Research Article
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

Journal of Biological Sciences, 2001, 1(12), 1112-1115.

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.

ASCI-ID: 38-429

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