Potencial Produtivo de Híbridos de Milho em Segunda Safra

Abstract

The adaptation of corn hybrids to irrigation is essential to ensure efficient and sustainable production. Some corn hybrids are better adapted to environments with lower water availability, while others are better adapted to environments with higher availability. In general, corn crops require about 500 to 800 mm of water during the growth cycle, although the exact amount may vary depending on local conditions. Thus, this work aimed to evaluate whether the irrigated and rainfed environment affects the productive potential of the hybrids tested and to select those that best develop under irrigation in the second harvest. The experiment was set up in strips with four repetitions, with and without irrigation, and 30 hybrids. Agronomic aspects and vegetative indices were evaluated: plant height (ALT), ear insertion height (AIE), stem diameter (DIM), thousand grain weight (MMG), ear length (CES), ear diameter (DES), grains per row (GFL), rows per ear (FLE), grains per ear (GES), productivity (PROD), Normalized Difference Vegetation Index (NDVI), Normalized Difference Red Edge (NDRE), Soil Adjusted Vegetation Index (SAVI), and Enhanced Vegetation Index (EVI). Irrigation provided better results for most of the variables studied and for a large part of the hybrids. The hybrids with the worst performance were also the hybrids in which the irrigated environment did not provide good results, a fact that may be related to genetics.