Manuscript Abstract

COMPARISON OF SUITABLE EXTRACTANTS USED IN SOIL PHOSPHORUS TESTING ON DIFFERENT SOILS
S. U. Khan, T. H. Flower, Q. U. Khan, A. A. Khakwanı, O. U. Sayal, I. Bakhsh

S. U. Khan1,2, T. H. Flower2,  Q. U. Khan3 , A. A. Khakwanı4, O. U. Sayal5 and I. Bakhsh4

1Agriculture Research Institute, Dera Ismail Khan, Pakistan
2Department of Analytical and Environmental Chemistry, University of Glasgow, United Kıngdom.
3Department of Soil and Environmental Sciences, Gomal University Dera Ismail Khan, Pakıstan
4Department of Agronomy, Gomal University Dera Ismail Khan, Pakıstan
5Department of Plant Breeding and Genetics, Gomal University Dera Ismail Khan, Pakıstan

Corresponding Author: qudrat_ses@hotmail.com
Page Number(s): 113-118
Published Online First: February 01, 2018
Publication Date: February 01, 2018
ABSTRACT

The present study was carried out to compare the six Phosphate extractants applied on fourteen different soil types. The extractants used include Acetic acid, Sodium acetate buffer (Morgan solution), Ammonium acetate buffer (Modified Morgan’s solution), Sodium bicarbonate (Olsen extractant), Acidified ammonium fluoride (Bray – I reagent) and Anion Exchange Resin (AER). The fourteen soil were different in soil properties as pH, Organic matter content, Fe, Al and soil texture. The soil were grouped in to two on the basis of pH (acidic and alkaline). The results showed that Phosphate extracted by various extractant showed significant difference at 1% level of probability. The highest Phosphate concentration was measured in different soil by using the Bray I extractant. The lowest was determined in AER. Significant correlations have been found between the extractant except for Bray which showed non – significant correlation. Comparing the effectiveness of soil pH showed positive correlation between the extractants at pH range of 5.2 to 6.3. While at higher pH in range of 6.3 to 7.9 was non – significant. It may be concluded from the result that Bray I was effective in extracting P concentration from soil in acidic condition while Acetic acid and Sodium Bicarbonate (Olse reagent) were more effective under slightly acidic to alkaline condition.    

Keywords: Soil, Phosphate, Extractants, Alkaline soils, Acidic soils, correlations
Open Access: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( https://creativecommons.org/licenses/by/4.0/).


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