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Effects of stubble burning on nitrogen mineralization in wheat soil Nacide Kızıldağ1* Şahin Cenkseven2 Burak Koçak3
Hüsniye Aka Sağliker4 Cengiz Darici3
1: Cukurova University, Central Research Laboratory, Adana, Turkey 2: Cukurova University, Faculty of Agriculture, Adana, Turkey 3: Cukurova University, Faculty of Arts and Sciences, Adana, Turkey
4: Osmaniye Korkut Ata University, Faculty of Science and Arts, Osmaniye, Turkey *: nkizildag@cu.edu.tr
Nitrogen mineralization is the process which soil total nitrogen (N) is conversion into plant available inorganic forms. Several factors affect nitrogen mineralization rates, particularly temperature, moisture and soil depth. An understanding of these parameters is necessary to supply crop N demands for plant production with total N in the soil. Wheat is one of the most important plant that growing in Turkey and plays a vital role as a food source for providing the food grain production. This production require healthy and fertile soils which should have nitrogen contents in a normal level for optimum crop yield. The aim of this study was to determine the nitrogen mineralization in different depths (0 - 5 and 5 - 10 cm) of wheat soils (Triticum vulgare Vill.) which were sampled before and after stubble burning in Çukurova (Adana, Turkey). Some physical, chemical and biological properties of wheat soils in effects of stubble burning were determined. Soils were sandy loam (SL) and slightly alkali while no significant differences were observed between each parameters (P > 0.05). Soil organic C and total N were decreased as soil depth increases. Both ammonium (NH4-N) and nitrate (NO3-N) contents were increased with increasing time (11, 26 and 42 days) while NO3-N contents in the soil after stubble burning (0-5 cm) was higher than control soil (0-5 cm). In conclusion, nitrogen mineralization should be considered as an important indicator for soil fertility after stubble burning effects. Keywords: stubble burning, wheat, nitrogen mineralization, soil depths, Çukurova
