Print version ISSN 0102-0536
ROCHA, Disraeli R da; FORNASIER FILHO, Domingos and BARBOSA, José Carlos. Effects of plant density on yield of green ears of corn cultivars. Hortic. Bras. [online]. 2011, vol.29, n.3, pp. 392-397. ISSN 0102-0536. http://dx.doi.org/10.1590/S0102-05362011000300023.
Green corn is a crop of great economic value for small and medium farmers, especially in irrigated areas. The objective of the study was to assess the yielding of green ears and other features of six cultivars of corn, undergoing sowing density with irrigation. The experimental design in split plots, with six main treatments (cultivars), four secondary treatments (densities) and four replications arranged in randomized blocks was utilized. The Cativerde 2, P3232, BM3061 and AG4051 cultivars showed the greatest heights of plants, whereas SWB551 was the smallest one. The smallest average height of insertion of the first ear was obtained by SWB551. AG4051, AG1051, BM3061 and P3232 outsized and outnumbered the other ones in terms of commercial ears scattered. Among the four planting densities tested, 50,000 plants/ha provided the highest corn ear yielding. The P3232 hybrid features higher thermal cycle and accumulation in relation to other cultivars, with BM3061 being the most precocious.
Keywords : Zea mays; hybrids; variety; sweet-corn; growing degree-days.