PJB-2023-23
Integrated effect of phosphate solubilizing bacteria with organic and inorganic sources of nutrients on yield and nutrient uptake by
Kashif Khan
Abstract
An experiment was carried out at the Research Farm, The University of Agriculture Peshawar, during 2022, with a purpose to assess the “Integrated effect of phosphate solubilizing bacteria with organic and inorganic sources of nutrients on yield and nutrient uptake by maize”. The “Azam” variety of maize was sown for this purpose. The inorganic source of fertilizer was rock phosphate (RP) and the levels were 60 and 90 kg ha-1, while the organic source was poultry manure (PM) and levels were 4 and 6-ton ha-1. The research was carried out by Randomized Complete Block Design with split plot arrangement having three factors. Rock phosphate and poultry manure were applied before sowing while the PSB was applied by inoculating the maize seed with it. Statistical (p≤0.05) analysis of the data revealed that significant impact was found on all agronomic parameters by various organic and inorganic sources along with phosphate solubilizing bacteria. Maximum grain yield (4012 kg ha-1), biological yield (9793 kg ha-1), thousand grain weight of (303 g) and plant height (192 cm) were recorded in the plots where 90 kg ha-1 rock phosphate added with 6-ton ha-1 poultry manure when averaged across the fertilizer’s levels. Higher grain yield (3946 kg ha-1), biological yield (9422 kg ha-1) thousand grains weight (288 g) and plant height (169 cm) were observed in those plots that were supplemented with by the inoculation of phosphate solubilizing bacteria as compare to uninoculated treatment. Parameters of soil and plant were found to be influenced significantly (p≤0.05) with various organic and inorganic sources along with inoculation of phosphate solubilizing bacteria. Lowest soil pH value (7.52) was noted in the treatment 6 t PM was applied with the PSB, while maximum organic matter content (0.79%), soil total N (0.061%), soil extractable P of 0.061 mg kg-1 and extractable K content (72.64mg kg-1) in the plots supplemented with 90 kg ha-1 rock phosphate along with 6 t ha-1 poultry manure across the fertilizes sources. Maximum soil total N of 0.077%, extractable P content of 5.42 mg kg-1 and extractable K content of 78.80 mg kg-1, was noted from plots supplemented with 90 kg ha-1 rock phosphate added with 6 t ha-1 poultry manure with the inoculation of PSB. Maximum plant N concentration of 1.28%, extractable plant P content of 0.306 mg kg-1 and extractable plant K content of 1.66 mg kg-1, was noted from plots supplemented with 90 kg ha-1 rock phosphate added with 6 t ha-1 poultry manure with the inoculation of PSB. Application of 90 kg ha-1 rock phosphate with 6 t ha-1 PM with suggested PSB inoculation has expressed promising potential to enhance maize yield and NPK concentration in soil and plant. Results suggest that inoculation of maize with PSB have the potential to improve P solubility from RP and PM and enhance maize yield and its NPK concentration.
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