Efeito do tempo de armazenamento da ensilagem do grão de milho reidratado acrescida com enzima amilolítica: valor nutricional

Abstract

In relation to the greater use of technological innovations for animal production, corn silage has become the main bulky of high use in Brazil. However, the properties that make corn a widely used food in animal feed and the fundamental ingredient in the manufacture of silage, make it using, most of the time, hybrid corn cultivated in Brazil that contains high vitreousness, which limits its digestibility. Therefore, enzymatic additives in animal feed have been used more frequently. The purpose of this experiment was to evaluate the actions of amylolitic enzymes and the storage time on the nutritional value of rehydrated maize grain silage. 120 experimental silos were used, distributed in 3 treatments: 1- COM (without amylolitic enzyme addition); 2- α-AMI (α-amylase, Kerazyme 3035, enzymatic activity 400 U.mL-1); 3- GLU - (glucoamylase, Kerazyme 4560, enzymatic activity 300 U.mL-1). Bacterial inoculant - Lactobacillus plantarum 4x1010 UFC.g-1 + Propionibacterium acidipropionici 2.6x1010 UFC.g-1 - has been added to a dose of 4 g.t-1 of fresh matter in all treatments. Every 30 days 05 silos of each treatment were opened up to 240 days of storage. The results were submitted to variance analysis by the SAS 9.3 PROC MIXED programme. Over long periods of storage, the use of amylase had a negative influence (P≤0,05), increasing losses of MS, starch, CNF, DIVMS and increasing the accumulation of PB, EE, lignin and EB. Thus, the maximum time of use of silos, under these experimental conditions, was up to 89 days.