Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF FORESTRY-ISTANBUL UNIVERSITY, cilt.61, sa.1, ss.39-46, 2011 (ESCI, TRDizin)
Current study is based on the data collected in January 2010 from field under authorization of Catalca-Karacakoy the Chief Forest Enterprise located in the northern Istanbul. Net nitrogen mineralization rates were estimated at soils taken from mixed and thicket age (1.30 m empty set approximate to 20 cm) Oak sp. (Quercus frainetto Ten., Q. cerris L., Q. robur L. and Q. petraea (Mattuschka) Lieblein)) forest (OFL), shrub land (dominated with Cistus spp.) (SL), recently abandoned agricultural land (RAAL approximate to 5 y), old abandoned agricultural land (OAAL approximate to 20 y) by standard laboratory incubation method. Net N mineralization was by laboratory incubation method whereas soil humidity were suited to %60 in terms of weight and incubated at 21 degrees C. According to result we achieved: at pre-incubation stage the ammonium-N amounts at OAAL, shrub land and forest ecosystems were significantly higher than RAAL lands according to Tukey HSD p<0.05, while at post-incubation three to four fold higher net nitrogen mineralization was recorded according to Dunnett T3 p<0.05. Except RAAL lands, OAAL, SL and OFL were expected to deduce similarity, however, the actual results should be accounted for possibly higher microbial activity.