Effect of autumn urea application on ascospore production of Venturia inaequalis and on control of apple scab
Cimanowski, J.
1996
Type
masterThesis
Creator
Identifier
202269655
Title
Estudo dos parâmetros produtivos de três estirpes de galinhas poedeiras.
Contributor
Vaz, Edgar de Santa Rita
Subject
Galinhas poedeiras
Taxa de postura
Peso do ovo
Consumo de alimento
Resultado económico
Laying hens
Laying rate
Egg weight
Economic result
Food consumption
Domínio/Área Científica::Ciências Agrárias
Taxa de postura
Peso do ovo
Consumo de alimento
Resultado económico
Laying hens
Laying rate
Egg weight
Economic result
Food consumption
Domínio/Área Científica::Ciências Agrárias
Date
2019-08-01T09:54:09Z
2019-08-01T09:54:09Z
2019
2019-08-01T09:54:09Z
2019
Description
Este trabalho teve como objetivo principal, a comparação dos parâmetros produtivos de três estirpes de galinhas poedeiras.
Os parâmetros produtivos foram comparados entre estirpes, Bovans, Lohmann e Dekalb, com 141925, 157392 e 163517 galinhas poedeiras, respetivamente. Durante o período de crescimento os bandos Lohmann e Dekalb foram sujeitos a um programa de luz intermitente, enquanto que o bando Bovans, foi sujeito a um programa de luz continuo. A estimulação luminosa, durante a recria e pré-postura, originou um início de postura precoce, menor peso médio do ovo e maior taxa de postura. Em postura, os bandos foram sujeitos a um programa adaptado a cada bando conforme o peso corporal médio. Tanto no período de crescimento como no período de postura, os tipos de alimento distribuído foram semelhantes, assim como as condições de maneio.
O bando Lohmann foi o que registou menor consumo de alimento e I.C. alimentar, tanto na recria como durante a postura em relação aos outros bandos. O bando Bovans foi o que obteve o consumo médio de ração por galinha mais elevado com 118,77g seguido do bando Dekalb com 117,07 g e Lohmann com 111,53 g.
As três estirpes apresentaram taxas de postura significativamente superiores aos valores standard (⍴≤0,05), tendo o bando Dekalb obtido a taxa de postura mais elevada, com 91,49%, enquanto que os bandos Bovans e Lohmann obtiveram 90,85% e 88,7%, respetivamente.
No que diz respeito ao peso do ovo, não houve diferenças significativas (⍴≤0,05) entre os bandos, no entanto, o bando Lohmann obteve o peso médio do ovo mais elevado com 61,49g, seguindo-se o bando Bovans com 60,28g e o bando Dekalb com 60,19g. Em relação ao número de ovos e massa de ovo, o bando Dekalb produziu mais ovos (435) e maior massa de ovo por galinha (26,17 Kg).
A taxa de mortalidade acumulada (11,25%) do bando Lohmann, foi significativamente mais elevada (⍴≤0,05) do que nos bandos Bovans e Dekalb.
O bando Lohmann apresentou uma rentabilidade económica 12,7% e 17% superior aos bandos Dekalb e Bovans respetivamente, como consequência do menor consumo de ração, menor índice de conversão alimentar e maior peso médio do ovo.
Abstract: The objective of this work was to compare the productive parameters of three strains of laying hens. The productive parameters were compared between strains, Bovans, Lohmann and Dekalb, with 141925, 157392 and 163517 hens respectively. During the growing period, the Lohmann and Dekalb flocks were subjected to a continuous light program, while the Bovans flock was subjected to a flashing light program. Light stimulation during rearing and pre-laying resulted in early laying, lower average egg weight and higher laying rate compared to the other two groups. In the laying, the flocks were subjected to a program adapted to each flock according to the average body weight. Both in the growing period and in the laying period the types of food were similar, as well as the management. The Lohmann flock had the lowest feed intake of 111.53 g and feed conversion rate to the egg production, both in the rearing and during laying in relation to the other flocks, the Bovans flock was the one that had the average feed intake per hen higher with 118.77 g followed by the Dekalb flock with 117.07 g. The three strains had significantly higher laying rates than the standard values (⍴≤0,05), the Dekalb flock had the highest laying rate with 91.49%, while the Bovans and Lohmann flocks had 90.85% and 88.7% respectively. As for the egg weight, there were no significant differences (⍴≤0,05) between the flocks, however the Lohmann flock had the highest average egg weight with 61.49g followed by the Bovans flock with 60, 28 g and the Dekalb flock with 60.19 g. As for the number of eggs and egg mass, the Dekalb flock produced more eggs (435) and greater egg mass per hen (26.17 kg). The cumulated mortality rate was higher in the Lohmann flock with 11.25%, while in the Bovans and Dekalb flocks there were no significant differences (⍴≤0,05). The Lohmann flock had economic rate of return 12.7% and 17% higher than the Dekalb and Bovans flocks respectively, as a consequence of the lower feed intake, lower feed conversion rate and higher average egg weight.
Abstract: The objective of this work was to compare the productive parameters of three strains of laying hens. The productive parameters were compared between strains, Bovans, Lohmann and Dekalb, with 141925, 157392 and 163517 hens respectively. During the growing period, the Lohmann and Dekalb flocks were subjected to a continuous light program, while the Bovans flock was subjected to a flashing light program. Light stimulation during rearing and pre-laying resulted in early laying, lower average egg weight and higher laying rate compared to the other two groups. In the laying, the flocks were subjected to a program adapted to each flock according to the average body weight. Both in the growing period and in the laying period the types of food were similar, as well as the management. The Lohmann flock had the lowest feed intake of 111.53 g and feed conversion rate to the egg production, both in the rearing and during laying in relation to the other flocks, the Bovans flock was the one that had the average feed intake per hen higher with 118.77 g followed by the Dekalb flock with 117.07 g. The three strains had significantly higher laying rates than the standard values (⍴≤0,05), the Dekalb flock had the highest laying rate with 91.49%, while the Bovans and Lohmann flocks had 90.85% and 88.7% respectively. As for the egg weight, there were no significant differences (⍴≤0,05) between the flocks, however the Lohmann flock had the highest average egg weight with 61.49g followed by the Bovans flock with 60, 28 g and the Dekalb flock with 60.19 g. As for the number of eggs and egg mass, the Dekalb flock produced more eggs (435) and greater egg mass per hen (26.17 kg). The cumulated mortality rate was higher in the Lohmann flock with 11.25%, while in the Bovans and Dekalb flocks there were no significant differences (⍴≤0,05). The Lohmann flock had economic rate of return 12.7% and 17% higher than the Dekalb and Bovans flocks respectively, as a consequence of the lower feed intake, lower feed conversion rate and higher average egg weight.
Access restrictions
restrictedAccess
http://creativecommons.org/licenses/by/4.0/
http://creativecommons.org/licenses/by/4.0/
Language
por
Comments