PJB-2018-161
ROLE OF PGPR IN THE RECLAMATION AND REVEGETATION OF SALINE LAND
Asadullah
Abstract
A field experiment was conducted to investigate the effect PGPR inoculation on growth and yield of maize as well as on reclamation of saline sodic soil of SSRI Pindi Bhattian Pakistan, during 205-16. In vitro analysis of microbes was carried out which showed that PGPR could metabolize ACC deaminase, solubilize insoluble phosphate and produce significant quantity of auxin in the presence of L-tryptophan. Inoculation of maize with PGPR along with application of 1Liter inocula / treatment in the field gave a significant (P = 0.05) increase in germination (76%), leaf chlorophyll (24%), proline (65%), anthocyanin (38%) and soluble sugar content (56%). Amongst PGPR, P.putida resulted a maximum increase in plant height (131.5cm), leaf area (570.8 cm2), no of grains cob-1 (459.8), 1000 grain weight (330.9 g) and grain yield (3.25 tha-1), followed by other PGPR. However, P.fluorescens was least effective. The rhizosphere soil analysed after harvesting exhibited significant decrease in ECe (49%), SAR (98%), and CEC (94%) concomitant with a significant increase in OM content (52%), NO3-N (37%), available P (48%) and K (31%). The highest efficiency of P.putida may be attributed to the maximum ACC deaminase activity, higher production of IAA and ability for Phosphate solubilization. PGPR induced decrease in the ECe and SAR concomitant with an increase in the OM content of rhizosphere soil render the saline soil productive.
To Cite this article:
Download
