Abstract
Elevated use of agrochemicals has been the backbone of sustainable crop production. However, the environmental hazards, soaring cost and stagnant production are the foremost issues affiliated with them. Exploitation of stumpy cost and environment friendly plant growth promoting rhizobacteria (PGPR) has certain encouraging results regarding sustainability in agricultural production. A glass house study was conducted at Soil Bacteriology Section, Ayub Agricultural Research Institute, Faisalabad to check the efficacy of different PGPR for growth and yield of okra (Abelmoshuses culentum). Treatments were control, Azotobacter sp inoculation, Azospirillum sp inoculation, Bacillus sp inoculation, Pseudomonas sp inoculation and Rhizobium sp inoculation. Results revealed that there was significant effect of all inoculants on growth and yield of okra crop. An increase of 23.5% and 21.0% in green pod yield was recorded with Pseudomonas sp and Bacillus sp, respectively. Positive consequence was observed in all other parameters where Pseudomonas inoculation was applied as compared to no inoculation. This study suggests that PGPR may be a dynamic biofertilizer to boost the yield of okra and other agricultural crops.
Highlights
Influential role of soil beneficial microorganism is restricted to plant growth and have a key function in sustainable agriculture development and environmental protection
Response of bioinoculants on okra growth and yield is shown in Table 1, and 2
The results exposed that plant physiology and growth can be enhanced by Plant growth promoting rhizobacteria (PGPR) inoculation
Summary
Influential role of soil beneficial microorganism is restricted to plant growth and have a key function in sustainable agriculture development and environmental protection. Plant growth promoting rhizobacteria (PGPR) that resides in the rhizosphere of plants, increase growth by direct and indirect mechanisms like nitrogen fixation, solubilization of nutrients (P, K, Zn etc.) and siderophore production etc. Azotobacter, Azospirillum, Bradyrhizobium, Mesorhizobium, and Bacillus are considered as the efficient PGPR strains for their aptitude to execute as biofertilizer by Vessey., [39] These bacteria build colonies in rhizosphere to form relationship on the external surface or even intercellular spaces of roots McCully., [26]. Instead of chemical fertilizers, use of various plant growth promoting, symbiotic and non-symbiotic nitrogen fixing bacteria in soil, may improve crop yield Vessey., [39]. The significant focus of PGPR use in agriculture has been the rising demand of food and improving environment quality Dobbelaere et al, [35] These PGPR are effectively being used in raising all agricultural crops, fruits and vegetables. The present study was meant to assess the response of different plant growth promoting microbes on growth and yield of okra
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