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Feeding high-oleic peanuts to layer hens enhances egg yolk color and oleic fatty acid content in shell eggs.

Poultry science
April 1, 2019
Ondulla T Toomer et al. (6 authors)
Journal ArticleAnimal Study
Study Details

Study Goal

The researchers aimed to determine the impact of feeding high-oleic (HO) peanuts to laying hens on performance, egg lipid chemistry, and egg quality.

Results Summary

Eggs from hens fed HO peanuts had reduced weight but improved yolk color, higher HO fatty acid and β-carotene levels, and lower saturated and trans fats compared to controls. No differences in hen performance or egg quality were observed, and no peanut protein allergenicity was detected.

Population

Forty-eight 40-week-old layer hens.

Effective Dosage

Not specified (HO peanut + corn diet vs. soybean meal + corn control diet).

Duration

10 weeks.

Interactions

None mentioned.

Extracted Claims (9)
InterventionDirectionEndpointPopulationDosageImpactClaim #
HO peanut + corn diet
no change
hen performance
layer hens
no significant differences
no significant differences
#1
HO peanut + corn diet
no change
egg quality as measured by USDA grade quality, egg albumen height, or egg Haugh unit
layer hens
no significant differences
no significant differences
#2
HO peanut + corn diet
decrease
egg weights
layer hens
-
had reduced
#3
HO peanut diet
increase
yolk color scores
layer hens
-
had greater
#4
HO peanut diet
increase
HO fatty acid levels
layer hens
-
had greater
#5
HO peanut diet
increase
β-carotene levels
layer hens
-
had greater
#6
control diet
increase
palmitic and stearic saturated fatty acids content
layer hens
-
had greater
#7
control diet
increase
trans fat content
layer hens
-
had greater
#8
HO peanut diet
no change
egg protein extracts
layer hens
non-reactive
were non-reactive
#9
Abstract

Previous studies have identified normal-oleic peanuts as a suitable and economical broiler feed ingredient. However, no studies to date have examined the use of high-oleic (HO) peanut cultivars as a feed ingredient for laying hens and determined the impact of feeding HO peanuts on performance and egg nutritive qualities. This project aimed to examine the use of HO peanuts as a feed ingredient for layer hens to determine the effect on performance, egg lipid chemistry, and quality of the eggs produced. Forty-eight 40-wk-old layer hens were fed a conventional soybean meal + corn control diet or a HO peanut + corn diet for 10 wk in conventional battery cages. Body and feed weights were collected weekly. Pooled egg samples were analyzed for quality, lipid analysis, and peanut protein allergenicity. There were no significant differences in hen performance or egg quality as measured by USDA grade quality, egg albumen height, or egg Haugh unit between the treatment groups. However, eggs produced from layer hens fed the HO peanut + corn diet had reduced egg weights relative to the controls (P = 0.0001). Eggs produced from layer hens fed the HO peanut diet had greater yolk color scores (P < 0.0001), HO fatty acid (P < 0.0001), and β-carotene (P < 0.0001) levels in comparison to the controls. Eggs produced from hens fed the control diet had greater palmitic and stearic saturated fatty acids (P < 0.0001), and trans fat (P < 0.0001) content compared to eggs produced from hens fed the HO peanut diet. All egg protein extracts from all treatments at each time point were non-reactive with rabbit anti-peanut agglutinin antibodies. This study identifies HO peanuts as an abundant commodity that could be used to support local agricultural markets of peanuts and poultry within the southeastern United States and be of economic advantage to producers while providing a potential health benefit to the consumer with improved egg nutrition.

Medical Subject Headings (MeSH)
AnimalsArachisChickensColorEgg ShellEgg YolkFatty AcidsFemaleLinoleic AcidsOleic AcidsRandom Allocation
Study Links
Quality Scores
Safety90
Efficacy85/10
Quality80/10
Citation Metrics
Total Citations15
Citations/Year2.5
Relative Citation Ratio1.79
NIH Percentile71.1%
Research Impact Scores
APT Score0.05
Weight Score1.67
Normalized Score0.86
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