Crescimento e produtividade de milho(Zea mays) em diferentes densidades de plantio no brejo paraibano.

Abstract

Plant population density is something that directly influences corn (Zea mays) crop yield. The present study was conducted from March to July 2017, located at the coordinates (latitude 6º57'52'' S; longitude 35º42'55'' W and an altitude of 510 m), aimed at evaluating the interaction between population density (DP) and maize yield in the brejo region of Paraíba. The experimental delineation used was randomized blocks, with five treatments (DP1 - 50,000 plants ha-1 ; DP2 - 70,000 plants ha-1 ; DP3 - 90,000 plants ha-1 ; DP4 - 110,000 plants ha-1 ; DP5 - 130,000 plants ha-1 ) and four repetitions. thus, the following avaluation’s performed: height, middle third leaf length, stem diameter, and number of leaves were evaluated every 7 days. After the harvest, the evaluation's carried out were: cob length and diameter, number of rows per cob, number of grains per row, and yield were performed when the cobs reached 13% moisture. The results showed that the increase in population density did not interfere with the development of the crop and provided a satisfactory result in the increase in productivity, with the use of 130,000 plants ha-1.