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  Pak. J. Bot., 39(4): 1083-1087, 2007

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  Updated: 09-07-09
   

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

ABIDA AKRAM1, MUSSARRAT FATIMA1, SAFDAR ALI2, GHULAM JILANI2AND REHANA ASGHAR1,*

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


   
         
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