Growth responses of Brassica juncea to phosphorus application from different sources of fertilizer under salt stress

Abstract

Under salt-stress conditions, available phosphorus may not be in adequate amounts or in accessible forms for timely utilization by plants. This study was carried out to observe the growth and Na+ /K+ ratio in Brassica juncea having phosphorus supplied from commercial fertilizers under salt stress. Seeds of Brassica juncea (cv. Raya Anmol) were germinated and the seedlings raised in standard nutrient solution under controlled conditions. Phosphorus was applied from three sources of fertilizers i.e. DAP, SSP and TSP @ 2 (as control) and 10 mmol L-1. Salt stress was developed with NaCl (150 mmol L-1). Under salt stress and elevated P application as SSP and TSP, fresh mass was higher than with DAP source. Dry mass was higher with SSP source than with DAP and TSP. Na+ /K+ ratio was low using SSP. P-uptake by the plants was highest using TSP. For growth parameters and Na+ /K+ ratio, phosphate fertilizers contributed differentially under salt stress.

Keywords

• B. juncea growth
• P- fertilizer
• salt stress
• Na+ /K+ ratio