Dynamics of serum phosphorus, calcium, and hormones during egg laying cycle in Hy-Line Brown laying hens

Ren, Zhouzheng; Sun, Wenqiang; Liu, Yan Li; Li, Zhipeng; Han, Di; Cheng, Xi; Yan, Jiakun; Yang, Xiaojun

doi:10.3382/ps/pey572

Cited by 17 publications

(14 citation statements)

References 34 publications

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“…A difference in the Ca:P ratio was also noted in the femurs between RIR and Leghorn birds, although Ca and P were at a similar level in the studied breeds. It should be noted, however, that in our study the Ca:P ratio in the bones fell within the normal range of 2:1 (Thorp and Waddington, 1997;Ren et al, 2019).…”

Section: Discussioncontrasting

confidence: 55%

A Comparison of Morphometric Indices, Mineralization Level of Long Bones and Selected Blood Parameters in Hens of Three Breeds

Skomorucha

Sosnówka-Czajka

2021

Annals of Animal Science

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The aim of the study was to compare morphometric indices and the mineralization level of humerus, femur and tibia in Leghorn (H-22), Sussex (S-66) and Rhode Island Red (R-11) hens at different age (weeks 6., 16., 45. and 64.), as well as some blood parameters. The material for the experiment was one-day old chicks of breeds: Leghorn (H-22), Sussex (S-66) and Rhode Island Red –RIR (R-11), which were separated into three groups. At 6, 16, 45 and 64 weeks of the study, 10 birds selected from each group were weighed, slaughtered, and their right femurs, tibiae and humeri were dissected. After removing soft tissues, the bones were weighed and measured for length, diameter, and the Seedor index (SI) was calculated. The bones were analysed for the content of calcium (Ca), phosphorus (P) and crude ash (CA). At 64 weeks, blood was collected from the hens and analysed for the concentration of Ca, P, pyridinoline and deoxypyridinoline. The study showed that hen breed had an effect mostly on morphometric indices of the bones such as bone weight and diameter, and the Seedor index (SI), while the age of birds had an effect on the bone mineralization level up to 45 weeks of age. The bone mineralization did not decrease in the studied breeds of hens at the end of the laying period. It was also found that heavier birds (RIR) had greater diameter bones and a higher SI, but the content of ash and minerals in the bones of that breed was generally similar to the Leghorn and Sussex hens. RIR hens exhibited higher phosphorus plasma concentration compared to Sussex hens. This may suggest that RIR birds have a slightly stronger bone system compared to Leghorn and Sussex hens.

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Section: Discussioncontrasting

confidence: 55%

A Comparison of Morphometric Indices, Mineralization Level of Long Bones and Selected Blood Parameters in Hens of Three Breeds

Skomorucha

Sosnówka-Czajka

2021

Annals of Animal Science

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“…The relative higher serum Ca and P levels in light period compared to the dark period indicated that there is a circadian rhythm in the blood Ca and P levels. This result was in line with the previous results [51,52]. Parsons and Combs (1981) [51] reported that blood Ca 2+ concentration varies with the egg position in the oviduct, reaches the maximum level following oviposition and drops until an uncalci ed egg entered the shell gland.…”

Section: Prolonged Dark Period Improves Eggshell Quality By Elevatingsupporting

confidence: 92%

“…The daily change of blood P, however, has different reports. The blood P follows a pattern opposite that of Ca [51] or shows a similar trend as blood Ca [52]. Except of the daily egg cycle, blood Ca 2+ and P levels are related to the light-dark cycle or feed intake.…”

Section: Prolonged Dark Period Improves Eggshell Quality By Elevatingmentioning

confidence: 89%

Prolonged Dark Time Within A 24-h Light Regime Improves Eggshell Quality by Enhancing Calcium Deposition in Laying Hens

Qian

Zhao

Jiao

et al. 2020

Preprint

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Background: The absorption and transportation of calcium and phosphorus is mainly relied on their corresponding transporters. Eggshell is mainly formed during dark time in one egg cycle. The aim of this study was to determine the effect of different light regime on eggshell quality and the expression of the relevant calcium and phosphorus transporters in laying hens. Seventy two 56-week-old laying hens were randomly divided into two groups and subjected to the following treatments: 16 h light: 8 h dark (control) and 9 h light: 15 h dark (LDP). The expression of phosphorus transporters type IIb Na/Pi co-transporter NaPi-IIa (NPt2a) and NaPi-IIb (NPt2b), calcium transporter calbindin-D28k (CaBP-D28k), and plasma membrane Ca ATPase 1b (PMCA1b) were measured in small intestine, kidney, and eggshell gland. Results: The results showed that the feed intake (P < 0.001) and egg weight (P = 0.05) was decreased by LDP treatment, while laying rate, egg production, and feed efficiency were not significantly influenced (P > 0.05). Compared to control, eggshell hardness was increased (P < 0.05) by LDP treatment whereas eggshell thickness and eggshell percentage were not significant changed. Eggshell calcium (Ca) and phosphorus (P) contents were elevated in LDP-hens, compared to control birds. Compared to control birds, serum Ca (P < 0.01) and P levels (P = 0.079) at dark time were increased in LDP-hens while and alkaline phosphatase (ALP) activity was lowered (P < 0.05). The protein expression levels of CaBP-D28k and PMCA1b were not influenced in duodenum but were decreased at light time in jejunum of LDP hens. In kidney, the expression of CaBP-D28k, PMCA1b and NPt2a were not changed by LDP treatment. In eggshell gland, however, the expression of CaBP-D28k and osteopontin (OPN) were relative higher in LDP hens compared to control birds, whereas the PMCA1b expression was not altered. Conclusions: The result indicates that the increased circulating Ca and P concentrations in dark time are favorable for the deposition of calcium and phosphorus in eggshell. The result offers an alternative strategy for the laying hen with a worse eggshell problem.

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“…This would also explain why we observed no consistent differences in plasma hormone levels ( Table 3 ; alkaline phosphatase, calcitonin, PTH, and 1,25-(OH) 2 -D 3 ) and intestinal gene expressions (NaPi-IIb and CaBP-D28k). In future laying hen phosphorus nutrition studies, the serum phosphorus (and hormone) dynamics during the egg-laying cycle will need to be illustrated ( Ren et al., 2019 ), and the optimal sample-collecting time points will need to be investigated.…”

Section: Resultsmentioning

confidence: 99%

The adaptability of Hy-Line Brown laying hens to low-phosphorus diets supplemented with phytase

et al. 2020

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Body phosphorus homeostasis network allows laying hens to adapt to wide range of changes in dietary phosphorus levels. Phytase hydrolyzes phytate rendering phosphorus and reduces the laying hens' requirements for inorganic phosphate rock. Here, we demonstrate that there is no need to keep large safety margins in dietary phosphorus when hens are fed with phytase. Hy-Line Brown laying hens (n = 504) were randomly assigned to 7 treatments (6 replicates of 12 birds). A corn-soybean meal–based diet, with no inorganic phosphate rock, was formulated to contain 0.12% nonphytate phosphorus ( nPP ), 3.8% calcium, and 2,000 FTU/kg phytase. Inorganic phosphate rock (di-calcium phosphate) was supplemented into the basal diet to create 6 other diets containing 0.17, 0.22, 0.27, 0.32, 0.37, and 0.42% nPP. Levels of calcium carbonate and zeolite powder were adjusted to make sure all the 7 experimental diets contained the same nutrition levels (including calcium and phytase) except nPP. The diets were subjected to laying hens from 29 to 40 wk of age. As a result, when supplemented with 2,000 FTU/kg phytase, extra supplementation of inorganic phosphate rock had no effects ( P > 0.05) on serum phosphorus levels, serum calcium levels, laying performance (laying rate, egg weight, feed intake, feed-to-egg ratio, and unqualified egg rate), egg quality (shell thickness, shell strength, albumen height, yolk color, and Haugh unit), and tibia quality parameters (breaking strength and ash, calcium, and phosphorus contents). Extra supplementation of inorganic phosphate rock linearly increased ( P < 0.01) fecal phosphorus excretion and linearly decreased ( P = 0.032) the apparent metabolizability of dietary phosphorus. While serum hormones and intestine gene expressions were varied within treatments, no consistent changes were found. In conclusion, the supplementation of inorganic phosphate rock (provided 0.05–0.30% extra nPP) to phytase-containing basal diets (2,000 FTU/kg; nPP = 0.12%) provided limited benefits to egg production performance in laying hens from 29 to 40 wk of age. Further investigating the body phosphorus homeostasis would help to understand the nutritional and physiological reasonability of formulating low-phosphorus diets in the laying hen industry.

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Dynamics of serum phosphorus, calcium, and hormones during egg laying cycle in Hy-Line Brown laying hens

Cited by 17 publications

References 34 publications

A Comparison of Morphometric Indices, Mineralization Level of Long Bones and Selected Blood Parameters in Hens of Three Breeds

A Comparison of Morphometric Indices, Mineralization Level of Long Bones and Selected Blood Parameters in Hens of Three Breeds

Prolonged Dark Time Within A 24-h Light Regime Improves Eggshell Quality by Enhancing Calcium Deposition in Laying Hens

The adaptability of Hy-Line Brown laying hens to low-phosphorus diets supplemented with phytase

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