Abstract
This study evaluated the effect of different levels of canola meal in the diet to laying Japanese quails on productive performance, egg quality and economic viability. A total of 120 80-day-old Japanese quails (Coturnix coturnix japonica) with average weight 146.54 ± 12 g were evaluated during 84 days. Dietary treatments consisted of the replacement of soybean meal with canola meal at 0, 10, 20, 30, 40 or 50%. We evaluated economic viability, productive performance, internal and external quality of eggs. Data were analyzed by polynomial regression at 5%. Body weight decreased linearly as the level of canola meal increased (p = 0.0055). Egg weight (p = 0.0032) and diameter (p = 0.0398) showed a quadratic response, increasing up to 30% substitution with subsequent reduction. Yolk color increased linearly as the level of canola meal increased (p = 0.0039). Canola meal can substitute soybean meal up to 30% without impairing productive performance, egg quality and diet cost.
Highlights
IntroductionCanola is a winter crop originally derived from rapeseed varieties, which have been altered by genetic selection that has markedly reduced its detrimental components, erucic acid and glucosinolate to a negligible level less than 20 μg g-1 (Leeson et al, 2001)
Canola is a winter crop originally derived from rapeseed varieties, which have been altered by genetic selection that has markedly reduced its detrimental components, erucic acid and glucosinolate to a negligible level less than 20 μg g-1 (Leeson et al, 2001).World production of canola oil ranks second among industrialized products derived from oil plants
A polynomial regression analysis was applied to predict the effect of the levels of canola meal in the diet on productive performance, internal and external quality of eggs and economic viability
Summary
Canola is a winter crop originally derived from rapeseed varieties, which have been altered by genetic selection that has markedly reduced its detrimental components, erucic acid and glucosinolate to a negligible level less than 20 μg g-1 (Leeson et al, 2001). The industrial extraction of oil generates canola meal as a byproduct, which can be acquired by producers at a low price. In some countries, such as Canada and the United States, its use is widespread in poultry production, mainly for feeding broilers and laying hens. The low values of digestible and metabolizable energy found in canola meal are mainly due to the high levels of fiber, which can be up to three times higher than in soybean meal, 11.2% and 5.3%, respectively (Rostagno et al, 2011). This study evaluated the effect of replacing soybean meal with canola meal on productive performance, economic viability and egg quality of laying Japanese quails
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