Produção de ovos de galinhas poedeiras submetidas à dietas base sorgo grão inteiro ou moído e protease

Abstract

The rations are commonly produced based on corn and soybean meal, however in periods of off-season or in those moments of low stock of corn grain, the opportunity to use sorghum grain. With a lower production cost this grain is usually offered on the market at a price below corn, which contributes to a reduction in the cost of feed and consequently meat and egg production, without loss of performance. The objective of this study was to evaluate the addition of sorghum grain in different grain sizes with the inclusion of a protease exoenzyme on the average egg weight in production (POP), laying (POS), feed conversion per dozen eggs (CAD) and feed conversion. by egg mass (CAM) of laying hens. In the experiment, 150 Dekalb White® laying hens, 97 weeks old and with egg production of about 80%, were conducted in a 28-day production cycle. The following experimental diets were used: TM - Corn based diet; SMP - Ground sorghum + protease feed; SIP - Whole sorghum + protease feed, SM - Ground sorghum based feed and SI - Whole grain sorghum based feed. The chickens received diets containing whole grain or ground sorghum with the addition of protease had similar behavior to the other treatments the POP and CAD variables. In the POS and CAM variables, the treatments containing whole grain and ground sorghum (SI and SM) were inferior to the treatments containing protease sorghum grain (SMP and SIP). It was concluded that the inclusion of protease exoenzyme (SMP and SIP) influenced the digestibility of nutrients present in sorghum grain, thus improving the production parameters of laying hens.