Co-Inoculation of Rhizobacteria and Biochar Application Improves Growth and Nutrientsin Soybean and Enriches Soil Nutrients and Enzymes

Abstract

Gradual depletion in soil nutrients has affected soil fertility, soil nutrients, and the activities of soil enzymes. The applications of multifarious rhizobacteria can help to overcome these issues, however, the effect of co-inoculation of plant-growth promoting rhizobacteria (PGPR) and biochar on growth andnutrient levelsin soybean and on the level of soil nutrients and enzymes needs in-depth study. The present study aimed to evaluate the effect of co-inoculation of multifarious Bradyrhizobium japonicum USDA 110 and Pseudomonas putida TSAU1 and different levels (1 and 3%) of biochar on growth parameters and nutrient levelsin soybean and on the level of soil nutrients and enzymes. Effect of co-inoculation of rhizobacteria and biochar (1 and 3%) on the plant growth parameters and soil biochemicals were studied in pot assay experiments under greenhouse conditions. Both produced good amounts of indole-acetic acid; (22 and 16 µg mL−1), siderophores (79 and 87%SU), and phosphate solubilization (0.89 and 1.02 99 g mL−1). Co-inoculation of B. japonicum with P. putida and 3% biochar significantly improved the growth and nutrient content ofsoybean and the level of nutrients and enzymes in the soil, thus making the soil more fertile to support crop yield. The results of this research provide the basis of sustainable and chemical-free farming for improved yields and nutrients in soybean and improvement in soil biochemical properties.

Production, Purification, and Characterization of Bacillibactin Siderophore of Bacillus subtilis and Its Application for Improvement in Plant Growth and Oil Content in Sesame

“…Considering their ability in crop improvement, they are used as a substitute for chemical application in agriculture. Most of the rhizosphere bacteria secrete secondary metabolites called siderophores which act as chelating agents for ferric iron, produced under low iron stress [51][52][53][54][55].…”

Production of Plant Beneficial and Antioxidants Metabolites by Klebsiellavariicola under Salinity Stress

“…Soil salinity is an increasing problem worldwide for about 27% of the world’s arable land [ 6 ]. Plant growth in these soils is adversely affected by both excess salts and excess sodium levels [ 7 ]. Saline soil prevents the normal growth of crops and results in poor crop yield [ 7 ].…”

“…Plant growth in these soils is adversely affected by both excess salts and excess sodium levels [ 7 ]. Saline soil prevents the normal growth of crops and results in poor crop yield [ 7 ]. The effects of soil salinization are more detrimental, particularly in arid and semi-arid regions.…”

“…The various conventional methods of ameliorating soil salinity have provided some success, but they show negative impacts on soil health [ 6 ]. A sustainable agriculture practice demands effective and eco-friendly measures to combat these issues without compromising soil health [ 7 ]. In this context, the application of plant growth-promoting rhizobacteria (PGPR) has proved the best alternatives to agrochemicals and effective bioinoculants to promote plant growth in saline soils [ 1 ].…”

The Chemical Element Composition of Turmeric Grown in Soil–Climate Conditions of Tashkent Region, Uzbekistan

“…The NPK + BZnFe (100:75:75:3:6:6 kg/ha) treatment significantly increased active P content by 40%, total P content by 38% and total K content by 22% in comparison to the control without mineral fertiliser. Several other authors also reported the nutrient contents in the soil before and after plant cultivation [ 39 , 40 ]. Some other studies about poultry manure showed limitations so that NPK alone or with a combination of other nutrient fertilisers could increase the essential macronutrients in soil [ 41 ].…”