Microminerais orgânicos e vitamina C nas rações de poedeiras semipesadas em região de clima quente

Abstract

The experiment was carried out in order to evaluate the effects of the association of organic micro minerals with the vitamin C on the performance and egg quality of commercial semi-heavy laying hens, in an area of hot climate. The treatments consisted of 5 diets being: T1 – control-diet with 1,0 kg/t and micro minerals in the form 100% inorganic and without vitamin C supplementation; T2 - 1,0 kg/t micro minerals in the form of organic complex and without vitamin C supplementation; T3 - 1,0 kg/t micro minerals in the form of organic complex and 300 ppm of vitamin C; T4 - 1,5 kg/t micro minerals in the form of organic complex and without vitamin C supplementation; T5 - 1,5 kg/t micro minerals in the form of organic complex and 300 ppm of vitamin C. Were used 400 semi-heavy laying hens, Hysex Brown, with initial age of 33 weeks and weight of 1.800 ± 100g. A completely randomized design was used in split plot in time (21, 42, 63 and 84 days), with 5 treatments per plots, 8 replicates and 10 birds for experimental unit. There were not significant differences (P>0,05) among the treatments, for characteristics of egg quality. The treatments with vitamin C supplementation and the use of 1,5 kg/t of organic micro minerals lead the production of lighter eggs, in relation to control-diet (P 0,05). Therefore, it can be concluded that the vitamin C supplementation and organic micro mineral in the feed does not improve performance and eggs quality of semi-heavy laying hens in high temperature environment.