Resumo

PROANO, Jaime  e  TOMITA, Kentaro. Evaluation of three corn hybrids with nitrogen levels during rainy season, Guayaquil, Ecuador. Rev. Inv. Cs. Agro. y Vet. [online]. 2021, vol.5, n.13, pp.53-64. ISSN L:2664-0902.  https://doi.org/10.33996/revistaalfa.v5i13.97.

It was evaluated three hybrids of corn under the three levels of the nitrogen application (50, 100 and 500kgN/ha) during the rainy season at the Experimental Field in the ESPOL (Escuela Superior Politécnica del Litoral), Guayaquil, Guayas, Ecuador. The soil where the experiment was implemented is classified as Vertisol and it is known as high fertility, taking into account its high content of type 2: 1 clay mineral such as montmorillonite and / or illite. It was 43,9 meq/100g for CEC and 99,4% for the base saturation, respectively. These hybrids which were experimented are: Pioneer 4039 (P4039), Advanta 9313 (AV9313) and Advanta 9139 (AV9139), distributed by the company FARMAGRO. On the experimental area, it was applied 50kgP2O5 and 50kgK2O/ha, respectively. As agronomic character, it was observed the significant difference al 1% not only for the hybrid but also for nitrogen, as well as for length of leave, obtaining the largest for the AV 9139. Like the previous case of the grain yield with 14% moisture, it was observed the significant difference at 5% for the interaction. Although it was the highest performance for the AV9139, it was observed the negative trend in accordance with the higher nitrogen amounts. Recommending the hybrid AV 9139 with the application of 50kgN/ha according to the results obtained with the highest net benefit.

Palavras-chave : Economic application; Hybrid; Net profit; Nitrogen fertilization; Vertisol.

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