ABSTRACT
The aim of the present study was to evaluate the effect of lighting programs for male and female meat quails raised in an equatorial region on performance and carcass traits. A total of 1,500 sexed quails (Coturnix coturnix) was distributed in a completely randomized design in a 2 × 3 factorial arrangement, with 2 sexes (male and female) and 3 lighting programs (natural, intermittent, and continuous) with 5 replicates of 50 birds. The lighting programs were applied in the period from 7 to 49 d of age, being natural (12 h and 30 min of natural light and 11 h and 30 min of dark), intermittent (12 h and 30 min of natural light and 5 h and 30 min of artificial light, alternating lighting periods with one h and 06 min and periods of darkness with one h and 12 min), and continuous (23 h of natural + artificial light and one h of dark). Regardless of lighting program, female quails were heavier than males, and birds subjected to natural light weighed less than those exposed to continuous and intermittent lighting programs. Quails exposed to intermittent and continuous light presented higher weight gain and feed intake, and worse feed conversion ratio compared to birds under a natural light regimen. It is concluded that in an equatorial region, it is possible to use a lighting program with only natural light for raising male and female meat quails from 7 to 49 d of age.
Subject(s)
Animal Husbandry/methods , Coturnix/physiology , Lighting , Meat/analysis , Photoperiod , Animals , Coturnix/growth & development , Energy Metabolism , Female , Male , Random Allocation , Weight GainABSTRACT
Foram conduzidos dois ensaios para avaliar a utilização do farelo do farelo integral de arroz parboilizado (FIAP) em rações para leitões na fase de creche. No primeiro, foram utilizados 14 suínos machos castrados para a avaliação nutricional do ingrediente em ensaio de digestibilidade. O delineamento experimental foi o inteiramente ao acaso, com dois tratamentos e sete repetições por tratamento. O FIAP apresenta 17,15% de PB, elevado teor em fibras (33,75% de FDN e 15,91% de FDA) e teor reduzido de energia metabolizável, próximo a 2320kcal/kg. No segundo experimento, foram utilizados 60 leitões machos castrados, com o objetivo de avaliar o desempenho zootécnico, a ocorrência de diarreia e a viabilidade econômica do farelo de arroz parboilizado. O delineamento experimental foi em blocos ao acaso, com cinco tratamentos (0, 4, 8, 12 e 16% de inclusão) e seis repetições. Não houve diferença significativa entre o tratamento controle e os tratamentos teste (P>0,05), assim como para a análise de regressão, em que os crescentes níveis de inclusão do ingrediente não resultaram em piora no desempenho (P>0,05). O FIAP pode ser incluído até o nível de 16% em rações para leitões na fase de creche...
Two assays were conducted to evaluate the parboiled rice bran in piglet's diets in the nursery phase. In the first, 14 male castrated piglets were allotted to determine the nutritional value of parboiled rice bran in a digestibility assay. A completely randomized design, with 2 treatments and 7 replicates per treatment were used. The parboiled rice bran presents 17.15% of CP and high fiber content (33.75% of NDF and 15.91% of ADF) and low metabolizable energy (2320kcal/kg). In the second assay, 60 male castrated piglets were used to evaluate the effect of inclusion on productive performance, diarrhea incidence and economic viability of parboiled rice bran. A randomized block design was used, with 5 treatments (0, 4, 8, 12 and 16%) and 6 replicates. There was no difference between treatments and control treatment as well as in regression analysis, and the increasing levels of parboiled rice bran did not reduce the performance of animals. In conclusion, parboiled rice bran can be included up to 16% in diets for piglets in the nursery phase...
