Agronomic Performance, Response and Efficient Use of Potassium in Genotypes Corn (Zea mays)
Weder Ferreira dos Santos
Department of Biodiversity and Biotechnology, Federal University of Tocantins, Farm 69-72 Street, Whiting, Lot 7 s/n - Seville Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Fernando Assis de Assunção *
Department of Agricultural Engineering, Tocantins Federal University, Farm 69-72 Street Badejos, Lot 7 s/n - Sevilha Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Layanni Ferreira Sodré
Department of Biodiversity and Biotechnology, Federal University of Tocantins, Farm 69-72 Street, Whiting, Lot 7 s/n - Seville Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Lucas Carneiro Maciel
Department of Agricultural Engineering, Tocantins Federal University, Farm 69-72 Street Badejos, Lot 7 s/n - Sevilha Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Magno De Oliveira
Department of Biodiversity and Biotechnology, Federal University of Tocantins, Farm 69-72 Street, Whiting, Lot 7 s/n - Seville Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Hélio Bandeira Barros
Department of Agricultural Engineering, Tocantins Federal University, Farm 69-72 Street Badejos, Lot 7 s/n - Sevilha Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Rubens Ribeiro da Silva
Department of Agricultural Engineering, Tocantins Federal University, Farm 69-72 Street Badejos, Lot 7 s/n - Sevilha Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Joênes Mucci Peluzio
Department of Agricultural Engineering, Tocantins Federal University, Farm 69-72 Street Badejos, Lot 7 s/n - Sevilha Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Adriano Silveira Barbosa
Department of Agricultural Engineering, Tocantins Federal University, Farm 69-72 Street Badejos, Lot 7 s/n - Sevilha Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
Talita Pereira de Souza Ferreira
Department of Biodiversity and Biotechnology, Federal University of Tocantins, Farm 69-72 Street, Whiting, Lot 7 s/n - Seville Garden, Gurupi - TO, 77404-970, Gurupi, Tocantins, Brazil.
*Author to whom correspondence should be addressed.
Abstract
The study aims to select maize for the response and efficiency of the use of potassium (K), in the municipality of Gurupi, state of Tocantins. Two trials of maize genotypes were carried out in Gurupi-TO, in the off-season 2017, one for high K condition and another for K low, applied in coverage. The experimental design of each experiment was a randomized block design with three replicates and seven treatments. The average grain production BK (6997 kg ha−1) was lower than the AK (7787 kg ha−1), which confirms that the application of potassium fertilizers in maize makes this answer the applications collaborating with better yields. The genotype (G3) showed that high yield in BK environment (above the average, 4532 kg ha−1) and low response rate application of paragraph, they are defined as efficient, unresponsive. The genotype G2 was classified as efficient and responsive being indicated for producers of both technological levels.
Keywords: Nutritional efficiency, efficiency indices, grain productivity, Zea mays L.