ROLE OF FREEZE-THAW CYCLES IN AVAILABLE Fe LEVELS OF SOME HIGHLAND SOIL ORDERS
FRESENIUS ENVIRONMENTAL BULLETIN, cilt.29, sa.1, ss.62-69, 2020 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 29 Sayı: 1
- Basım Tarihi: 2020
- Dergi Adı: FRESENIUS ENVIRONMENTAL BULLETIN
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Agricultural & Environmental Science Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, Environment Index, Geobase, Greenfile, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
- Sayfa Sayıları: ss.62-69
- Atatürk Üniversitesi Adresli: Evet
Özet
Frequency and efficiency of freeze-thaw cycles (FTTCs - freezing and thawing treated cycles) are increasing over soils of cold regions or high altitudes as a natural outcome of global warming. Such cases result in significant changes in available macro and micro nutrient contents of soils. Very little information is available about the effects freeze-thaw cycles have on the availability of soil micronutrients. Therefore, the present study was conducted to determine the effects of frequency of freeze-thaw cycles on available micro nutrient contents of Pellustert, Argiustoll, Haplustept, Fluvaquent and Calciorthid large soil orders of Northern Turkey. Results revealed significant effects of freeze-thaw cycles on available micro nutrient contents of soils mostly based on soil characteristics. The highest Fe content was observed in step 3 of Pellustert soil order (Step 3; each soil was kept at -10, -15, and -20 degrees C for a month, at -10 degrees C for 15 days, -5 degrees C for 15 days, 0 degrees C for 15 days, then thawed at +2.5, +5, +7.5 and 10.0 degrees C for 18 hours. This freeze-thaw cycle was repeated 3, 6, and 9 times). It was concluded that the effects of freeze-thaw cycles on Fe availability varied mainly based on soil characteristics and increased frequency of freeze-thaw cycles increased Fe-fixation to soil.