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Journal of Biological Sciences
Year: 2001  |  Volume: 1  |  Issue: 12  |  Page No.: 1112 - 1115

Potassium Deficiency and Response of Rice to its Application in Hafizabad District

S. M. Mehdi, G. Hassan, M. Sarfraz, M. Sadiq, N. M. Hassan and G. Shabbir    

Abstract: Potassium deficiency symptoms were observed on rice 1999 in a number of fields throughout the Hafizabad district. Soil and plant samples from 98 rice fields showing K deficiency symptoms were collected. These soil and plant sample were analyzed for K contents. All the 98 plant samples had low K contents according to critical limits while soil samples were tested medium in ammonium acetate (CH -CO-O-NH ) extractable K. In the same year K was applied to 3 4 rice crop @ 62.5 Kg haG showing K deficiency symptoms at 11 sites. The paddy and straw yields improved from 4.17 1 to 36.20 % and 2.94 to 40.0 % over control by the application of K, respectively. Similarly K concentration also increased in both paddy and straw over control, by applying K, from 18.75 to 36.59 % and 6.70 to 14. 46 % respectively. Potassium uptake by paddy and straw yields and total K uptake also increased by applying K over control.

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