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Phosphorus Fractions in some Calcareous Soils of Egypt as Affected by Aging and their Properties

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Last updated: 01 Jan 2025

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Abstract

IDENTIFYING the predominate individual forms of inorganic P in soils is helpful in the determined potential availability of P in calcareous soils. Therefore, the current investigation was conducted to study the distribution of P amongst the different fractions of some calcareous soils as affected by the period of soil cultivation and also the extent to which some soil properties affect such a distribution. Fulfilling such objectives was executed by carrying out a P fractionation experiment whose results showed that AB-DTPA extractable fraction (available) was highly and significantly affected by Fe,Al-P fraction. Ca-P fraction was very much greater than the other P-fractions in all the investigated soils. Within all the investigated soils, the Fe-Al-bound fraction contained P in concentrations far lower than the Ca-bound fraction. Occluded- P was found in the lowest concentrations. The residual P fraction was found in quantities almost equal to or even exceeding the other total extractable fractions. Fe, Al-P fraction correlated at a high level of significance with each of the occluded-P and residual-P fraction as well as the total-P content. This means that Fe, Al-P fraction can be under certain circumstances converted to either of both of occluded and residual fractions. Occluded-P fraction showed highly significant correlations with each of Fe, Al-P and residual-P fractions and at the same time, it correlated but only at a significance level of 5% with total-P. Non- of the investigated P-fractions was affected by either of the studied properties solely but more than of these properties contributed together to affect the different soil P fractions. For example, Fe, Al-P correlated significantly with sand, silt, CaCO3 and EC while each of the occluded-P, residual-P and total-P content showed significant correlation with CaCO3, EC and CEC together. Ca-P fraction was affected by sand, clay and EC. The relationships between AB-DTPA extractable fraction (the available P fraction) and the different soil properties indicate that both silt and CaCO3 contents significantly and negatively affected the AB-DTPA extractable P. It can be deduced that the different soil properties, although varied in their contribution to determine the amount of AB-DTPA extractable P, yet the role of either of these properties cannot be neglected.

DOI

10.21608/ejss.2013.191

Keywords

P fractionation, Calcareous Soils, long-term fertilization, soil properties

Volume

53

Article Issue

4

Related Issue

60

Issue Date

2013-12-01

Receive Date

2016-10-03

Publish Date

2013-12-30

Page Start

555

Page End

566

Print ISSN

0302-6701

Online ISSN

2357-0369

Link

https://ejss.journals.ekb.eg/article_191.html

Detail API

https://ejss.journals.ekb.eg/service?article_code=191

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6

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Original Article

Type Code

19

Publication Type

Journal

Publication Title

Egyptian Journal of Soil Science

Publication Link

https://ejss.journals.ekb.eg/

MainTitle

Phosphorus Fractions in some Calcareous Soils of Egypt as Affected by Aging and their Properties

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Type

Article

Created At

22 Jan 2023