Effect of different salts in Potassium release in soil

M. N. Al-Azawi, Kadhim

	Effect of different salts in Potassium release in soil
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 13, Issue 1, 2013, Pages 247-254
Author
Kadhim M. N. Al-Azawi
Abstract
A factorial experiment under the RCBD in three replicates was carried out in the Department of Soil Sciences and Water Resources , College of Agriculture , University of Baghdad in a silt loam soil classified as typic Torrifluvents subgroup, to disclose the effect of different salts in the native and adsorbed potassium release in soil. The experiement included two splits , the first one without planting , and the second one with barley planting using 7Kg plastic pots. Pots were irrigated after losting 50% available water with river water until the plants reached 10 cm length then they were irrigated with different types of water : river water , well water , ammonium sulphate , magnesium sulphate , calcium chloride and sodium chloride. Salt solutions were added at EC value of 8 dS.m-1. Soil samples were taken in three periods : one month later , two months later , and at harvesting (after five months). Potassium was measured after being extracted by two types of extraction solutions :0.01M calcium chloride and 1N ammonium acetate.Results showed the difference in potassium release (native and absorbed) due to the difference in salt treatments and the type of extraction solutions. The highest quantity of released potassium was in ammonium sulphate treatment , extraction treatment of ammonium acetate gave the highest quantity of released potassium after one month of planting , while the calcium chloride extraction solution gave the highest potassium quantity of released potassium after two months of planting and at the harvesting periods.
Keywords
Soil; Potassium

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