Consulta: subjectFacets:"Shell thickness"
Registros recuperados: 4
Data/hora: 02/06/2024 05:17:28

Limestone particle sizes and lighting regimens on egg and bone quality of laying hens
Provedor de dados: 86
Autores: Xavier,Regina Patrícia de Souza; Freitas,Ednardo Rodrigues; Braz,Nádia Melo; Farias,Nadja Naiara Pereira; Lima,Raffaella Castro; Watanabe,Pedro Henrique; Nascimento,Germano Augusto Jerônimo; Peixoto,Maria Simone Mendes.
Abstract:The objective of this work was to evaluate the effect of limestone particle sizes in the diet and of lighting regimes on the egg and bone quality and on the performance of commercial laying hens. Three hundred Hissex White layers, at 18 weeks of age, were distributed in a completely randomized design, in a 5×2 factorial arrangement (coarse limestone in the diet at 0, 25, 50, 75, and 100%; with or without artificial light), with five replicates of six birds. No significant interaction was observed between particle sizes and lighting regime for the evaluated parameters. There was no significant effect of coarse limestone level in the diet on the performance and egg quality of hens; however, bone deformity (3.23 to 4.01 mm), strength (5.19 to 6.70...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg mass; Shell thickness; Specific gravity; Tibia.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000800718

Effect of crude protein levels and organic selenium supplementation in the diets fed during the breeding season on reproductive parameters of red-winged tinamous (Rhynchotus rufescens)
Provedor de dados: 89
Autores: Felipe,L; Santos,EC; Tavian,AF; Góes,PAA; Moraes,VMB; Tonhati,H; Boleli,IC; Malheiros,EB; Barnabé,VH; Queiroz,SA.
There is little information on the nutrition of red-winged tinamous (Rhynchotus rufescens) reared in captivity, and their nutritional requirements still need to be determined. This study aimed at determining dietary crude protein requirements and testing four organic selenium supplementation levels in the diet of red-winged tinamous during the breeding season. Birds were housed in a conventional broiler house divided in 16 boxes with one male and three females each. Iso-energy (2800kcal ME/kg) pelleted feeds, based on corn and soybean meal, were supplied in tube feeders. In the first experiment, treatments consisted of four different diets containing different crude protein (CP) contents (15, 18, 21, or 24%) and in the second experiment, the four diets...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg weight; Fertility; Nutrition; Semen quality; Shell thickness.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000100010

Water vapor conductance: a technique using eggshell fragments and relations with other parameters of eggshell
Provedor de dados: 96
Autores: Araújo,Itallo Conrado Sousa de; Leandro,Nadja Susana Mogyca; Mesquita,Mariana Alves; Café,Marcos Barcellos; Mello,Heloisa Helena Carvalho; Gonzales,Elisabeth.
ABSTRACT The objective of this study was to evaluate a technique for quantifying eggshell conductance using shell fragments from hatched eggs. Additional objectives were to calculate the correlation between eggshell conductance, porosity, and thickness and correlate these parameters with incubation data. The study design was fully randomized in a 3 × 3 factorial scheme (three egg regions - large end, equator, and narrow end - and three ages of broiler breeders – 29, 35, and 59 weeks). A total of 216 eggs were used, with 24 repetitions for each treatment. Neither conductance nor shell thickness showed any interaction with egg region. Breeder age influenced eggshell conductance, such that it was greatest in eggshells from 59-week breeders (0.323 mg day−1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertile eggs; Porosity; Shell conductance; Shell thickness.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001200896

Performance and egg quality of laying hens fed with mineral sources and rosemary oil
Provedor de dados: 42
Autores: GARCIA,ELIS REGINA DE M.; CHAVES,NATÁLIA R.B.; OLIVEIRA,CARLOS ANTONIO L. DE; KIEFER,CHARLES; MELO,EVILÁSIO P. DE.
Abstract In order to evaluate the effect of rosemary oil and micro mineral sources on the performance and egg quality of laying hens, 288 hens were used and distributed in a completely randomized design using a 2x3 factorial (mineral sources x rosemary oil) with six different diets and six replications. Diets were formulated containing inorganic or organic minerals, with or without added rosemary oil (100 and 200 mg kg-1). The treatments showed interaction for average egg weight, yolk color, albumen and yolk percentage, with significant results from the use of organic minerals compared to inorganic minerals. The addition of 200 mg kg-1 rosemary oil in diets improved laying rate, egg mass, specific gravity, number of pores on the shell when compared to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chelated mineral; Feed intake; Haugh unit; Rosmarinus officinalis; Shell thickness.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300851