Rendimiento de grano de genotipos de maíz sembrados bajo tres densidades de población

the objective of this study was to determine the effect of the population density on the grain yield of nine tropical maize genotypes (zea mays l.). a study was conducted in 2005 at the experimental station of the universidad juárez autónoma de tabasco, centro municipality, tabasco. a randomized complete block experimental design with four replicates and a split plot arrangement was used. the big plots contained population densities of 44 289, 53 200 and 66 500 plants ha-1, and the small plot contained population densities of 21, 22, 23, 25, 32, 43, 49, the hs-3g hybrid and the vs-536 variety. significant differences among densities were recorded only for grain yield (p < 0.01), genotypes for plant height (p < 0.01), ear height (p < 0.01), and days to flowering (p < 0.01). the density of 66 500 plants ha-1 presented the greatest grain yield (p < 0.05). the interaction between population and density was non significant. the genotypes with the best grain yield were populations 21, 23, 25, 43 and hs-3g.