Effect of digestible threonine on performance, egg quality, blood metabolites, and immune responses in laying hens fed a wheat-based diet in the second cycle

Hossaninejad, Seyed Amir; Zarghi, Heydar; Golian, Abolghasem

doi:10.1080/1828051x.2021.2004248

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…For evaluating egg quality traits, six eggs/replicate (36 eggs/treatment) from eggs laid throughout the 3 consecutive days by the end of every period (26–28 days) were randomly selected and transported to an egg quality laboratory. On the sampled eggs, maximum width and length were measured by passing the eggs through the digital Caliper (0.05 mm, Model 1116−150, Insize Co. Ltd., Suzhou, China) to obtain the maximum points and then calculating the egg shape index by the following formula (Hossaninejad et al., 2021):

\begin{equation*}{\rm{Shape\;index\;}} = \frac{{{\rm{Egg\;width}}}}{{{\rm{Egg\;length}}}}\;\; \times 100.\end{equation*}

…”

Section: Methodsmentioning

confidence: 99%

“…A moist cloth napkin was used to get rid of the adhering albumen residues from the yolk, and then it absolutely was weighed. The eggshells were washed with water, dried for 48 h, and weighed (Hossaninejad et al., 2021). Eggshell thickness was measured using a micrometre apparatus (0.001 mm, Model 293‐240; Mitutoyo Co., Ltd., Kanagawa, Japan) at three disparate sites (top, middle, and bottom) were averaged to calculate the overall eggshell thickness.…”

Section: Methodsmentioning

confidence: 99%

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Effect of organic and inorganic manganese supplementation on performance and eggshell quality in aged laying hens

Zarghi

Hassanabadi

Barzegar

2023

Veterinary Medicine & Sci

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Background: Manganese (Mn) is an important trace element for laying hen's nutrition, which is required in small amounts in the diet. Its deficiency results in lowered production performance and eggshell quality.Objectives: This experiment was conducted to investigate the influence of different sources and levels of Mn on egg production performance and eggshell quality in aged laying hens.Methods: A total of 720, 83-week-old Hy-Line W-36 laying hens were fed a non-Mn supplemented basal diet for 4-week (to ime Mn-exhaustion of body) and then were allocated to a completely randomized design with 10 treatments, six replicates and 12 birds each. Concentration of Mn in the non-Mn supplemented basal diet was 10.34 mg/kg (treatment 1), the added doses of dietary Mn were included 30, 60, and 90 mg/kg of three different sources (Mn-oxide, Mn-sulphate, and Mn-organic) for treatments 2-10, respectively. The experiment lasted for 12 week.Results: Dietary supplementation with either organic or inorganic Mn sources significantly enhanced egg production (EP), egg mass (EM), feed conversion ratio (FCR), and relative eggshell weight (RESW) compared with the non-Mn supplemented diet.However, the experimental diets did not influence feed intake (FI), egg weight, and other eggshell quality traits. Based on the broken line regression models, the performance traits were optimized at 30-40 mg/kg Mn concentration when supplemented by Mn-sulphate or Mn-organic. Although, it was 80-90 mg/kg when supplemented by Mn-oxide. The relative bio-efficacy of inorganic Mn sources include Mn-oxide and Mnsulphate in compare with Mn-organic were estimated 45% and 87% (for EP trait), 30% and 94% (for EM trait), 36% and 99% (for FCR trait), and 37% and 78% (for RESW trait), respectively. Conclusions:In the aged laying hens, Mn requirement is higher than the NRC's recommendation. Sulphate and organic sources of Mn are more effective than Mn-oxide.

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\begin{equation*}{\rm{Shape\;index\;}} = \frac{{{\rm{Egg\;width}}}}{{{\rm{Egg\;length}}}}\;\; \times 100.\end{equation*}

…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of organic and inorganic manganese supplementation on performance and eggshell quality in aged laying hens

Zarghi

Hassanabadi

Barzegar

2023

Veterinary Medicine & Sci

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The effect of dietary energy and nutrients density on performance, egg components, egg quality, and profits of Hy-Line W-36 during the peak stage of first laying cycle

Kazemi

Zarghi

Golian

2022

Italian Journal of Animal Science

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Some productive and reproductive performance, eggshell quality, serum metabolites and immune responses due to L‐threonine supplementation in Japanese quail breeders' diet

Omary,

Zarghi,

Hassanabadi

2024

Animal Physiology Nutrition

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A dose‐response experiment was conducted to evaluate the effects of graded levels of dietary digestible threonine (dThr) during the first laying cycle on productive and reproductive performance, egg quality and immune responses of Japanese quail breeders (Coturnix coturnix japonica). Also, dThr requirements were determined based on nutrient dose‐response data. A total of 450 (360 females and 90 males) 11‐week‐old breeders were allocated to five increment (+0.03%) levels of dThr (0.49%, 0.52%, 0.55%, 0.58%, 0.61% and 0.64%) with five replicates per treatment and 15 (12 females and three males) birds each. The experiment lasted for 12 weeks. In response to increasing dietary dThr levels, egg production, egg mass, feed efficiency, egg specific gravity, eggshell relative weight, eggshell thickness, egg fertility (EF) and immune response against sheep red blood cell (SRBC) inoculation were improved with quadratic trends and egg hatchability as set eggs was improved with linear trends. Japanese quail breeders fed a diet with 0.58% dThr concentration (threonine/lysine ratio of 59%) showed the productive performance traits, EF, eggshell quality and immune response against SRBC inoculation in the highest values. However, feed intake, egg weight, egg albumen and yolk relative weight, egg shape index, haugh unit and egg composition were not affected by increasing dietary dThr level. Based on the broken‐line regression model, the dThr requirements to optimize productive performance, eggshell quality, EF and immune response against SRBC inoculation were estimated at 159−188, 169−183, 175 and 178 mg/bird per day, respectively. It is concluded, in the Japanese quail breeders during the first laying phase a daily dThr intake of 188 mg/bird, dietary dThr concentration at 0.58% (threonine/lysine ratio of 59%) is adequate for optimized productive and reproductive performance, eggshell quality and immune responses. The estimated requirements depend on what production parameter is taken into considered for optimization.

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Effect of digestible threonine on performance, egg quality, blood metabolites, and immune responses in laying hens fed a wheat-based diet in the second cycle

Cited by 3 publications

References 38 publications

Effect of organic and inorganic manganese supplementation on performance and eggshell quality in aged laying hens

Effect of organic and inorganic manganese supplementation on performance and eggshell quality in aged laying hens

The effect of dietary energy and nutrients density on performance, egg components, egg quality, and profits of Hy-Line W-36 during the peak stage of first laying cycle

Some productive and reproductive performance, eggshell quality, serum metabolites and immune responses due to L‐threonine supplementation in Japanese quail breeders' diet

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