EGG YOLK COLOR OF COMMERCIAL LAYING HENS RECEIVING COMMERCIAL PIGMENT IN DIET

Abstract The aim of this study was to evaluate the egg yolk pigmentation of laying hens fed commercial powdered products (CPP) based on canthaxanthin and urucum seed oil. A total of 240 commercial laying hens at 55 weeks of age were used, which received five different rations: control (CR) based on corn and soybean meal, CR with two levels (70 and 140 ppm) of CPP and CR with two levels of mixture between synthetic commercial pigments Carophyll® Yellow and Red (20 + 10 ppm) and (15 + 30 ppm), and four replicates of twelve birds each. The performance and color of the yolk were evaluated, using the colorimetric fan. There was no effect on the performance of the laying hens, except for the color of the yolk, which showed interaction of the pigmentants in the different periods. At seven days of supply there was stabilization of pigmentation with use of 70 ppm of the commercial powdered product, while egg yolks from hens receiving the inclusion of 140 ppm stabilized color at 14 days of delivery. The commercial product based on canthaxanthin and urucum seed oil is efficient in egg yolk pigmentation in yellow maize based diets.

摘要 本研究旨在评估饲喂以角黄素（canthaxanthin）和胭脂树籽油（urucum seed oil）为原料的商用粉状产品（commercial powdered products, CPP）的商品蛋鸡的蛋黄着色效果。试验选取240只55周龄的商品蛋鸡，设置5种日粮处理：以玉米和豆粕为基础的对照组（control, CR）、添加两种梯度（70 ppm与140 ppm）CPP的试验组，以及添加两种配比的合成商用色素加丽素黄（Carophyll® Yellow）与加丽素红（Carophyll® Red）的试验组，配比分别为20+10 ppm与15+30 ppm，每组设置4个重复，每个重复含12只蛋鸡。试验采用比色扇（colorimetric fan）评定蛋黄颜色，同时测定蛋鸡生产性能。结果显示，除蛋黄颜色外，各日粮处理对蛋鸡生产性能无显著影响；蛋黄颜色在不同饲喂周期下表现出色素添加剂的交互效应。饲喂70 ppm CPP组的蛋黄着色于饲喂7天后趋于稳定，而饲喂140 ppm CPP组的蛋黄颜色则于饲喂14天后达到稳定。以角黄素和胭脂树籽油为原料的商用粉状产品，在以黄玉米为基础的日粮中可有效实现蛋黄着色。