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Effect of sedimentary pyrites and Zn application on yield, Zn and Ca nutrition of rice and wheat crops and on amelioration of saline sodic soil

Published online by Cambridge University Press:  27 March 2009

K. N. Tiwari ,
A. N. Pathak  and
G. P. Upadhyay
K. N. Tiwari
Affiliation:
Department of Soils and Agricultural Chemistry, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur-208002, India
A. N. Pathak
Affiliation:
Department of Soils and Agricultural Chemistry, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur-208002, India
G. P. Upadhyay
Affiliation:
Department of Soils and Agricultural Chemistry, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur-208002, India
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Summary

A field experiment was conducted on a saline sodic soil at Kanpur to study the effects of sedimentary pyrites and Zn on the yield, Zn and Ca utilization by rice and wheat crops and on the amelioration of saline sodic soil. The grain yield of the first crop of rice increased from 1·55 t/ha for the ‘control’ to 3·44 and 4·01 t/ha with the 40 and 80% gypsum requirement pyrites treatments. The grain yield of succeeding wheat and rice crops also increased significantly owing to pyrites residues. The favourable effect of pyrites on crop yield was associated with an appreciable decrease in the pH, electrical conductivity and exchangeable and soluble sodium content of the soil resulting in greater utilization of Zn and Ca by the crops. Zinc applications also greatly increased grain yield and Zn uptake by the crops. The higher levels of pyrites with adequate N, P and K fertilizers but without Zn did not give yields that were obtained by adding 11 kg Zn/ha.

Significant yield responses were observed in the succeeding wheat and rice crops to Zn residues from the higher Zn treatments. The ‘pyrites+Zn’ treatment was most effective in decreasing the Na content and enhancing Ca uptake which increased the Ca/Na ratio in plants. The Zn treatment alone also decreased soil pH, electrical conductivity and exchangeable Na.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 99 , Issue 2 , October 1982 , pp. 411 - 416
Copyright
Copyright © Cambridge University Press 1982

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