Nitrogen mineralization in the oldest climax communities in the eastern Mediterranean region  

作　　者：Fatma Selcen Sakar Gürcan Güleryüz 

机构地区：[1]Department of Biology,Section Ecology Görükle,Graduate School of Natural and Applied Science,University of Bursa Uludağ,16059 Nilüfer,Bursa,Turkey [2]Department of Biology,Section Ecology Görükle,Faculty of Science and Arts,University of Bursa Uludağ,16059 Nilüfer,Bursa,Turkey

出　　处：《Journal of Forestry Research》2024年第1期213-228,共16页林业研究（英文版）

摘　　要：In this study,we investigated how tree species affect N mineralization in connection to some soil properties and seconder metabolite levels of litter,in the soil of the old-est native forest communities.In the oldest pure communi-ties of Pinus nigra(PN),Fagus orientalis(FO),and Abies bornmuelleriana(AB)in the mountain range of Mount Uludağ,Bursa,Turkey,annual net yield and N mineraliza-tion in the 0-5-and 5-20-cm soil layers were determined in a field incubation study over 1 year.Sampling locations were chosen from 1300 to 1600 m a.s.l.,and moisture content(%),pH,water-holding capacity(%),organic C,total N,and C/N ratio,and annual net mineral N yield of the soil and hydro-lyzed tannic acid and total phenolic compounds in litter were compared for these forest communities.F.orientalis had the highest annual net Nmin yield(43.9±4.8 kg ha^(-1) a^(-1)),P.nigra the lowest(30.5±4.2 kg ha^(-1) a^(-1)).Our findings show that in the oldest forest ecosystems,the seasonal soil moisture content and tree species play an essential role in N cycling and that hydrolyzed tannic acids and total phenolic compounds effectively control N turnover.Tannic acid and total phenolics in the litter were found to inhibit nitrification,but total phenolics were found to stimulate ammonification.

关 键 词：Oldest forest communities Nitrogen mineralization NITRIFICATION Tannic acid Total phenolic LITTER 

分 类 号：S718.5[农业科学—林学]