Efeitos de programas de iluminação na produção de ovos de codornas (Coturnix coturnix) Effects of lighting programs on the eggs production of quails (Coturnix coturnix)

Abstract

Com o objetivo de avaliar o efeito de programas de iluminação contínuo e intermitentes sobre a produção de codornas-japonesas (Coturnix japonica) criadas em galpão aberto, neste trabalho, realizado no Departamento de Zootecnia da Universidade Federal de Lavras MG, utilizaram-se 720 codornas de 36 semanas de idade, durante 5 períodos de 28 dias submetidas a 3 programas de luz em delineamento inteiramente ao acaso com restrições nos tratamentos e 12 repetições. O programa contínuo contou com fotoperíodo médio de 15h30 (natural + artificial) e noite principal (escotoperíodo) de 8h30 (± 12 min); o programa intermitente 1 contou com iluminação intermitente com duas fotofases fracionadas em 15h30 e com uma noite principal de 8h30 (± 12 min); o programa intermitente 2 teve iluminação intermitente com 3 fotofases em um período estimulatório de 15h30 (duas fotofases e duas escotofases eqüidistantes entre a luz natural) e escotoperíodo de 8h30. Avaliaram-se o consumo de ração (g/ave/dia), produção de ovos (ovos/ave/dia x 100), peso e massa dos ovos (g), conversão alimentar expressa por peso de ovo (g/g) e por dúzia de ovos e as médias foram comparadas pelo teste SNK (5%). Os resultados das aves nos diferentes programas apresentaram-se semelhante (P>0,05) para postura, peso, massa dos conversão/dúzia de ovos. As codornas no programa intermitente 1 apresentaram menor (PTo evaluate the effect of continuous and intermittent lighting programms on the production and quality of eggs of quails (Coturnix coturnix) rearing in open shelter. The experiment was conducted at Animal Science Department of UFLA - Lavras MG - Brazil, with 720 quails 36 weeks of age, during 5 periods of 28 days each. They were submitted at completely randomized design with three light programs with restrictions in the treatments and 12 replications. The continuous program (medium photoperiod of 15:30 (natural + artificial) and main night (escotoperiod) of 8:30 (±12 min)); the intermittent one program (intermittent lighting with two fractional photophases in 15:30 and main night of 8:30 (±12 min)); the intermittent two programms had intermittent lighting with three photophases in a period stimulatory of 15:30 (two photophases and two halfway escotophases among the natural light) and escotoperíod of 8:30. The feed intake was evaluated (g/quail/day), egg production (egg/quail/day x 100), weigh and mass eggs (g), feed conversion expresses as egg weight (g/g) and for dozen of eggs. The means were compared in the SNK tests (5%). The results of the quails production in the different programms showed similar (P>0,05) for hatching, weight, mass of the feed conversion/dozen. The quails in the intermittent program one showed smaller (P<0,05) feed intake and better (P<0,05) feed conversion/weight eggs in relation to the quails in the others programms. The use of programms of intermittent lighting in quails rearing at open shelter, starting from to 36th week of age, it reduces the time of artificial lighting without affecting the egg production, weight eggs, mass eggs and feed conversion/dozen of eggs; however the feed intake was lower and the feed conversion/weight eggs was improved with the intermittent program one.

Keywords

• Codornas
• Programas de luz
• Iluminação intermitente
• Postura
• Quail
• Lighting programms
• Intermittent light
• Laying