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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

INOCULATION OF DIAZOTROPHIC BACTERIA AND NITROGEN FERTILIZATION IN TOPDRESSING IN IRRIGATED CORN

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Author(s):
VANESSA ZIRONDI LONGHINI [1] ; WÉSLEY CARLOS ROSSINI DE SOUZA [2] ; MARCELO ANDREOTTI [3] ; NATALIA DE ÁVILA SOARES [4] ; NÍDIA RAQUEL COSTA [5]
Total Authors: 5
Affiliation:
[1] Universidade Estadual Paulista. College of Agricultural Sciences and Veterinary Medicine. Department of Animal Science - Brasil
[2] Universidade Estadual Paulista. College of Engineering. Department of Soil Science - Brasil
[3] Universidade Estadual Paulista. College of Engineering. Department of Soil Science - Brasil
[4] Universidade Federal dos Vales de Jequetinhonha e Mucuri. Department of Animal Science - Brasil
[5] Universidade Estadual Paulista. College of Agricultural Science. Department of Crop Science - Brasil
Total Affiliations: 5
Document type: Journal article
Source: Rev. Caatinga; v. 29, n. 2, p. 338-347, 2016-06-00.
Abstract

ABSTRACT: Corn is a nitrogen-intensive crop, and the use of management practices such as inoculation of the seed with diazotrophic bacteria, which can maximize crop productivity and reduce the need of nitrogen fertilizers, may result in lower production costs. The present study aimed to evaluate the effect of inoculation of corn seed with Azospirillum brasilense and controlled addition of nitrogen to topdressing on the nutrition, production components, and productivity of crop grain. The experimental design was a randomized block design, with four replications in a 2 × 5 factorial scheme. The treatments consisted of inoculation or not of corn seed with A. brasilense (at 100 mL per 25 kg of seed) and five nitrogen (N) levels in topdressing (0, 30, 60, 90, and 120 kg N ha-1 from urea [45% N]) were applied when the corn was in the phenological growth stage V6. Foliar macronutrients, foliar chlorophyll index (FCI), production components, and yield of corn grain were valuated. Inoculation of corn seeds with A. brasilense increased plant height and grain yield. Fertilization in topdressing, with N levels up to 120 kg ha-1, linearly increased the foliar nutrients and productivity of corn cultivated in the spring/summer in the low-altitude Cerrado region of Brazil. (AU)