Alternative Feeding Regimen of Calcium Source and Phosphorus Level for Better Eggshell Quality in Commercial Layers

Ahmad, H. A.; Balander, R. J.

doi:10.1093/japr/12.4.509

Cited by 28 publications

(15 citation statements)

References 19 publications

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“…Moreover, did not observe any effect on productivity when 33% fine LIM was substituted with oyster shell in the diets of SCWL hens from 38 to 62 wk of age, which contained 3.0, 3.5, or 4.0% total Ca. In contrast, Ahmad and Balander (2003) reported that the replacement of 50% LIM with oyster shell significantly improved egg production in SCWL hens from 28 to 64 wk of age. However, the increase in egg production observed in this trial was only 0.8 percentage units.…”

Section: Productive Performance and Egg Qualitymentioning

confidence: 87%

Productive Performance and Egg Quality of Brown Egg-Laying Hens in the Late Phase of Production as Influenced by Level and Source of Calcium in the Diet

et al. 2008

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A total of 1,152 Lohmann Brown laying hens were used to study the influence of level (3.5 and 4.0%) and source (coded FIN, COA, and OYS) of Ca in the diet on productive performance and egg quality from 58 to 73 wk of age. The FIN diet contained all the Ca carbonate as fine limestone (LIM). In the COA and OYS diets, 40% of the fine LIM was substituted with either coarse LIM or oyster shell. Each treatment was replicated 8 times (24 hens). Productive performance and egg quality traits were recorded every 4 wk, and tibia characteristics and shell quality traits were determined at 73 wk of age. An increase in Ca intake from 4.08 to 4.64 g/hen per day improved egg production (71.2 vs. 74.9%; P < 0.001), egg mass (49.0 vs. 51.4 g; P < 0.05), and feed conversion ratio (2.43 vs.2.30 kg of feed/kg of egg; P < 0.001). In addition, an increase in Ca intake improved shell weight (9.98 vs. 10.20%; P < 0.05), shell thickness (0.342 vs. 0.351 mm; P < 0.01), and shell density (82.0 vs. 83.8 mg/cm 2 ; P < 0.001). Calcium source had no effect on productive performance, tibia characteristics, or egg quality except for shell density, which was greater for hens fed COA than for hens fed FIN, with hens fed OYS being intermediate (81.9 vs. 84.0 vs. 82.7 mg/cm 2 , respectively; P < 0.05). It was concluded that Brown egg-laying hens in the late phase of production require more than 3.5% Ca in the diet (4.08 g of Ca/hen per day) and that the substitution of 40% of fine LIM with COA or OYS does not affect productive performance and has little impact on shell quality and tibia characteristics.

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Section: Productive Performance and Egg Qualitymentioning

confidence: 87%

Productive Performance and Egg Quality of Brown Egg-Laying Hens in the Late Phase of Production as Influenced by Level and Source of Calcium in the Diet

et al. 2008

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“…Egg production and eggshell quality data recorded on individual basis at 54, 58, 62 and 70 weeks of age were pooled to calculate and statistical analyzed parameter means for the late production period. Daily egg numbers were recorded during the mentioned weeks and hen-day egg production (Ahmad & Balander, 2003) was calculated and expressed as mean egg production (%). Individual egg weights were recorded for all eggs produced and used to calculate mean egg weight for the experimental period.…”

Section: Methodsmentioning

confidence: 99%

“…Washed shells were allowed to dry for an hour at room temperature, before eggshell thickness measurements were conducted. A micrometer (0.01 mm) was used to make three shell thickness measurements per measurement point on the blunt end, equator and sharp end of individual eggs, resulting in a total of nine measurement readings per egg (Ehtesham & Chowdhury, 2002;Ahmad & Balander, 2003). After recording eggshell thickness, individual shells were stored for the determination of dry shell weight and shell ash content (Clunies et al, 1992).…”

Section: Methodsmentioning

confidence: 99%

Effect of limestone particle size on egg production and eggshell quality of hens during late production

et al. 2010

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________________________________________________________________________________ AbstractA study was conducted to determine the influence of different particle size limestone in layer diets on egg production and eggshell quality during the later stages of egg production (>54 weeks of age). Calcitic limestone (360 g Ca/kg), consisting of small (<1.0 mm), medium (1.0 -2.0 mm) and large (2.0 -3.8 mm) particles were obtained from a specific South African source that is extensively used in poultry diets Isoenergetic (14.32 MJ AME/kg DM) and isonitrogenous (172.01 g CP/kg DM) diets with a dietary Ca content of 39.95 g Ca/kg DM were used. Sixty nine, individual caged Lohmann-Silver pullets, 17 weeks of age, were randomly allocated to the three treatments (n = 23) for the determination of various egg production and eggshell quality characteristics. Egg production and eggshell quality data recorded on individual basis at 54, 58, 64 and 70 weeks of age were pooled to calculate and statistical analysed parameter means for the late production period. Different limestone particle sizes had no effect on any of the tested egg production and eggshell quality parameters. These results suggested that larger particles limestone are not necessarily essential to provide sufficient Ca 2+ to laying hens for egg production and eggshell quality at end-of-lay, provided that the dietary Ca content satisfies the requirements of the laying hen.________________________________________________________________________________

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“…In a review, Roland Sr [123] concluded that about half the studies comparing ground limestone to large-particle oyster shell found that oyster shell resulted in better eggshell quality, whereas other studies found that eggshell quality was not affected. Ahmad and Balander [124] evaluated the effects of calcium source, phosphorus level and feeding time on eggshell quality, egg production and weight. Partial (50%) replacement of limestone with oyster shell as the calcium source in the evening feed of laying hens was helpful in improving eggshell quality and hen-day egg production.…”

Section: Calcium Supplementsmentioning

confidence: 99%

Bivalve Shell: Not an Abundant Useless Waste but a Functional and Versatile Biomaterial

Yao

Xia

et al. 2014

Critical Reviews in Environmental Science and Technology

154

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Running title: Bivalve shell-a functional and versatile biomaterialBivalve shells, available in abundance, have no eminent use and are commonly regarded as waste.Their improper disposal causes a significant level of environmental concern and also results in a waste of natural resources. Bivalve shell is formed by biomineralization and consists mainly of CaCO 3 with a small amount of organic matrix, giving it a potential for use as raw material.Recycling shell waste could potentially eliminate the disposal problem, and also turn an otherwise useless waste into high value-added products. The present review first describes the microstructure and physicochemical properties of bivalve shell, then focuses on its current Downloaded by [Florida International University] at 15:37 30 August 2014 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2 applications. Finally, the current status of bivalve shell studies and directions for future research are considered.

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Alternative Feeding Regimen of Calcium Source and Phosphorus Level for Better Eggshell Quality in Commercial Layers

Cited by 28 publications

References 19 publications

Productive Performance and Egg Quality of Brown Egg-Laying Hens in the Late Phase of Production as Influenced by Level and Source of Calcium in the Diet

Productive Performance and Egg Quality of Brown Egg-Laying Hens in the Late Phase of Production as Influenced by Level and Source of Calcium in the Diet

Effect of limestone particle size on egg production and eggshell quality of hens during late production

Bivalve Shell: Not an Abundant Useless Waste but a Functional and Versatile Biomaterial

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