Plant growth analysis describing the soybean plants response on dryland field to seed co-inoculation

Abstract

Plant growth analysis can be used for soybean plants evaluation to identify morphologic changes caused by soil microbes after seed inoculation. The objective was to measure changes of inoculated soybean plants grown under regular field Brazilian production conditions. The experiment was carried out to compare 5 inoculation treatments: T1 (Bradyrhizobium japonicum and B. diazoefficiens), T2 (T1 and Azospirillum brasilense), T3 (T1 and Trichoderma asperellum), T4 (T1 and T. virens, and Bacillus amyloliquefaciens) and T5 (T1 and Penicillum bilaiae). Leaf area, shoot and root dry matter were measured at vegetative and reproductive growth stages. Results of this study validate the contribution of plant growth analysis of soybeans plants for identifying their responses promoted by the combined inoculation of their seeds with selected microbes. Also, the microbial effects on plant growth vary not only between microbes but also between parts of the plants and through the plant development stages. The introduction of different microbes in soybean rhizosphere combined with Bradyrhizobium sp. strains can contribute to increase crop dry matter productivity during its growing cycle.

Microrganismos promotores de crescimento de plantas - Trichoderma e Azospirillum: otimizando a cultura do milho em sistemas integrados de produção agropecuária

“…Na cultura do milho, a coinoculação com Trichoderma e Azospirillum ainda precisa ser melhor estudada. Essa combinação de microrganismos pode melhorar a absorção de nutrientes, principalmente N, promover o desenvolvimento do sistema radicular e aumentar a resistência das plantas a estresses abióticos, podendo reduzir a dependência de fertilizantes químicos, o que, por conseguinte, resulta em economia de custos e menor impacto ambiental (BUSO et al, 2021;MASTAN et al, 2021).…”

Co‐inoculation of soybean with Bradyrhizobium spp. and Amazonian strains of Trichoderma asperellum and Bacillus amyloliquefaciens increases the productivity and profitability of the crop

“…Like the present study, Buso et al (2021) evaluated the co-inoculation of soybean with several microorganisms in southern Brazil, including strains belonging to T. asperellum and B. amyloliquefaciens other than those used in our study. However, no increase in soybean yield compared with standard inoculation, which could be attributed to the use of non-adapted strains, was found.…”

“…Other microorganisms, such as Pseudomonas (Afzal et al., 2010; M. A. Silva, Nascente, Filippi, Lanna, Silva, & Silva, 2020), Burkholderia (M. A. Silva, Nascente, Filippi, Lanna, Silva, Fernandes, et al., 2020), Actinomyces (Nimnoi et al., 2014), Bacillus (Atieno et al., 2012; R. D. A. C. Leite et al., 2022; Subramanian et al., 2014), Trichoderma (Bononi et al., 2020; Buso et al., 2021), and mycorrhizal fungi (Cofré et al., 2020; Igiehon & Babalola, 2017) are recognized as growth promoters that benefit soybean plants. These microorganisms provide additional benefits through processes such as BNF (Döbereiner, 1997), phosphate and potassium solubilization (Basak et al., 2020; Mahanta et al., 2014), and synthesis of siderophores (Yadav et al., 2020) and phytohormones (Fukami et al., 2018).…”