Journal of Environmental Biology

Impact of method of application and concentration of potassium on yield of wheat

J.A. Wani* M.A. Malik, M.A. Dar, Farida Akhter and S.K. Raina

Division of Soil Science, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Shalimar Srinagar -190 025, India

*Corresponding Authors Email : javaidwani@rediff.com

Publication Data

Paper received:

29 June 2012

Revised received:

11 September 2013

Accepted:

03 December 2013

Abstract

A field experiment was conducted to study the effect of different levels and methods of potassium application on yield, K uptake and forms of potassium in wheat crop at experimental field of Division of Soil Science, Sher-e-Kashmir University of Agricultural Sciences and Technology, Kashmir. The treatment consisted of 5 levels of potassium (0, 20, 40, 60 and 80 kg K₂O ha^-1) and two methods of application viz Single basal and split (1/2 basal+1/2 at tiller initiation stage). Out of various treatments, split application of potassium @ 80 kg K₂O ha^-1 was found superior to single basal application in terms of grain yield (43.20 q ha^-1) and K uptake (22.89 kg ha^-1) by grains at harvest. However, it was at par with split application of 60 kg K2O ha-1. All forms of potassium viz water-soluble, exchangeable, available, boiling HNO3 extractable and lattice increased with increasing levels of potassium and were found maximum (3.20, 62.80, 66.00 ppm 0.723 and 1.440 % respectively ) when potassium was applied @ 80 kg K₂O ha^-1 in two equal splits except for lattice K which was maximum (1.440 %) when potassium was applied @ 60 kg K₂O ha^-1 ??

 Key words

K-uptake, Potassium, Wheat, Yield

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