Coinoculation with plant growth-promoting microorganisms as a sustainable tool for the growth and development of peanut crop

• Grant number: 23/17926-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2024
• End date: April 30, 2026
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal Investigator: Fernando Shintate Galindo
• Grantee: Ana Cecília Capelari
• Host Institution: Faculdade de Ciências Agrárias e Tecnológicas. Universidade Estadual Paulista (UNESP). Campus de Dracena. Dracena , SP, Brazil

Abstract

Although it is not yet a practice adopted by the majority of peanut producers, and few studies have been carried out on the subject, the use of plant growth-promoting microorganisms (MPCPs) represents great potential for the crop, especially in tropical conditions, and can promote benefits in the growth and development of peanuts, with an impact on grain productivity. Considering the benefits seen in several crops with the inoculation of MPCPs, especially due to the phytohormonal effect acting directly on promoting plant growth, development of the root system, and consequently greater absorption and use of water and nutrients, in addition to the potential for increasing FBN and in the solubilization and efficiency of use of nutrients applied via fertilizers, it is believed that coinoculation with Bradyrhizobium sp. together with MPCPs, such as Azospirillum brasilense, Bacillus aryabhattai and Trichoderma harzianum can favor the development of the crop, and consequently grain productivity. The present work aims to evaluate the effect of coinoculations with plant growth-promoting bacteria and the fungus T. harzianum on the growth, development and productivity of peanuts. The research will be carried out in the municipality of Dracena - SP, in a typical dystrophic Red Argisol with a sandy texture.The experiment will be carried out in randomized blocks with four replications and 9 treatments: 1) control - without inoculation; 2) co-control - inoculation only with Bradyrhizobium sp.; 3) inoculation with Bradyrhizobium sp. + A. brasilense; 4) inoculation with Bradyrhizobium sp + Bacillus aryabhattai; 5) inoculation with Bradyrhizobium sp + Trichoderma harzianum; 6) Bradyrhizobium sp + A. brasilense + B. aryabhattai; 7) Bradyrhizobium sp + A. brasilense + T. harzianum; 8) Bradyrhizobium sp + B. aryabhattai + T. harzianum; 9) Bradyrhizobium sp + A. brasilense + B. aryabhattai + T. harzianum. All treatments will be applied sprayed over the total area at the beginning of vegetative development, 10 days after emergence (V1/V2). The leaf chlorophyll index (ICF), gas exchange parameters (IRGA), dry mass in shoots and roots at the beginning of gynophore development (R2) and dry mass of shoots, production components, grain productivity in shelled and shelled and grain yield at the end of the cycle (R8-R9), as well as N accumulation in shoots and grains will be evaluated.