Spatial arrangement and its implications in the yield of maize cultivars
There is a lack of information regarding variables that regulate the expression of the yield potential of maize. We studied yield components of maize under different arrangements on field, in the southwest region of the state of Goiás, Brazil. The soil of the experimental area is classified as Typic Orthotic. The experimental design was randomized blocks, in a 9x2 factorial scheme, with nine maize hybrids [30F53, 30F35, P3630, P3898, P3779, AG7098, DKB 310, CD 3612 and SHS 7990] and two spatial arrangements (single rows (45x45 cm) and twin rows (45x90x45 cm), with four replicates. The seeding was made with a one row sowing machine, and soil fertilizing carried out according to technical recommendations. Pest and weed control was employed when required, using an integrated management. The results were submitted to variance analysis, using a means comparison by Scott-Knot test and by multivariate models. The results of the interactions of maize hybrids and spatial arrangements were significant for all the variables with exception of the foliar area index. There were differences in correlations between the variables, with distinct canonical correlations and cultivar groupings. The maize hybrids DKB310 and P3839 stood out, showing satisfactory yield in both spatial arrangements. The modeling of spatial arrangements influenced the behavior of maize hybrids, especially DKB310 and P3898, which showed satisfactory yields in both spatial arrangements.