Sowing operation direction and population densities in corn growing

Rafael D G Corrêa,Newton K Warikoda,Carlos E A Furlani,Rafael H De F Noronha,Cristiano Zerbato,Danilo T De Oliveira

doi:10.1590/1807-1929/agriambi.v23n3p183-187

Rafael D G Corrêa, Newton K Warikoda + Show 4 more

Open Access

https://doi.org/10.1590/1807-1929/agriambi.v23n3p183-187

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Abstract

ABSTRACT Among the factors that may influence corn yield are sowing operation direction and plant population, since they alter the shade index between crop rows, and consequently the efficiency of interception of the photosynthetically active radiation by the leaves of plants. The aim of this study was to evaluate the influence of sowing direction and plant populations on P2830VYH hybrid corn yield. The experiment was conducted at the facilities of FCAV-UNESP, latitude 21º 14’ S and longitude 48º 16’ W in Jaboticabal (SP). The treatments were composed of three sowing directions (North-South, Northeast-Southwest, and East-West) and three population densities (40,000, 60,000 and 80,000 plants ha-1). The treatment with 80,000 plants ha-1 had the lowest cost per sack of corn and profitability 21% higher than that of the treatment with 60,000 plants ha-1, and 45% higher than that of the treatment with 40,000 plants ha-1. Sowing direction had no influence on grain yield when environmental conditions were favorable to the development of the crop. Lower plant densities lead to higher individual results in relation to the number of cobs, length of cobs and number of grains per row.

Highlights

In relation to the main factors responsible for the success in corn yield (Silva & Gamero, 2010), the population and plant arrangement stand out
The aim of this study was to evaluate the influence of sowing direction and plant populations on P2830VYH hybrid corn yield
Sowing direction had no influence on grain yield when environmental conditions were favorable to the development of the crop

Summary

Introduction

In relation to the main factors responsible for the success in corn yield (Silva & Gamero, 2010), the population and plant arrangement stand out. When these factors added to environmental factors are favorable to the development of the crop, the interception of solar radiation by leaves of corn plants influences grain yield (Uate et al, 2015) for optimizing the plant photosynthetic action. Among the factors that can increase or reduce the interception of solar radiation by plant leaves, it can be mentioned the sowing direction, which changes the indices of shading between the plants in the rows. Brunini & Turco (2016) in an experiment that occurred in the same region where the present study was conducted stated that the direction of the planting slope affects the growth of sugarcane, which suggests that corn could share this behavior, since it is within the group of C4 plants

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