Híbridos de milho em diferentes ambientes de cultivo

Abstract

The use of corn hybrids in different growing environments can lead to varying responses, impacting productivity due to the interaction in their growth and development. The objective of this study is to assess the performance of hybrids in different growing environments. The project was conducted at Granja Vizzoto, located in the municipality of Itaqui/RS, where the hybrids P30F53 (early), AG9025 (super early), NK467 (super early), SHS2020 (super early), SHS7939 (super early), SHS7930 (early), SHS8010 (early), SHS8004 (super early), MG300 (super early), and FS670 (early) were planted in three environments. Environment 1 was characterized by the highest (66 m), environment 2 by its steeper slope (2.5%), and environment 3 by the lowest height (54 m). Corn yield components were analyzed in each environment, such as ear size, number of rows, number of grains, ear thickness, cob thickness, ear weight, grain weight, cob weight, and grain size, with special attention to the diverse responses of the hybrids. The experiment followed a factorial design of 10 x 3, involving 10 hybrids and 3 growing environments, with the results analyzed using the SISVAR software. The most productive environment for cultivation was environment 2, characterized by a steeper slope, where there is greater exposure to solar radiation. The NK467 hybrid proved to be the most adapted, displaying good performance in all three growing environments. The SHS8010 hybrid encountered production difficulties in all three environments. The P30F53 hybrid exhibited variations in cob thickness between environments; in the highland environment, it showed an average cob thickness, in the steeper slope environment, it had a greater thickness, while in the lowland environment, it had a thinner cob, where this variation can be explained by stresses.