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, Vahid; Zarghi, Heydar; Golian, Abolghasem

doi:10.1080/1828051x.2022.2090287

Cited by 2 publications

(2 citation statements)

References 31 publications

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“…To assist in choosing a suitable model, coefficient of determination (R 2 ), adjusted R 2 (adj. R 2 ), root means square error (RMSE), and Akaike's information criterion (AIC) values were calculated using the following formulas (Kazemi et al, 2022):…”

Section: Discussionmentioning

confidence: 99%

“…To assist in choosing a suitable model, coefficient of determination ( R 2 ), adjusted R 2 (adj. R 2 ), root means square error (RMSE), and Akaike's information criterion (AIC) values were calculated using the following formulas (Kazemi et al., 2022):

\begin{equation*}Y = L + U \times \left( {{\rm{R}} - {\rm{X}}} \right) \times I,\end{equation*}

\begin{equation*}Y = L + U \times {\left( {R - X} \right)^2} \times I,\end{equation*}

\begin{equation*}{\rm{\;}}{R^2} = \frac{{\left( {{\rm{corrected\;total\;sum\;of\;squares}} - {\rm{sums\;of\;squares\;for\;error}}} \right)}}{{{\rm{corrected\;total\;sum\;of\;squares}}}}\;,\end{equation*}

$$\begin{eqnarray}{\rm{Adjusted\;}}{R^2} &=& 1 - \left[ {\frac{{{\rm{sums\;of\;squ...

…”

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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Section: Discussionmentioning

confidence: 99%

“…To assist in choosing a suitable model, coefficient of determination ( R 2 ), adjusted R 2 (adj. R 2 ), root means square error (RMSE), and Akaike's information criterion (AIC) values were calculated using the following formulas (Kazemi et al., 2022):

\begin{equation*}Y = L + U \times \left( {{\rm{R}} - {\rm{X}}} \right) \times I,\end{equation*}

\begin{equation*}Y = L + U \times {\left( {R - X} \right)^2} \times I,\end{equation*}

\begin{equation*}{\rm{\;}}{R^2} = \frac{{\left( {{\rm{corrected\;total\;sum\;of\;squares}} - {\rm{sums\;of\;squares\;for\;error}}} \right)}}{{{\rm{corrected\;total\;sum\;of\;squares}}}}\;,\end{equation*}

$$\begin{eqnarray}{\rm{Adjusted\;}}{R^2} &=& 1 - \left[ {\frac{{{\rm{sums\;of\;squ...

…”

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

Self Cite

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The Chemical Composition of Soyhulls and Their Effect on Amino Acid and Nutrient Digestibility in Laying Hens during the Peak of Production

Shuaib,

Paneru,

Hafeez

et al. 2023

Animals

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This study investigates the chemical composition of soyhulls (SHs) as an alternative feed ingredient and their effect on nutrient and amino acid (AA) digestibility in laying hens during peak production. A total of 200 golden brown hens (28 weeks old) were subjected to random allocation across 5 dietary treatments: a corn–soybean meal (SBM) reference diet and 4 test diets with 25% SHs from different mills (SH1, SH2, SH3, and SH4). Each treatment was replicated four times with ten birds per replicate. Digesta samples were collected during three phases (28–32, 32–36, and 36–40 weeks of age) to measure apparent metabolizable energy (AME), the apparent ileal digestibility (AID) of nutrients, and the standard ileal digestibility (SID) of AAs. The SBM diet had 30.0% crude protein (CP) and 3.78% crude fiber (CF), while the SH diets had 21.0 to 21.5% CP and 11.6% CF. The findings revealed that the AME was lower (p < 0.05) with SH diets (2404 kcal/kg) compared to the SBM diet (2627 kcal/kg) in all three phases. The SH diets had a lower AID of dry matter (DM), crude protein (CP), ash, ether extract (EE), and crude fiber (CF) than the SBM diet by an average of 2.88, 2.25, 4.93, 4.99, and 3.36%, respectively. The AID of nitrogen-free extract (NFE) was higher in the SH diets than the SBM diet by 3.42% in all three phases (p < 0.05). The SH diets had lower uric acid excretion (about 66.93 mg/100 mL) than the SBM diet (about 76.43 mg/100 mL) on average in all three phases. The SH diets had a lower SID of arginine, histidine, isoleucine, lysine, cysteine, valine, and tyrosine than the SBM diet by 2 to 10%, while the SID of methionine was higher in the SH diets than the SBM diet by 2.2% on average in all three phases (p < 0.05). The SH from Sadiq Brother Feed (SH1) had the highest AME and AID of DM, ash, CP, EE, CF, and the SID of AA among the SH diets. These results indicate that SH can partially replace SBM in laying hen diets, but the source and quality of SH should be considered.

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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

Cited by 2 publications

References 31 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 Chemical Composition of Soyhulls and Their Effect on Amino Acid and Nutrient Digestibility in Laying Hens during the Peak of Production

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