Research Note: L*a*b* color space for prediction of eggshell pigment content in differently colored eggs

Zeng, Lingsen; Xu, Guiyun; Jiang, Caiyun; Li, Junying; Zheng, Jiangxia

doi:10.1016/j.psj.2022.101942

Cited by 12 publications

(13 citation statements)

References 15 publications

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“…In the late egg-laying period, the eggshell color gradually becomes lighter as the age of the chickens increases, and eggs with a darker shell color are more popular among consumers, but there is no precise grading of the shade of brown-shell eggs [ 23 ]. It has been shown that the pigment in brown eggshell is formally protoporphyrin IX, and the concentration of iron, a raw material for heme synthesis, affects the production of protoporphyrin IX [ 24 ]. It was found that the addition of organic iron or ferrous sulfate in the diet of laying hens significantly improved eggshell color because iron is involved in the production of heme, which is closely related to eggshell pigmentation [ 13 ].…”

Section: Discussionmentioning

confidence: 99%

“…It was found that the addition of organic iron or ferrous sulfate in the diet of laying hens significantly improved eggshell color because iron is involved in the production of heme, which is closely related to eggshell pigmentation [ 13 ]. Therefore, in the present experiment, the enhancement of eggshell color might be because CPP has a role in promoting iron absorption, thus increasing the production and transport of protoporphyrin IX and heme and enhancing the deposition of pigments on the eggshell [ 24 ].…”

Section: Discussionmentioning

confidence: 99%

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Effect of Dietary Casein Phosphopeptide Addition on the Egg Production Performance, Egg Quality, and Eggshell Ultrastructure of Late Laying Hens

Liu

Lin

Zhang

et al. 2023

Foods

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(1) Objective: This study aimed to assess the effects of dietary casein phosphopeptide (CPP) supplementation on the egg production performance of late laying hens and the resulting egg quality and eggshell ultrastructure. (2) Methods: A total of 800 laying hens aged 58 weeks were randomly assigned into 5 groups with 8 replicates of 20 hens each. The hens were fed a basal diet supplemented with 0 (control, T1), 0.5 (T2), 1.0 (T3), 1.5 (T4), and 2.0 (T5) g/kg CPP for 9 weeks. (3) Results: Dietary CPP supplementation was found to be beneficial for improving eggshell quality. The spoiled egg rate of the experimental groups was lower than that of the control group (linear and quadratic effect, p < 0.05). The yolk color in the T2, T3, and T4 groups was higher than that in the T1 group (quadratic effect, p < 0.05). The shell thickness in the T4 group was higher than that in the T1 and T2 groups (linear effect, p < 0.05). The shell color in the experimental groups was higher than that in the control group (linear and quadratic effect, p < 0.05). The effective thickness in the T3–T5 groups (linear and quadratic, p < 0.05) and the number of papillary nodes in the T2 and T3 groups were higher than those in the T1 group (quadratic, p < 0.05). The calcium content in the T2 and T3 groups was higher than that in the T1 group (quadratic effect, p < 0.05). The iron content in the T2 and T3 groups was higher than that in the T1 group (p < 0.05). (4) Conclusion: In summary, 0.5–1.0 g/kg CPP supplementation reduced the spoiled egg rate, enhanced the yolk and eggshell colors, increased the thickness of the effective layer, and the calcium and iron contents in the eggshell.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of Dietary Casein Phosphopeptide Addition on the Egg Production Performance, Egg Quality, and Eggshell Ultrastructure of Late Laying Hens

Liu

Lin

Zhang

et al. 2023

Foods

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“…However, the CIE Lab values (i.e., L*, a*, and b*) and cuticle coverage, which are also used to measure the intensity of the brown eggshell color (Kim et al, 2022; Leleu et al, 2011; Samiullah et al, 2015), were not affected by additional supplementation of organic or inorganic Fe in diets. No clear reason for this inconsistency is available; however, it is likely that eggshell color score is not always correlated with CIE Lab values and cuticle coverage of eggshells (Samiullah et al, 2015; Zeng et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Effects of dietary organic or inorganic iron concentrations on productive performance, egg quality, blood measurements, and tissue iron concentrations in aged laying hens

Kim

Kwon

et al. 2023

Animal Science Journal

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The objective of the current experiment was to investigate the effects of dietary organic or inorganic iron (Fe) concentrations on productive performance, egg quality, blood measurements, and tissue Fe concentrations in aged laying hens. A total of three hundred fifty 60‐week‐old Hy‐Line Brown laying hens were allotted to one of five dietary treatments with seven replicates. Each replicate had 10 consecutive cages. Organic Fe (Fe‐Gly) or inorganic Fe (FeSO4) was added to the basal diet at the levels of 100 or 200 mg/kg Fe. Diets were fed on an ad libitum basis for 6 weeks. Results indicated that supplementation of organic or inorganic Fe in diets increased (p < 0.05) eggshell color and feather Fe concentrations compared with no supplementation of Fe in diets. An interaction was found (p < 0.05) between Fe sources and supplemental levels in diets for egg weight, eggshell strength, and Haugh unit. Hens fed diets supplemented with organic Fe had greater (p < 0.05) eggshell color and hematocrit than those fed diets supplemented with inorganic Fe. In conclusion, dietary supplementation of organic Fe increases the eggshell color of aged laying hens. High supplemental levels of organic Fe in diets improve egg weight in aged laying hens.

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“…At 70 weeks of age, egg quality was recorded. The egg shape index (ESI) was calculated by the formula: egg length/egg width; eggshell color (ESC) was measured by the fast and easy-to-use CIE L*a*b* system [21] ; EW was obtained with an electronic balance (YP601N, Qinghai Co., Ltd., Shanghai, China) [22] .…”

Section: Methodsmentioning

confidence: 99%

In-depth investigation of the mechanisms of high and low residual feed intake regulating hens during the late laying period via liver and gut microbiota

Gao,

Zheng,

Mao

et al. 2024

Preprint

Self Cite

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The RFI is independent of growth traits and selecting individuals with low RFI can improve feed efficiency without affecting the laying performance and egg quality of hens. In this study it was found that under similar egg production rates hens in the HRFI group had lower nutrient digestion capacity disrupted lipid metabolism and lower feed utilization efficiency than those in the LRFI group. Further research and validation are needed to investigate the effects of AST HDL-C and ACTH on feed efficiency in the late laying period through serum biochemical index analysis. Through multiomics analysis genes such as ADCY2 ADCY8 CCKAR ACSS2 FABP1 and FABP4 and metabolites such as LysoPI(18:2(9Z,12Z)/0:0) were identified as key genes and biomarkers related to RFI in laying hens during the late laying period. These findings are important for developing strategies to improve feed efficiency in Rhode Island Red pure-line chickens during the late laying period. Additionally in-depth investigations such as histological observations enzyme activity analysis and integration of multiomics techniques are needed to unravel the physiological and biochemical mechanisms of digestive organs that impact feed utilization efficiency in poultry.

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Research Note: Lab* color space for prediction of eggshell pigment content in differently colored eggs

Cited by 12 publications

References 15 publications

Effect of Dietary Casein Phosphopeptide Addition on the Egg Production Performance, Egg Quality, and Eggshell Ultrastructure of Late Laying Hens

Effect of Dietary Casein Phosphopeptide Addition on the Egg Production Performance, Egg Quality, and Eggshell Ultrastructure of Late Laying Hens

Effects of dietary organic or inorganic iron concentrations on productive performance, egg quality, blood measurements, and tissue iron concentrations in aged laying hens

In-depth investigation of the mechanisms of high and low residual feed intake regulating hens during the late laying period via liver and gut microbiota

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