Sistemas de alimentação e suplementação de farinha de casca de ostras sobre o desempenho e a qualidade da casca dos ovos de poedeiras comerciais

Faria, Douglas Emygdio de; Junqueira, Otto Mack; Sakomura, Nilva Kazue; Santana, Áureo Evangelista

doi:10.1590/s1516-35982000000500018

Cited by 8 publications

(6 citation statements)

References 11 publications

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“…These results are different from Faria et al (2000) e Joly (2003), who found that layer-type chickens had very high egg production during the morning.…”

Section: Resultscontrasting

confidence: 95%

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Production performance and egg quality of quails (Coturnix japonica) during several periods of the day

Pizzolante

Faltarone

Garcia

et al. 2006

Rev. Bras. Cienc. Avic.

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Three experiments were carried out to analyze the performance and egg quality of Japanese quails throughout the day when submitted to different lighting programs. In each experiment, birds were submitted to a period of 28 days for adaptation to the lighting program. During the following three days, each day -from 7 am to 7 pm or 9 pm -was divided into six or seven periods of two hours each, and the remaining hours corresponded to another single period. All birds were submitted to the same management practices, and received water and feed ad libitum. The experimental diet was formulated according to NRC (1994) standards. It was observed lower feed intake in the period of 9 pm to 7 am, and a higher incidence of lay from 3 pm to 7 pm, as opposite to hens, which peak of egg laying occurs during the morning. Some controversial results were found among experiments as to eggshell quality during the different periods of the day. Variation on the lighting program had little influence on the other performance and egg quality parameters.

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“…These results are different from Faria et al (2000) e Joly (2003), who found that layer-type chickens had very high egg production during the morning.…”

Section: Resultscontrasting

confidence: 95%

“…Leeson et al (1991) verified that calcium requirements are generally very low, except at the time eggshell is deposited. Faria et al (2000) observed that commercial layers lay more frequently during the morning, after a period of fasting during the night, when eggshell is formed.…”

Section: Introductionmentioning

confidence: 98%

Production performance and egg quality of quails (Coturnix japonica) during several periods of the day

Pizzolante

Faltarone

Garcia

et al. 2006

Rev. Bras. Cienc. Avic.

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“…Many studies have investigated the use of oystershell waste as construction materials [6][7][8] . Another possibility for reuse of these shells is to use them as supplementary feeding [9][10][11] . Lee and co-workers 12 demonstrated that crushed oyster shells could be used as an alternative liming material to restore soil chemical and microbial properties in upland soil and to increase crop productivity.…”

Section: Introductionmentioning

confidence: 99%

Characterization of calcium carbonate obtained from oyster and mussel shells and incorporation in polypropylene

Hamester¹,

Balzer²,

Becker

2012

Mat. Res.

158

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There is a high content of calcium carbonate in mussel and oyster shells, which can be used in the formulation of medicine, in construction or as filler in polymer materials. This work has as its main objective to obtain calcium carbonate from mussel and oyster shells and used as filler in polypropylene compared their properties with polypropylene and commercial calcium carbonate composites. The shellfish was milling and heated at 500 °C for 2 hours. The powder obtained from shellfish were characterized by scanning electron microscopy (SEM), X-ray fluorescence, particle size distribution and abrasiveness and compared with commercial CaCO 3 and mixed with polypropylene. The thermal and mechanical properties of polypropylene with CaCO 3 obtained from oyster and mussel shells and with commercial CaCO 3 were analysed. The results showed that CaCO 3 can be obtained from oyster and mussel shell and is technically possible to replace the commercial CaCO 3 for that obtained from the shells of shellfish in polypropylene composites.

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“…The results indicate that calcium must be supplemented with sources that have larger particles sizes and are less dusty as compared to standard limestone, particularly during the final stage of the laying cycle, to improve eggshell quality and the skeleton of modern layers. Roland (1986), quoted by Faria et al (2000), published a review on this subject, comparing 44 studies published between 1921 and 1985. That author verified that most results show that replacement of fine particles of calcium carbonate by coarse particles (oyster shell meal or limestone) improve eggshell quality.…”

Section: Introductionmentioning

confidence: 99%

Effects of calcium levels and limestone particle size on the egg quality of semi-heavy layers in their second production cycle

Pizzolante

Saldanha

Laganá

et al. 2009

Rev. Bras. Cienc. Avic.

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A 112-day trial was carried out to evaluate the effect of dietary calcium level and limestone particle size on the egg quality of 288 Hy-Line Brown semi-heavy layers, with 83 weeks of age at the beginning of the experiment. A completely randomized experimental design was applied in a 2x3 factorial arrangement, with two dietary calcium levels (3.5 and 4.0%) e three limestone particle size compositions (100% fine limestone (FL), with 0.185mm; 30% coarse limestone (CL), with 2.83mm, + 70% FL, with 0.185mm; and 50% CL, with 2.83mm, + 50% FL, with 0.185mm), with six replicates of eight birds each. Mean geometric diameter and in-vitro solubility of the limestone sources were, respectively, 0.185mm and 18.7% for the fine limestone, and 2.83mm and 10.5% for the coarse limestone. At the end of each 28-day period, 72 eggs per treatment were used to determine egg specific gravity, yolk percentage, albumen percentage, eggshell percentage, yolk index, Haugh units, eggshell thickness, and eggshell breaking strength. There was no influence of the treatments on the evaluated parameters. It was concluded that feeding the level of 3.5% calcium usually recommended for layers in their first laying cycle, and the substitution of up to 50% fine limestone by coarse limestone in the feed of semi-heavy commercial Hy-Line Brown layers in their second laying cycle can be applied with no impairment of egg quality

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Sistemas de alimentação e suplementação de farinha de casca de ostras sobre o desempenho e a qualidade da casca dos ovos de poedeiras comerciais

Cited by 8 publications

References 11 publications

Production performance and egg quality of quails (Coturnix japonica) during several periods of the day

Production performance and egg quality of quails (Coturnix japonica) during several periods of the day

Characterization of calcium carbonate obtained from oyster and mussel shells and incorporation in polypropylene

Effects of calcium levels and limestone particle size on the egg quality of semi-heavy layers in their second production cycle

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