, blood neutral fat level tended to increase in SCM treatments. Moreover, bone mineral density increased with SCM addition up to 0.4% (P<0.05). IL-2 (Interleukin-2) and IL-6 (Interleukin-6) levels appeared to be improved in the chickens fed with SCM addition diets, although not statistically different from all treatments. The results of this study indicated that the optimum SCM for improving the performance, egg quality and immunological competence of laying hens from 54 to 65 weeks of age was 0.6%.(Key words: egg quality, immunological competence, laying hens, performance, silicate complex mineral) † To whom correspondence should be addressed : seon@jbnu.ac.kr 서 론 국내에서 주요 광물질에 속하는 규산염계 복합광물질은 널리 분포되어 있으며, 표면에 친수성 미세구멍이 다량 존재 하여 흡착력이 강하므로 산업적으로 토질개량과 이온교환 장치 등으로 광범위하게 이용되어 왔으며, 축산업에서는 이 러한 규산염 계통 이외에도 제오라이트(zeolite), 벤토나이트 (bentonite), 고령토(kaolin) 및 흑운모(biotite) 등을 활용하여 항생제를 대체하는 사료첨가제로 연구하여 왔다 (Safaeikatouli et al., 2011;Melegy et al., 2015;Yenice et al., 2015).

Interactive effects of dietary supplementation between illite and probiotic on productive performance, intestinal microflora, and blood profiles of laying hens

“…consisting of around 90% of ground minerals have been used as feed additives in poultry diets to improve their production performance (Safaeikatouli et al, 2012). Our result of improved EP by illite supplementation supported the findings of an earlier study (Lim et al, 2017), which reported that EP levels of hens fed a diet supplemented with dietary 0.6% silicate‐based mineral were increased. Chen, Liu, et al (2019) have reported that a villus height: crypt depth (VH:CD) of ileum from hens fed 1.2 g/kg silicate mineral (montmorillonite [MMT]) is increased compared with that fed a control diet.…”

“…With respect to blood profiles of hens fed the diet with illite, our findings were similar with those of Hu et al (2019), who reported that higher IgG, IgA, and total antioxidant capacity (T‐AOC) levels were confirmed by illite addition (0.4%) in pigs. In addition, Lim et al (2017) showed that the inclusion of complex silicate minerals (0.6%) for laying hens increased bone density but had no effect on IL‐6. The IL‐6, which plays the induction of intercellular adhesion molecules and the recruitment of leukocytes, exerts an influence on the course of inflammation (Cronstein, 2007).…”

Evaluation of Bentonite as a Feed Additive to Improve Egg Quality in 74-week Old Laying Hens

“…Overall, the differences found in shell and yolk could be related to the interactive effects of the calcined shell and bentonite, where there is a high ion exchange capacity that binds cations (Adams et al, 2005). Similarly, Lim et al (2017) found that using a silicate based complex mineral from 0.2% to 0.8% increased eggshell thickness in laying hens. In addition, Kermanshahi et al (2011) reported that using a clay mineral (natural zeolite) had no remarkable effect on yolk or albumen mass but, instead, affected yolk color.…”

“…This result suggests that improvements in albumen height and Haugh unit in laying hens with advancing age was the result of the properties of bentonite (Adam et al, 2005). Similarly, Lim et al (2017) showed that adding 0.2% to 0.8% of a silicate-based complex mineral to the diets of laying hens resulted in significantly higher albumen height and Haugh unit when compared to that of the control groups. Albumen height and Haugh unit are important indices for determining the quality of eggs.…”