Se evaluó el efecto de dos tamaños de partículas de calcio y fósforo, fino y grueso, suministrado a gallinas ponedoras, a través de la dieta, en una y dos frecuencias por día, evaluándose espesor de la cáscara, porcentaje de postura, masa de huevo, consumo de alimento, peso promedio del huevo, conversión alimenticia y mérito económico. Se distribuyeron 384 gallinas de 36 semanas de edad, en 8 tratamientos, con tres repeticiones, utilizándose el diseño completamente al azar, con un arreglo factorial de 2x2x2 (dos tamaños de partícula de calcio, dos tamaños de partícula del fósforo, dos frecuencias de suministro del alimento). Hubo diferencias estadísticas para el espesor de la cáscara, donde las gallinas que consumieron calcio y fósforo grueso tuvieron los mayores espesores de cáscara. No hubo diferencias significativas para el porcentaje de postura y el peso promedi...

The aim of this study was to evaluate the productive performance of laying quails (Coturnix coturnix japonica). The study was carried out at the poultry farm of the La Molina National Agrarian University in Lima, Peru. In total, 1296 quail distributed in 96 females and 48 males of three ages (45, 52 and 59 days) with 130, 140 and 150 g of body weight, respectively, at the beginning of the laying were used. A random block design with a 32 factorial arrangement was used, taking as factors age and weight at the beginning of laying and as a block the weeks of laying (8, 11 and 17). The highest egg mass (10.72 ± 0.41 g/day/bird) was obtained when the quails started laying with 150 g of live weight.

The aim of this study was to relate morphometric measurements of the Coturnix coturnix japonica quail egg with the weight at birth in a commercial line of laying. In total, 274 birds were evaluated at one-day old, whose fertile eggs were classified into three categories according to weight: (1) 10.00-10.99, (2) 11.00-11.99, (3) 12.00-12.99 g for the variable birth weight, while the variables: transverse diameter and longitudinal diameter of the egg, and shape index were evaluated according to quartiles. In addition, the sex of the bird was evaluated. A completely randomized block model and correlations between the quantitative variables were used. A mean correlation of 0.65 was obtained between egg weight and longitudinal diameter, and low correlations between the variables longitudinal and transverse diameter (0.15). The birth weight was 7.36 ± 0.038, 7.92 ± 0.036 and 8.47 ± 0.058 g ...