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GROWTH, YIELD AND NUTRIENTS UPTAKE OF SORGHUM IN RESPONSE TO INTEGRATED PHOSPHORUS AND POTASSIUM MANAGEMENT

ABIDA AKRAM¹, MUSSARRAT FATIMA¹, SAFDAR ALI², GHULAM JILANI²AND REHANA ASGHAR^1,*

Abstract: Field experiment was undertaken to establish a balanced nutrients management for improved and economical production of sorghum. It was grown with P₂O₅ (80 kg ha^-1) and K₂O (40 kg ha^-1) as their sole and combined fertilization along with uniform level of N (120 kg ha^-1). Results indicated that P enhanced the crop growth, yield and nutrients uptake more than K and the best results were observed with their combined application. Maximum biological and grain yield were 31.7 and 2.26 t ha^-1 under P+K. Uptake of N, P and K was also highest with P+K.  Fertilizer use efficiency was highest for K alone (9.65 kg kg^-1) followed by P alone (8.45 kg kg^-1). Economic analysis showed maximum net return (NR) and relative increase in income (RII) with P+K treatment, while the value cost ratio (VCR) was slightly higher for P alone.  Integration of P and K was better than used alone for improved and economical production of sorghum

¹Department of Botany, University of Arid Agriculture, Rawalpindi, Pakistan

²Department of Soil Science, University of Arid Agriculture, Rawalpindi Pakistan

^*Corresponding author: E-mail: rehanauaar@yahoo.com