Raw Rock Phosphate as a Phosphorus Supplement for Growing Pullets and Layers

Said, N. W.; Sunde, M. L.; Bird, H. R.; Suttie, John W.

doi:10.3382/ps.0581557

Cited by 10 publications

(7 citation statements)

References 3 publications

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“…Albumen F levels for all treatment groups averaged 1 ppm or less; only the 1300-ppm F group was significantly higher from other treatments. Similar low levels of F in albumen have been reported by Said et al (1976). Fluoride tended to accumulate in egg shell at a much higher rate than in the yolk or albumen as reported by Kuhl and Sullivan (1976) and Van Toledo (1978).…”

Section: Resultssupporting

confidence: 87%

Effect of Dietary Fluoride and Aluminum on Laying Hen Performance and Fluoride Concentration in Blood, Soft Tissue, Bone, and Egg

Hahn

Guenter

1986

Poultry Science

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Changes in laying-hen performance due to the effect of graded levels of dietary fluoride (F) have been documented earlier. The present study examined the effect of dietary F and aluminum (Al) on laying hen performance, and F levels in plasma, soft tissues, muscle, bone, and eggs. Two hundred and seventy Single Comb White Leghorn (SCWL) layers were fed a basal diet containing the following F and Al levels: control; 100 ppm F; 80 ppm Al; 100 ppm F/80 ppm Al; 100 ppm F/40 ppm Al; 1300 ppm F; 1040 ppm Al; 1300 ppm F/1040 ppm Al, and 1300 ppm F/520 ppm Al. After 112 days of feeding, the blood, tissue, bone, and egg samples were collected for analysis. High F intake significantly depressed feed intake and hen-day production and elevated serum, tissue, bone, and egg F levels. Dietary Al minimized the effect of high fluoride feeding. The mean fluoride concentration for low (80 ppm Al diet) vs. high F (1300 ppm) intake was, respectively: plasma, .2 vs. 10.1 ppm; liver, 4.5 vs. 19.2 ppm; kidney, 2.9 vs. 31.8 ppm; pectoralis muscle, 3.6 vs. 6.7; tibia muscle homogenate, 3.9 vs. 21.1 ppm, and bone, 611 vs. 2600 ppm. The majority of the F transferred to the egg was incorporated into the shell (2.8 to 307.1 ppm). Low F levels were found in albumen (fresh, .4 to 1.0 ppm) and yolk (dry fat free, 3.1 to 18.4 ppm). The data suggested that dietary F is readily accumulated in bone and kidney; however, liver and muscle are less responsive.(ABSTRACT TRUNCATED AT 250 WORDS)

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Section: Resultssupporting

confidence: 87%

Effect of Dietary Fluoride and Aluminum on Laying Hen Performance and Fluoride Concentration in Blood, Soft Tissue, Bone, and Egg

Hahn

Guenter

1986

Poultry Science

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“…No significant (P>.05) treatment differences were observed in this parameter nor in albumen quality (Haugh units). This is in agreement with the results of Said et al (1979), who did not find any effects in shell and interior egg quality of hens fed diets containing 216 to 648 mg/kg F~ from added raw rock phosphate during 1 yr, and of Merkley (1981), who did not find differences in egg quality in laying hens given drinking water with 300 mg/kg F~ (from NaF) for 20 wk and 100 mg/kg for 25 wk. In contrast, Guenter (1979) observed that shell thickness was reduced in birds fed 200 mg/kg F" (NaF), but at 100 ppm, elasticity and shell thickness were increased, as represented by a decrease of cracked shells.…”

Section: Egg Qualitysupporting

confidence: 91%

“…According to some sources, dietary fluorine tolerance for laying hens is 400 mg/kg (as NaF) (National Research Council, 1974;Underwood, 1983), but others (National Research Council, 1980) state 200 mg/kg as the maximum tolerable level. When fluoride is in form of rock phosphate, significant depression in egg production has been reported with levels as low as 216 mg/kg (Said et al, 1979).…”

Section: Introductionmentioning

confidence: 99%

Bioavailability of Fluorine in Sepiolite for Laying Hens

Nogareda¹,

Brufau²,

Pérez-Vendrell³

et al. 1990

Poultry Science

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The purpose of the present work was to compare the bioavailability of structural fluorine contained in sepiolite and in sodium fluoride for laying hens. Three hundred 27-wk-old laying hens were fed one of three diets: 1) a control based on corn, barley, and soybean meal containing 21 mg/kg of fluorine; 2) a sepiolite diet in which 2% sepiolite replaced 2% barley in the control diet and which contained 217 mg/kg of fluorine; and 3) a NaF diet, consisting of the same control diet to which NaF was added to contain 217 mg/kg of fluorine (the same level of F- as the sepiolite diet). The experiment ended when hens were 64 wk old. Fluorine concentration in the tibial bone of hens fed the NaF diet was four times higher than in the control, and twice as high in eggshell. In contrast, hens fed sepiolite had fluorine concentrations in tibial bone and eggshell not significantly higher than fluorine concentrations in the controls. These results indicate that fluorine from sepiolite was not available. The effects of the different diets on egg production, feed intake, feed conversion, egg weight, shell and interior egg quality, dry matter of feces, and body weight gain were also determined but no significant differences due to the dietary treatment were observed.

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“…Em outro trabalho, Rama Rao & Reddy (2003) avaliaram diversas fontes de fósforo e observaram diminuição no consumo entre as poedeiras alimentadas com rações com elevados níveis de flúor, o que diminuiu a produção de ovos. Os autores ressaltaram que, apesar da diminuição no consumo, a qualidade da casca não foi afetada, confirmando resultados obtidos por Said et al (1979) e Van Toledo & Combs (1984). Os resultados encontrados neste estudo diferem parcialmente dos relatados por esses autores, provavelmente em decorrência da menor concentração de flúor nos fosfatos avaliados por esses autores.…”

Section: Resultsunclassified

Uso de fosfatos com diferentes relações flúor: fósforo na alimentação de poedeiras semipesadas na fase de produção

Araujo¹,

Araújo

Junqueira

et al. 2009

R. Bras. Zootec.

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RESUMO -Um experimento foi conduzido para verificar os efeitos de diferentes relações flúor:fósforo (F:P) na dieta sobre o desempenho e as concentrações de cálcio, fósforo, magnésio e flúor na tíbia de poedeiras comerciais semipesadas. Foram utilizadas 160 galinhas poedeiras, distribuídas em delineamento inteiramente casualizado, com quatro tratamentos (fontes de fósforo com diferentes relações flúor:fósforo -1:40; 1:60; 1:80; 1:100) e cinco repetições de oito aves. No final do experimento, foram abatidas duas aves de cada repetição para coleta da tíbia e análise dos teores de flúor, cálcio, fósforo e magnésio. As relações flúor:fósforo não afetaram o consumo de ração, a produção de ovos, a conversão alimentar, o peso dos ovos e a gravidade específica. Entretanto, a porcentagem de casca e a espessura da casca foram menores quando a relação F:P foi de 1:100. Apesar da ausência de efeitos na produção de ovos, verificou-se redução de 7,3; 5,4 e 9,8% na produção entre as aves que receberam ração com a maior relação F:P (1:100) em comparação àquelas alimentadas com as rações com as relações de 1:40; 1:60 e 1:80, respectivamente. A deposição óssea de flúor reduziu e a de magnésio aumentou nas aves alimentadas com a ração contendo as maiores relação de F:P. As fontes de fósforo, nas relações fluor:fósforo de 1:40 a 1:80, podem ser utilizadas em dietas para poedeiras comerciais, pois não afetam o desempenho e a qualidade da casca dos ovos. Palavras-chave: desempenho, fontes de fósforo, minerais ósseos, qualidade de cascaUse of phosphates with different fluorine:phosphorus ratios in diets for brown egg layer hens ABSTRACT -One experiment was conducted to evaluate the effect of different dietary fluorine:phosphorus (F:P) ratios on the performance and bone parameters of layer hens. One hundred and sixty layer hens were randomly allotted to an experimental design with four treatments (phosphorus sources with different F:P ratios -1:40, 1:60, 1:80, 1:100) with five replicates of eight layers each. At the end of the experiment, two birds per replicate were slaughtered and their tibias were collected to assess the fluorine, calcium, phosphorus and magnesium contents. The different F:P ratios did not affect the feed intake, egg production, feed conversion, egg weight and specific gravity. However, shell percentage and shell thickness were lower when the F:P ratio was 1:100. Despite the absence of effects on egg production, reductions of 7.3, 5.4 and 9.8% were verified among birds that received diets with higher F:P ratios (1:100) in relation to those fed with diets with 1:40, 1:60 and 1:80 ratios, respectively. The fluorine bone deposition decreased and that of magnesium increased in birds fed diets with the highest F:P ratios. P sources with F:P ratios of 1:40 and 1:80 may be used in diets for commercial layer hens, since they do not affect their performance and egg shell quality.

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Raw Rock Phosphate as a Phosphorus Supplement for Growing Pullets and Layers

Cited by 10 publications

References 3 publications

Effect of Dietary Fluoride and Aluminum on Laying Hen Performance and Fluoride Concentration in Blood, Soft Tissue, Bone, and Egg

Effect of Dietary Fluoride and Aluminum on Laying Hen Performance and Fluoride Concentration in Blood, Soft Tissue, Bone, and Egg

Bioavailability of Fluorine in Sepiolite for Laying Hens

Uso de fosfatos com diferentes relações flúor: fósforo na alimentação de poedeiras semipesadas na fase de produção

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