MYCORRHIZATION STIMULANT IN SOYBEAN ASSOCIATED WITH PHOSPHATE FERTILIZATION IN OXISOLS

Authors

  • Fabrício Ribeiro Andrade Department of Agronomy, Instituto Federal de Educação, Ciência e Tecnologia de Mato Grosso, Juína, MT http://orcid.org/0000-0003-1865-6502
  • Júlio César Azevedo Nóbrega Center of Agrarian Sciences, Environmental and Biological, Universidade Federal do Recôncavo da Bahia, Cruz das Almas, BA http://orcid.org/0000-0002-2726-8205
  • Rafaela Simão Abrahão Nóbrega Center of Agrarian Sciences, Environmental and Biological, Universidade Federal do Recôncavo da Bahia, Cruz das Almas, BA https://orcid.org/0000-0002-6717-1344
  • José Ferreira Lustosa Filho Department of Soil Science, Universidade Federal de Lavras, Lavras, MG http://orcid.org/0000-0001-6901-1718
  • Alan Mario Zuffo Sustainability in Agriculture, Universidade Estadual de Mato Grosso do Sul, Cassilândia, MS http://orcid.org/0000-0001-9704-5325
  • Fatima Maria de Souza Moreira Department of Soil Science, Universidade Federal de Lavras, Lavras, MG http://orcid.org/0000-0003-0159-5811

DOI:

https://doi.org/10.1590/1983-21252018v31n404rc

Keywords:

Glycine max (L.). Phosphorus. Arbuscular mycorrhizal fungi.

Abstract

The use of stimulants in the establishment of arbuscular mycorrhizal fungi has great potential in contributing to P uptake by plants. This study aimed to evaluate the effect of isoflavonoid formononetin as mycorrhization stimulant on soybean associated with phosphate fertilizer in Oxisols with intermediate (OPi) and low (OPl) phosphorus availability, in the Cerrado region of Piauí. The experiment in each soil consisted of randomized blocks design in a 4×4 factorial scheme, with four replications. The treatments comprised of four phosphorus doses (0, 26.66, 40 and 80 kg ha-1 P2O5), and four isoflavonoid formononetin doses (0, 0.5, 0.9 and 1.8 g kg-1 soybean seeds). The variables evaluated were soybean growth, yield, nodulation and mycorrhizal colonization rate. With the exception of mycorrhizal colonization rate in OPi, plant height and number of pods per plant in OPl, the other variables were not affected by the application of isoflavonoid formononetin, in both soils. Yield linearly increased with increase in the phosphorus doses in OPl, and presented agronomic efficiency of ~15 kg ha-1 grain for each kg ha-1 P2O5 applied to the soil.

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Published

16-10-2018

Issue

Section

Agronomy