Efficiency of Bacillus subtilis Bs10 as a plant growth promoting inoculant in soybean crop under field conditions

Abstract

The growth of the Brazilian market for biological defensive follows a worldwide trend of reducing the use of pesticides in crops, due to international and societal demands for a more sustainable agriculture. The objective of the present work was to evaluate the efficiency of Bacillus subtilis Bs10 as an inoculant for the soybean crop, through the promotion of plant growth and productive performance in the field. Three field experiments were conduct in the municipalities of Porto Nacional and Formoso do Araguaia, Tocantins, Brazil. The treatments used in the experiments were five doses of the B. subtilis Bs10-based product (0, 100, 200, 300 and 400 mL 50 kg of seeds-1), plus one treatment with a commercial B. subtilis-based product. The inoculation of B. subtilis Bs10 provided increases in biomass, agronomic characteristics, plant population and productivity in soybeans under field conditions. There were positive results starting at a dose of 200 mL, with gains in productivity ranging from 28 to 41% in relation to the absolute control treatment, without inoculation of B. subtilis, and from 11 to 42% in relation to the treatment with commercial product. The bio formulated B. subtilis Bs10 should be recommend as a plant growth promoting inoculant in soybean.

Efficiency of Bacillus subtilis UFMT-PANT001 as a plant growth-promoting inoculant in soybean in the field

“…In this case, it was observed that B. subtilis may have positively influenced N2 fixation by Bradyrhizobium, increasing plant growth and N accumulation in soybean. Other studies have shown the positive effect of plant growth by rhizobia and Bacillus coinoculation in soybean (BragaJunior et al, 2018;Braga Junior, 2019;Chagas Junior, Chagas, Martins, Colonia, Sousa, & Braga Junior, 2021a), cowpea, corn and rice(Chagas, Martins, Carvalho Filho, Miller, Oliveira, & Chagas Junior, 2017).Similar results were also reported byMohamed et al (2018) andKalam et al (2020) for tomato, byGuimarães, Klein, Silva, e Klein (2021) for maize, bySantos et al (2021) for oat and byRezende et al (2021) for bean.…”

Efficient dose of Bacillus subtilis UFMT-Pant001 as a plant growth promoter in soybean under greenhouse conditions

“…In Experiments 1 and 2, the treatments with B. subtilis UFMT-Pant001 provided positive nodulation results compared to the absolute control treatment. Studies have shown that with B. subtilis does not affect nodulation in soybean plants, that Bacillus metabolites are probably not toxic to rhizobia, and that coinoculation may even influence the increase in nodulation (Braga Junior et al, 2017Chagas Junior et al, 2021, 2022a. This influence may be due to increased competitiveness of the inoculated bacteria, an increased number of infection sites, and the inhibition of the growth of pathogenic fungi in the roots.…”

Bacillus subtilis UFMT-Pant001 as a plant growth promoter in soybean in a greenhouse

“…Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License organisms in agricultural practices has increased significantly. Microorganisms are potential substitutes for chemical products to promotion of plant growth and the biological control of pests and plant diseases, among other applications that potentially favoring reduced costs and preserving the environment (Braga et al, 2018;Dias et al, 2019;Chagas Junior et al, 2021). These micro-organisms, known as plant growthpromoting rhizobacteria (PGPR), provide several benefits to plants, such as increases in seed germination rates, root growth, grain number, leaf growth, leaf area, nutrient content, and drought tolerance and delays in leaf senescence, and in addition, they also can serve as biocontrol of diseases through direct action against a pathogen and indirect action that makes a plant more resistant (Melo, 2015;Contreras-Cornejo et al, 2016;Zeilinger et al, 2016;Lima et al, 2019).…”