Inoculation of Wheat With Azospirillum spp.: A Comparison Between Foliar and In-furrow Applications

Abstract

The present work aimed to evaluate the agronomic performance of wheat grown under no-tillage system and submitted to different doses and methods of inoculation with Azospirillum spp. Eight treatments were tested: 1) control; 2) half N dose; 3) full dose of N; 4) half N dose + standarded inoculation by seeds (200 mL ha-1); 5) half N dose + in-furrow inoculation (200 mL ha-1); 6) half N dose + in furrow inoculation (300 mL ha-1); 7) half N dose + inoculation by foliar spraying (200 m ha-1) and 8) half N dose + inoculation by foliar spraying (300 mL ha-1). The following parameters were evaluated: number of tillers per plant, number of grains per spike, shoot dry biomass, weight of thousand seed mass, hectoliter weight, nitrogen content in grains, nitrogen content in shoot dry matter as well as crop yield. Our results showed that the supply of the half dose of mineral N associated to foliar inoculation with Azospirillum at the dose of 300 mL ha-1 provided positive results on wheat yield, confirming the bacterial ability to fix N. However, only the full mineral N fertilization stood out as the best N fertilization management.

The Challenge of Combining High Yields with Environmentally Friendly Bioproducts: A Review on the Compatibility of Pesticides with Microbial Inoculants

“…Despite requiring that the farmers buy new equipment, 20% of the farmers in Brazil adopted this technique by 2020. Other strategies, with an emphasis on soil-spray and leaf-spray inoculation [57,86,134,135] have also been investigated and show some degree of effectiveness, but are not as effective as in-furrow and seed inoculations.…”

Upland rice seedling performance promoted by multifunctional microorganisms

“…Hungria (2011), working with soybean and common bean crops, also reported that bacteria of the genus Azospirillum could provide several stimuli for the growth of plants, in addition to biological N fixation, for the production of plant hormones such as auxins, gibberellins and cytokinins, phosphate solubilization, greater root development, increases in chlorophyll content and stomatal conductance. In addition, Correia et al (2019) found that supplying half a dose of mineral N in combination with leaf inoculation of an isolate of the genus Azospirillum at a dose of 300 mL ha -1 induced significant increases in wheat crop productivity.…”

“…development, increases in chlorophyll content and stomatal conductance. In addition, Correia et al (2019) found that supplying half a dose of mineral N in combination with leaf inoculation of an isolate of the genus Azospirillum at a dose of 300 mL ha -1 induced significant increases in wheat crop productivity.…”

Response of spring and facultative triticale on microbial preparation (Azospirillum brasilense and Bacillus polymyxa) by different nitrogen nutrition

“…Triticale cultivars had different reactions to the treatment with microbial preparations and the fertilizer system (Figure 5). (Correia et al, 2020).…”