Resumo

BARRERA-VIOLETH, José L.; CABRALES-HERRERA, Eliecer M.  e  SAENZ-NARVAEZ, Eliana P.. Response of hybrid maize 4028 on the application of organic amendments on soil Córdoba - Colombia. Orinoquia [online]. 2017, vol.21, n.2, pp.38-45. ISSN 0121-3709.  https://doi.org/10.22579/20112629.416.

In soils of Valle de Sinú Medio of medium fertility, the effect of several sources of organic fertilizers was evaluated in a hybrid corn crop, whose treatments were the following:: T1 (Bocashi), T2 (compost with weekly mixture without effective microorganisms EM-); T3(compost weekly mixture with EM); T4 (compost with fortnightly mixture without MS); T5 (compost with fortnightly mixture with MS), T6 at doses 2 t.ha-1 for all treatments with organic fertilizers and the absolute check (T0) received no fertilizers, while the relative check (TR) was fertilized with NPK doses of 100-40-30 kg.ha-1. The evaluated variables were grain yield and crop growth, of which the physiological indices were estimated (TCA or absolute growth rate, TCR or relative growth rate and TAN or net assimilation rate); the experimental design used was randomized complete blocks. It was found that the highest grain yield corresponded to chemical fertilization (6.86 t ha-1) and fertilization with Bocashi (6.40 t ha-1) without significant statistical differences between these two treatments. On the other hand, no significant statistical differences were found in the physiological parameters evaluated as plant height, number of leaves, dry mass and foliar area. For this experiment it is concluded that the Bocashi can substitute the chemical fertilization under the edaphoclimatic conditions of the Valley of the Middle Sinú.

Palavras-chave : Bocashi; organic fertilizers on maize; efficient organisms (EM) in maize; maize physiological indices.

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