中国P站

Abstract

Limited nutrients availability along with drought stress serves as critical concerns in modern agriculture. Both biotic as well as abiotic stress factors possess capabilities to retard and decline overall productivity. However, various organic and inorganic fertilizers may bring resistance in crops striving hard under nutritional or drought stress for survival. Although in stress conditions, few rhizobacterial strains are capable of strengthening root architecture development leading to efficient nutrient as well as water uptake. In order to identify knowledge cracks of correlational outcomes of rhizobacteria and NPK fertilizers, present study was preceded. The goal of current experiment was to cross examine the competence of solitary and integrated usage of rhizobacteria and NPK fertilizer for countering nutritional and drought stress in barley. Nitrogen fixing and phosphorus solubilizing bacteria Pseudomonas aeruginosa (108 cfu ml−1) was inoculated to barley with and without NPK fertilizer. Results revealed that NPK+NPB significantly increased fresh and dry weight, lengths of barley root and shoot along with enlargement of photosynthetic pigment contents. A significant uplift in total soluble sugars, total soluble proteins and net photosynthesis verified the efficacy of NPK+NPB in comparison to control. Significant decline in sodium, proline, flavonoids, malondialdehyde, hydrogen peroxide, Catalase (CAT) and Ascorbic Acid (AsA) concentrations in barley raised under drought stress conditions justifies incumbent role of NPK and NPB treatments. In conclusion, NPK +NPB can mitigate nutritional stress and drought issues in barley. Further in depth analysis is needed to affirm NPK +NPB as positive impactive amendment contrary to drought stress in discrete agro-ecological zones, varying soil types and comparing barley cultivars globally.

Keywords: Rhizobacteria, Barley, Chlorophyll contents, Catalase, Fertilizer