Análise bromatológica de cultivares de milho utilizados na dieta de animais de produção

Abstract

The objective of this article was to bromatologically analyze three varieties of maize, namely, Crioulo maize (Pixurum), conventional maize (P2501) and transgenic maize (AG9025), aiming at their use in the diets of production animals, based on the determination of amount of macro-elements such as nitrogen and phosphorus present in the grain, as well as evaluating the analysis of dry matter, mineral matter, ether extract, neutral detergent fiber (NDF), acid detergent fiber (ADF), Hemicellulose and Lignin. Such analyzes were carried out within a project that aims to qualify and quantify three different varieties of corn, as well as to analyze their use in the diet of production animals. The process of genetic improvement resulted in better vigor among the hybrids and greater accumulation of nutrients, which leads the plants to have high climatic adaptability and able to adapt to different types of management, which is considered that each handling can influence the absorption of nutrients by the grains. After the evaluation of Nitrogen (N) in the cultivars, it is noted that the Crioulo corn variety (Pixurum) stores a greater amount of nitrogen in its grain. For the Phosphorus (P) content, it can be analyzed that the uptake of the nutrient by the varieties of Crioulo corn (Pixurum) and Conventional corn (AG2501) are higher compared to transgenic corn (9025). For the analysis of Dry matter (DM), Mineral matter (MM), Ether extract (EE), Crude protein (CP), Neutral detergent fiber (NDF), Acid detergent fiber (ADF), Hemicellulose (HMC) and Lignin (LIG), in the values of Hemicellulose and Lignin of the three different cultivars, it is possible to evaluate that the Crioula variety presented, in general, better results in the contents of nutrients such as Nitrogen, Phosphorus, Dry Matter, Mineral Matter, Ethereal Extract, Crude Protein and Neutral detergent fiber, which are considered good grain nutrient storage variables. However, in neutral detergent fiber, hemicellulose and lignin, Crioulo corn showed worse results compared to conventional corn and transgenic corn, which will result in a decrease in absorption and animal use in grain consumption. Depending on the data obtained on the levels of Hemicellulose and Lignin, new experiments must be carried out in order to evaluate their absorption by production animals.