Seasonal variation of some quality attributes in soil and sediment in loess derived soils of eastern area of Golestan Province

Message:
Abstract:
High ratios of erosion and sediment in eastern area of Golestan province have reduced soil fertility and dams capacity. Temporal variation of chemical soil quality indicators has to be studied for evaluation of soil degradation by erosion. Therefore, this study was conducted to evaluate soil and sediment quality indicators in different seasons in loess derived soils, in the Eastern area of Golestan province. Soil samples were taken from each season to analyse chemical properties in Gharnaveh and yelcheshmeh watersheds. Samplings of sediments were monthly for one year from the outlet of watershed basins mentioned as Tamer hydrometric station. The results showed the highest total nitrogen (0.16%) and soil organic matter (3.6%), were observed in autumn. The effect of season on soil phosphorus and potassium was significant (P>0.05), so the maximum amount of phosphorus (5 mg/kg) and available potassium (108 mg/kg) were observed in summer. About the status of nutrients in the sediment, this study showed that total nitrogen in the autumn, have a maximum amount and there was a significant difference between spring and autumn. The maximum amount of phosphorus (amount 4.9 ppm) was observed in winter. Most of the sediment organic matter and available potassium were observed in summer and spring. The results showed that there was a correlation between although maximum of nitrogen and potassium in soil and sediment, but in universal view, changes in soil nutrients and sediment, during different months of the year is not consistent.
Language:
Persian
Published:
Water and Soil Conservation, Volume:19 Issue: 4, 2013
Page:
157
https://magiran.com/p1100587  
سامانه نویسندگان
  • Meftah Halaghi، Mehdi
    Author (3)
    Meftah Halaghi, Mehdi
    Associate Professor Water Engineering, Soil and Water Faculty, Gorgan University, گرگان, Iran
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