Avaliação da qualidade dos ovos de poedeiras alimentadas com erva mate (Ilex paraguariensis)

Abstract

The Brazilian territory is promising for egg production and the use of this source of animal protein has increased significantly in recent years and that drives the quest for improving the internal quality, external and the "Shelf life" or the egg shelf time. The objective of this work was to evaluate the internal quality of eggs of layers take second laying cycle fed with different levels of yerba mate (Ilex paraguariensis) in the diet. The experiment was conducted at the Universidade Federal da Grande Dourados, using 180 layers of White Bovans line, divided into five treatments with six repetitions and six birds per repetition. The treatments presented the following levels: 0; 15; 30; 45 and 60 g/kg feed/Kg yerba mate. The eggs were stored for 15 days in refrigerated and non refrigerated environment, at the end of the period were carried out analyses of internal and external quality of eggs and evaluation of colorimetric parameters: L *, a * and b *. It was possible to observe a reduction in the percentage of albumen (P < 0.0001) linearly (P < 0.0001) as increased the level of weed in the feed and, as a consequence, the percentage of gem was also greater at the higher levels of weed. The lightness (L *) reduced linearly with increasing levels of yerba mate (P < 0.001), which also increased linearly the yellow (b *) (P = 0.002). The inclusion of yerba mate in the diet of laying hens showed up bad for most quality indexes, except for the colour of the yolk.