PLANTING FERTILIZATION AND NITROGEN DOSES IN TOPDRESSING IN SECOND-CROP CORN

Author:

Silva Luciana Maria daORCID,Silva Junior Rogério LamimORCID,Leão Pereira Resende CecíliaORCID,Marangoni Montes RafaelORCID,Santiago Silva Benett KatianeORCID,Benett Cleiton Gredson SabinORCID

Abstract

The present study aimed to evaluate the influence of fertilization formulated at planting and doses of nitrogen in topdressing on the yield components of second-crop corn. The experiment was conducted between March and June 2018 on the farm of the State University of Goiás, University Unit of Ipameri-GO. The randomized block design, arranged in a 3 x 5 factorial scheme with four replications, was used. Three fertilizer formulations at planting (06-22-12; 08-20-15 and 06-22-12 + 2% organic carbon) and five doses of N (0, 50, 100, 150 and 200 kg ha-1) in topdressing were evaluated. Leaf nitrogen content, fresh and dry mass of leaves, plant height, stem diameter, first ear insertion height, length and diameter of ears, 1000-grain weight, the mass of plants per hectare, extraction of nitrogen, and grain yield were assessed. Given the results, NPK formulated fertilizers can be used indifferently to grow second-crop corn. Nitrogen doses in topdressing have satisfactory results up to the estimated rate of 135 kg ha-1 for the cultivation of second-crop corn.

Publisher

Revista de Agricultura Neotropical

Subject

Agronomy and Crop Science

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