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- W2289256524 abstract "Objetivou-se avaliar os efeitos da inclusao direta na racao de 0, 1%, 1,5% e 2% da alga Lithothamnium calcareum, a idade da ave e a interacao entre eles sobre a producao e a qualidade da casca de ovos de poedeiras comerciais de segundo ciclo. O experimento foi realizado em delineamento inteiramente casualizado em esquema de parcelas subdivididas (nivel de inclusao: 0, 1%, 1,5% e 2% x idades: 112, 114, 116 e 118 semanas de idade) com seis repeticoes. Cada repeticao foi composta de 10 aves da linhagem Dekalb White alojadas com 110 semanas de idade. Em cada idade foram coletados quatro ovos de cada repeticao. Os dados foram submetidos a analise de variância e as medias comparadas pelo teste de Scott-Knott 5%. As caracteristicas avaliadas foram: percentagem de postura, ovos trincados e quebrados, peso dos ovos, gravidade especifica, percentagem de casca, peso da gema, clara e casca, materia mineral da casca, espessura da casca, numero de poros da casca, percentagem de calcio e fosforo da casca. O nivel de inclusao da alga aumentou a percentagem de postura, a espessura da casca, a percentagem de materia mineral e de calcio da casca, e diminuiu percentagem de ovos trincados e numero de poros da casca. O aumento da idade das aves determinou a diminuicao da qualidade da casca dos ovos. Conclui-se que os diferentes niveis de inclusao da alga Lithothamnium calcareum melhoram a producao e a qualidade externa dos ovos.%%%%This study was performed with the objective of assessing the effects of direct inclusion of 0%, 1%, 1.5% and 2% of the alga Lithothamnium calcareum in the diet, the age hen and interaction between these variables on the production and egg shell quality of laying hens in the second cycle. A completely randomized design was used with subdivided portions (inclusion level: 0%, 1%, 1.5% and 2% x age: 112, 114, 116 and 118 weeks of age) with 6 replications, 10 hens per experimental unit. Each replications of the experiment involved use of 10 Dekalb White hens lines with an age of 110 weeks, four eggs being collected during each period. Percentage of eggs, percentage of broken eggs, percentage of cracked eggs, egg weight; yolk weight, white weight, eggshell weight, specific gravity, percentage eggshell, shell thickness ; number of shell pores; percentage of mineral matter eggshell, percentage of calcium and phosphorus in eggshell were measured and means were compared by Scott-Knott 5% test. The inclusion level of the alga increased the percentage of egg, shell thickness, percentage of mineral matter eggshell and calcium and decreased percentage of cracked eggs and number of pores in the shell. The increasing age of the laying hens decreased eggs shell quality. It was concluded that inclusion levels of Lithothamnium calcareum increased production and egg shell quality." @default.
- W2289256524 created "2016-06-24" @default.
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- W2289256524 date "2012-10-10" @default.
- W2289256524 modified "2023-09-24" @default.
- W2289256524 title "Utilização da alga Lithothamnium calcareum para poedeiras de linhagens leves" @default.
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