Exigência nutricional de cálcio e sua biodisponibilidade em alguns alimentos para frangos de corte, no período de 1 a 21 dias de idade

Sá, Luciano Moraes; Gomes, Paulo Cézar; Albino, Luiz Fernando Teixeira; Rostagno, Horácio Santiago; D'Agostini, Priscila

doi:10.1590/s1516-35982004000100020

Cited by 11 publications

(12 citation statements)

References 17 publications

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“…Sá et al (2004) determined 99%relative calcium availability in dicalcium phosphate, 84% in calcitic limestone, and 75% in dolomitic limestone. According to the NRC (1994), calcium bioavailability in dolomitic limestone ranges between 50 and 75%, whereas it is close to 90% in calcitic limestone.…”

Section: Introductionmentioning

confidence: 99%

Effects of dietary calcium levels and limestone particicle size on the performance, tibia and blood of laying hens

Pelícia

Mourao

Garcia

et al. 2011

Rev. Bras. Cienc. Avic.

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A total of 405 23-week-old ISA ® Brown layers were distributed in a completely randomized experimental design in a factorial arrangement with nine treatments consisting of three dietary calcium levels (3.5, 3.75, and 4.5%) and three limestone particle sizes (100% fine limestone (FL), 70% FL + 30% coarse limestone (CL) and 50% (FL) + 50% (CL)), with nine replicates of five birds per cage. The following parameters were evaluated: percentage of lay, defective eggs, egg weight, egg mass, feed intake, feed conversion ratio (per kg eggs and per dozen eggs), and mortality. Dietary Ca levels significantly affected lay, with birds fed diets containing 4.5% calcium producing less eggs as compared to those fed 3.0 and 3.75% Ca. Egg production linearly decreased as dietary Ca levels increased, but blood Ca levels (mg/L) increased in 28-week-old birds. The interaction of dietary Ca levels and limestone particle sizes resulted in a reduction in tibial ash Ca content as dietary Ca levels increased and as fine limestone was replaced by coarse limestone. It is concluded that a dietary Ca level of 3.75% and 100% fine particle limestone are required to maintain adequate egg production and available Ca blood level. INTRODUCTIONCalcium is the mineral with the highest concentration in the body of poultry, consisting of 1.5% of its body weight. It is more than one third of total mineral body content of an adult bird (Klasing, 1998) and represents one third of eggshell components.During lay, structural bone loss (medullary and cortical) and the subsequent development of osteoporosis are associated to the medullary bone. Medullary bones in females are shaped in response to estrogen. The role of these bones in mineral homestasis is more important than their structural skeletal function, and it is associated to bone mineralization and eggshell formation. Studies on layer skeleton using fluorochrome (Cransberg et al., 2001) showed that there is no formation of medullary or cortical bone during eggshell formation; only the shape of medullary bones are changed. However, the high mobilization of minerals for eggshell deposition may result in osteoporosis and consequently, in bone fragility.Calcium has an essential role in nutrition and calcium turnover determines the optimal calcium level for bone formation, including the tíbia, but the relationship between calcium turnover and the development of osteoporosis is still not clear (Cransberg et al., 2001

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Section: Introductionmentioning

confidence: 99%

Effects of dietary calcium levels and limestone particicle size on the performance, tibia and blood of laying hens

Pelícia

Mourao

Garcia

et al. 2011

Rev. Bras. Cienc. Avic.

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“…There are several studies in literature on the calcium requirements of broilers during the starter rearing phase (Alves et al, 2002;Araújo et al, 2002;Sá et al, 2004;Santos et al, 2011;Tancharoenrat & (Alves et al, 2002), calcium citrate-malate (Henry et al, 2002), and calcitic and dolomitic limestone (Sá et al, 2004). On the other hand, to the best of our knowledge, no studies on the use of firewood ash as a calcium source for broilers were published.…”

Section: Introductionmentioning

confidence: 99%

Firewood Ash as Calcium Source in the Initial Diet of Broiler Chickens

Saccomani

De²,

França

et al. 2016

Rev. Bras. Cienc. Avic.

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Alternative feedstuff, bone development, calcium source, performance, poultry. ABSTRACTThis experiment aimed to evaluate the utilization of firewood ash as calcium source in the initial diet of broiler chickens. One hundred and twenty eight broiler chickens of Cobb-500® strain, from 1 to 21 days of age, were randomly distributed in four treatments with four repetitions of eight birds each, been four female and four male. The experimental diets were corn-soybean based, been isoenergetic and isonutrients, and had 0, 0.32, 0.98 and 1.27% of firewood ash as calcium source. The firewood ash utilized had 23.8% of calcium, 0.39% of total phosphorus, and 0.11% of sodium. The experimental treatments did not influence the feed intake, body weight, body weight gain, and food conversion from 1 to 7, 1 to 14, and 1 to 21 days of age. The tibia and femur thickness and length at 21 days of age were not altered by treatments. It was concluded that the firewood ash can be used as calcium sourcereplacing limestone in the initial diet of broiler chickens, without change the performance and the bone development.

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“…O cálcio é requerido pelas aves para formação e manutenção da estrutura óssea, adequado crescimento e utilização eficiente dos alimentos, formação da casca do ovo, transmissão de impulsos nervosos, coagulação sanguínea, contração muscular, ativador de sistemas enzimáticos e envolvimento com a secreção de diferentes hormônios (VARGAS JUNIOR et al, 2003;SÁ et al, 2004).…”

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Níveis de cálcio no desempenho de machos reprodutores de corte com e sem crista

et al. 2010

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O objetivo deste experimento foi avaliar o efeito do nível de cálcio na dieta sobre o peso corporal e as variáveis reprodutivas (volume de sêmen, número de células espermáticas e fertilidade) em reprodutores de corte machos com ou sem crista. Foram utilizados 32 machos Cobb 500, 50% com crista inteira e 50% sem crista. O delineamento experimental utilizado foi o inteiramente casualizado, com esquema fatorial 2x2, duas condições de crista (com e sem) e dois níveis de cálcio (0,90 e 1,35%). O sêmen foi coletado pelo método americano, e o número de células espermáticas foi determinado em câmara de Neubauer. Na 42ª, na 43ª e na 44ª semana de idade dos machos, 48 fêmeas para cada tratamento foram inseminadas artificialmente. As inseminações foram realizadas duas vezes por semana, com sêmen fresco, na dose de 0,05mL. Depois de 21 dias de incubação, os ovos não eclodidos foram quebrados e examinados macroscopicamente para análise da fertilidade. Os machos alimentados com 0,90 e 1,35% de cálcio nas dietas tiveram pesos similares. Além disso, na 31ª semana de idade, machos com crista que receberam dietas com 0,90% de cálcio apresentaram maior número de células espermáticas (3,00x10(6) 0,90% com crista contra 9,46x10(5) 0,90% sem crista). O nível de cálcio de 0,90% foi suficiente para promover um bom desempenho reprodutivo em reprodutores de corte machos. Machos com crista inteira tiveram melhor fertilidade que os demais machos sem crista.

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Exigência nutricional de cálcio e sua biodisponibilidade em alguns alimentos para frangos de corte, no período de 1 a 21 dias de idade

Cited by 11 publications

References 17 publications

Effects of dietary calcium levels and limestone particicle size on the performance, tibia and blood of laying hens

Effects of dietary calcium levels and limestone particicle size on the performance, tibia and blood of laying hens

Firewood Ash as Calcium Source in the Initial Diet of Broiler Chickens

Níveis de cálcio no desempenho de machos reprodutores de corte com e sem crista

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