Changes in Soil Ergosterol Content, Glomalin-Related Soil Protein, and Phospholipid Fatty Acid Profile as Affected by Long-Term Organic and Chemical Fertilization Practices in Mediterranean Turkey


TURGAY O. C., Buchan D., Moeskops B., De Gusseme B., ORTAŞ İ., De Neve S.

ARID LAND RESEARCH AND MANAGEMENT, cilt.29, sa.2, ss.180-198, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 2
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/15324982.2014.944246
  • Dergi Adı: ARID LAND RESEARCH AND MANAGEMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.180-198
  • Anahtar Kelimeler: phospholipid fatty acids, organic fertilization, glomalin, soil fungi, ergosterol, arbuscular mycorrhiza, ARBUSCULAR MYCORRHIZAL FUNGI, MICROBIAL COMMUNITIES, AGRICULTURAL MANAGEMENT, AGGREGATE STABILITY, ENZYME-ACTIVITIES, COMPOST ADDITION, NUTRIENT-UPTAKE, CROP-ROTATION, CARBON, BIOMASS
  • Ankara Üniversitesi Adresli: Evet

Özet

The present study examines the effects of different fertilization treatments (chemical fertilization, farmyard manure, plant compost, and mycorrhiza-inoculated compost) on the soil fungi under a crop rotation of wheat (Triticum aestivum L.) and corn (Zea mays L.) in a long-term field experiment established in Mediterranean Turkey in 1996. Soil samples were collected in May, August, and October 2009. Soil pH, organic carbon, plant-available nitrogen and phosphorus, mycorrhizal colonization, and a series of biochemical markers (phospholipid and neutral lipid fatty acid [PLFA and NLFA] profiles, soil ergosterol content, and glomalin related soil protein [GRSP] as indicators of abundance of bacteria, saprotrophic, and arbuscular mycorrhizal [AM] fungi) were assessed. No significant difference was observed in soil organic C and plant available N in relation to long-term fertilization treatments, but plant available P in soil changed significantly in relation to the fertilization treatment used and the sampling season (between 11.5-33.8mg center dot kg(-1) in spring, 10.4-28.6mg center dot kg(-1) in summer, and 10.5-33.2mg center dot kg(-1) in autumn). Mycorrhizal colonization patterns were similar for both plants. However, mycorrhiza-inoculated compost treatment exhibited higher root colonization (77.3%) over control (16.3%), chemical fertilization (10.0%), farmyard manure (19.3%), and plant compost (20.0%). No statistically significant change was observed in ergosterol content. The effect of long-term organic treatments on soil PLFA structure was statistically prominent; whereas seasonality only affected bacterial PLFAs. Organic fertilization increased GRSP (mean annual ranging from 0.91 to 2.46mg center dot g(-1) total GRSP) but long-term annual mycorrhizal inoculation had no significant effect on the soil GRSP pool.