تحولات معادن المايكا و أثرها في جاهزية البوتاسيوم عند بعض ترب محافظة بابل

الملخص EN

The research included the study of some traditional, thermodynamic and reciprocal characteristics in order to assess the availability of potassium in some soils related to Al-Hillah city in Babylon province between 436724° to 464299°E and 3575183° to 3608757°N.Its relation to potassium-carrier minerals and transformations occurring in mica minerals on surface horizons which consider more contact with environmental conditions and factors.

Where the concentration of dissolved potassium in the surface horizons soils ranged from 0.02 to 0.10 cmol kg-1, and the quantity of reciprocal potassium between 0.17 to 0.37 cmol kg-1.

Accordingly, the quantity of available potassium was between 0.22 and 0.47 cmol kg-1.

The activation energy and effectiveness of potassium have revealed a state of equilibrium in potassium between the solid and liquid conditions of soil with values ranging from 0.0015 to 0.0086 (mol L-1) 1/2, and between (3835-) to (2817-) Cal mol-1 respectively.

Gabon's preference coefficient has disclosed that the potassium is of connected with edges type, which ranged from 1.12 to 6.92 L mol-1/2.

The proportions of feldspars minerals ranged from 1.3 to 3.8% and mica minerals, consisting of muscovite and biotite, ranged from 11.91 to 19.17%, in heavy and light sand components respectively.

The results of X-ray showed the basal distance of 12.06 and 12.26A°, with wide and broad peaks, confined between the two diffractions of mica mineral of 10A° and montmorillonite metal of 14A°, this indicates the presence of irregular and interstratified minerals resulting from the transformation of mica minerals towards the expanded smectite minerals (2:1).The minerals proportion resulting from its transformations in soil was between 7.65 to 17.67%.

The results of XRD did not appear any transformations in mica minerals under subsurface horizon clays of soil pedon1.