Variability of selected chemical parameters in the soil profiles of Gleyic Fluvisols

Abstract

 

Changes of available phosphorus and potassium, total nitrogen, soil organic carbon were observed on gleyic Fluvisols at the following crops: winter wheat (2005),grain maize (2006), spring barley (2007), soya (2008), winter wheat (2009),grain maize (2010). Experiment was realized at three soil tillage technologies: conventional tillage, minimal tillage and no-tillage. Soil samples were collected from three depths (0.00 – 0.15 m; 0.15 – 0.30 m; 0.30 – 0.45 m). Ratio of soil organic carbon to total nitrogen was also calculated. Contents of available phosphorus and potassium, total nitrogen and soil organic carbon in observed soil depth. The highest content of above mentioned parameters were detected in the depth 0.00 – 0.15 m and the lowest in the depth 0.30 – 0.45 m. Difference between the first and the third soil depth was in available phosphorus 26,4 mg kg^-1, in available potassium 39.5 mg kg^-1, in total nitrogen content 329 mg kg^-1 and in soil organic carbon 2.48 g kg^-1.Soil tillage affects the content of available phosphorus and potassium in the soil significantly. The balance showed that content of available phosphorus and potassium increased about 2.5 – 4.3 mg kg^-1 P and 5.3 – 8.7 mg kg^-1 K.Tillage did not significantly affects the content of total nitrogen and soil organic carbon.