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Assessing bone mineral density, eggshell characteristics and their relationship at peak egg production of laying hens in response to various levels of vitamin C Rev. Bras. Ciênc. Avic.
Saki,AA; Rahmati,MMH; Eskandarlou,A; Zamani,P; Hosseini Siyar,SA.
In this study, the effects of the inclusion of different vitamin C levels in the diet on bone mineral density (BMD) and eggshell quality was determined. Four experimental diets with four levels of vitamin C (0, 250, 500 and 750 mg/kg) were used. During the experiment, environmental temperature and humidity were 19±1°C and 55±5% respectively. Correlation coefficients of BMD index and shell characteristics with production parameters were also determined. Egg weight, egg mass, hen-day egg production and eggshell quality were not significantly influenced by vitamin C levels. BMD was not affected by vitamin C utilization. A positive correlation was observed between BMD and egg weight and hen-day egg production. A significant positive correlation between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone mineralization; Egg quality; Layer hen; Vitamin C.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000300007
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Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment R. Bras. Zootec.
Tizziani,Tarciso; Donzele,Rita Flávia Miranda de Oliveira; Donzele,Juarez Lopes; Balbino,Eric Márcio; Silva,Amanda Dione; Figueiredo,Érika Martins de; Muniz,Jorge Cunha Lima; Jacob,Rodrigo de Freitas.
ABSTRACT This study was conducted to evaluate the effect of reduction of the available phosphorus (avP) in diets supplemented with 500 FTU/kg phytase on performance, carcass characteristics, and bone mineralization of broilers aged 22 to 42 days kept in a high-temperature environment. A total of 336 Cobb broilers with an average initial weight of 0.883±0.005 kg were distributed in a completely randomized design with six treatments - a positive control (0.354 and 0.309% avP without addition of bacterial phytase for the phases of 22 to 33 and 34 to 42 days, respectively), and another five diets with inclusion of phytase (500 FTU) and reduction of the level of avP (0.354, 0.294, 0.233, 0.173, and 0.112%; and 0.309, 0.258, 0.207, 0.156, and 0.106% for the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone mineralization; Carcass characteristics; Heat stress; Performance; Thermal environment.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000200048
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Effect of dietary phytase suplementation on the performance, bone densitometry, and phosphorus and nitrogen excretion of broilers Rev. Bras. Ciênc. Avic.
Assuena,V; Junqueira,OM; Duarte,KF; Laurentiz,AC; Filardi,RS; Sgavioli,S.
This experiment was carried out to evaluate the effects of the inclusion of different levels of phytase on broiler performance, bone densitometry, and phosphorus and nitrogen excretion. Nine hundred and sixty one-day old broilers, 50% males and 50% females, were distributed in a completely randomized experimental design into five treatments and six replicates 32 birds each. The treatments consisted of a control diet and four diets with the addition 25, 50, 75, and 100 g/ ton of phytase (250, 500, 750 and 1000 FTU of phytase/kg fed). Diets were formulated to contain equal nutritional levels, and considered the phytase product nutritional levels. In general, the addition of phytase resulted in a linear decrease in broiler performance. However, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone mineralization; Feed conversion ratio; Feed intake; Weight gain.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100005
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Enzyme Supplementation of Broiler Feeds with Reduced Mineral and Energy Levels Rev. Bras. Ciênc. Avic.
Nunes,JO; Abreu,RD; Brito,JAG; Silva,RF da; Oliveira,LS; Jesus,NA.
ABSTRACT An experiment was conducted with the purpose of evaluating enzyme blends on the performance, carcass traits, and bone mineralization of broilers. In total, 928 one-day-old Cobb 500 male chicks of were used. A completely randomized design with four treatments with eight replicates of 29 birds each was adopted. The evaluated treatments were: 1- Positive Control (PC), feed containing the nutritional recommendations of the genetic company's manual; 2- Negative Control (NC), feed with reductions of 75 kcal/kg AME and 0.10 and 0.12 percent points of phosphorus and calcium, respectively; 3 - NC + enzyme blend (amylase + b-glucanase, xylanase, and phytase; 250 g/t of feed) and 4 - NC + enzyme complex (phytase, amylase, xylanase, glucanase, pectinase,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Additives; Bone mineralization; Broilers; Carcass; Performance..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015001000015
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Influence of dietary 1αlpha-hydroxycholecalciferol, individually or in combination with microbial phytase in calcium and phosphorus deficient diets on growth performance and tibia parameter of Japanese quails (Coturnix japonica) Animal Sciences
Kheiri, Farshd; Poshtvar, Mohammad; Jalali Haji Abadi, Sayed Mohammad Ali; Landy, Nasir.
  The effect of 1α-OH-D3 in calcium-phosphorus (Ca-P) deficient diets on Japanese quail growth performance and tibia parameters was investigated. Eight-day-old (n = 160) newly hatched quails were weighed and randomly allocated to 20 groups, each with 4 replicate pens of 8 birds. Treatments were as follows: T1, Ca-P-adequate; T2,Ca-P-deficient; T3, Ca-P-deficient + 500 FTU kg-1 of phytase (Ph); T4, Ca-P-deficient diet + 5 µg kg-1 of 1α-OH-D3; T5,Ca-P-deficient + Ph + 5 µg kg-1 of 1α-OH-D3. Results showed that quails fed Ca-P-adequate had significantly higher body weight compared with quails fed Ca-P-deficient, Ca-P deficient supplemented with 1α-OH-D3 and Ca-P-deficient supplemented with 1α-OH-D3 and phytase, but did not differ from Ca-P-deficient diet...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone mineralization; Bird; Calcium and phosphorus deficiency; Phytase; Vitamin D derivative..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42540
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Reduction of calcium levels in rations supplemented with vitamin D3 or 25-OH-D3 for broilers R. Bras. Zootec.
Tizziani,Tarciso; Donzele,Rita Flavia Miranda de Oliveira; Donzele,Juarez Lopes; Silva,Amanda Dione; Muniz,Jorge Cunha Lima; Jacob,Rodrigo de Freitas; Brumano,Gladstone; Albino,Luiz Fernando Teixeira.
ABSTRACT An experiment was carried out to verify the response to the Ca reduction levels of diets with different vitamin D sources on performance, bone mineral deposition, serum concentrations, digestibility, carcass characteristics, and meat quality of broiler chickens in the period from 1 to 42 days reared in thermoneutral environment. A total of 504 male broilers with one day of age and average weight of 43.27±1.08 g were housed in climatic chambers and distributed in a completely randomized design. The study consisted of a 4 × 2 factorial, with four Ca reduction levels (0, 10, 20, and 30%) and two vitamin D sources (2760 IU of D3 or 25-OH-D3). The performance of animals at 21 and 42 days of age was not affected by Ca reduction by up to 30%, regardless...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone mineralization; Digestibility; Meat quality; Performance.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100531
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