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- W2393670333 abstract "A field-simulated nitrogen deposition experiment was conducted to investigate the effects of added nitrogen on soil soluble inorganic nitrogen(SIN) and soluble organic nitrogen(SON) in two adjacent natural broad-leaved forests(Cinnamomum chekiangense,CIC and Castanopsis fabric,CAF) and a nearby coniferous plantation(Cunninghamia lanceolata,CUL).Three treatments were set as the control(CK) of 0 kg/(hm2·a),low nitrogen(LN) treatment of 30 kg/(hm2·a) and high nitrogen(HN) treatment of 100 kg/(hm2·a).The results showed that after three days of nitrogen addition,significant effects were only found from the high nitrogen treatment,and there were no significant differences between the effects of CK and LN.After three months of N addition,there were no significant differences among all treatments.Compared with the data after three days of N addition,NH4+-N content in the three forest soils after three months of N addition was significantly increased by 42%-68%(P0.05) under CK,and decreased by 45%-58%(P0.05) under HN.NO3——N content was decreased on average by 24%-88% in the three treatments,with the effects most significant in the HN treatment and in the coniferous forest soil.After three days of N addition,soil SON in the three forest soils increased,with the proportion of SON in total soluble nitrogen(TSN) decreasing with increased N addition level,especially in the coniferous forest soil.However,three months of N addition had little or even the reverse effect on SON.The content of SON was decreased,and the proportion of SON to TSN was increased,after three months of N addition compared with that after three days.This indicated that SON loss was still lower than that of inorganic nitrogen.The content of SON in the broad-leaved forest soils,which was significantly higher than that in coniferous forest soil,which suggests that the chemical characteristics of litters play an important role in SON content variation." @default.
- W2393670333 created "2016-06-24" @default.
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- W2393670333 date "2012-01-01" @default.
- W2393670333 modified "2023-09-26" @default.
- W2393670333 title "Effects of Simulated Nitrogen Deposition on Soluble Nitrogen in Subtropical Forest Soils" @default.
- W2393670333 hasPublicationYear "2012" @default.
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