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Abstract of the Article

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Investigation of P concentration and its transport to surface waters using calcium Chloride Solution

Authors:
[ Hamed Pashamokhtari ] -
[ Alireza HosseinPour ] -

Abstract:

P concentration and its transport to surface waters depend on the capacity of soil in release of P to soil solution. The kinetics of P release in soils is a subject of importance in soil and environmental sciences, thus, kinetic information is required to properly characterize the P supplying capacity of soils, to design fertilizer-P management to optimize efficiency, to reduce environmental pollution. Ten soil samples had wide range in available P, calcium carbonate equivalent and clay contents, were extracted using calcium chloride 0.01 molar over a period of 1560 h. Results showed that P release was rapid at first and then became slower. Zero-order, first-order, second-order, power function, Elovich and parabolic diffusion law kinetics models were tested to describe P release in the soils. Results showed that Elovich, first-order, power function and parabolic diffusion kinetics models could well describe P release in the soils.

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