Autotrophic and Heterotrophic Nitri?cation in a Highly Acidic Subtropical Pine Forest Soil

作     者：FAEFLEN J.Sarwee LI Shiwei XIN Xiaoping Alan L.WRIGHT JIANG Xianjun 

作者机构：College of Resources and EnvironmentSouthwest UniversityChongqing 400715(China) Everglades Research&Education CenterUniversity of FloridaBelle Glade FL 33430(USA) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2016年第26卷第6期

页      面：904-910页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.41271267) 

主　　题：acidic yellow soil ammonia-oxidizing archaea ammonia-oxidizing bacteria net nitrification rate nitrapyrin nitrification inhibitor 

摘      要：The occurrence of nitri?cation in some acidic forest soils is still a subject of ***?cation of main nitri?cation pathways in acidic forest soils is still largely *** yellow soil(Oxisol) samples were selected to test whether nitri?cation can occur or not in acidic subtropical pine forest *** contributions of autotrophs and heterotrophs to nitri?cation were studied by adding selective nitri?cation inhibitor *** NH^+_4-N concentrations decreased,but NO^-_3-N concentrations increased signi?cantly for the no-nitrapyrin control during the ?rst week of incubation,indicating that nitri?cation did occur in the acidic subtropical *** calculated net nitri?cation rate was 0.49 mg N kg^(-1)d^(-1)for the no-nitrapyrin control during the ?rst week of *** amendment resulted in a signi?cant reduction of NO^-_3-N *** nitri?cation rate averaged0.28 mg N kg^(-1)d^(-1)and the heterotrophic nitri?cation rate was 0.21 mg N kg^(-1)d^(-1)in the ?rst ***-oxidizing bacteria(AOB) abundance increased slightly during incubation,but nitrapyrin amendment signi?cantly decreased AOB amo A gene copy numbers by about 80%.However,the ammonia-oxidizing archaea(AOA) abundance showed signi?cant increases only in the last 2weeks of incubation and it was also decreased by nitrapyrin *** results indicated that nitri?cation did occur in the present acidic subtropical pine forest soil,and autotrophic nitri?cation was the main nitri?cation *** AOA and AOB were the active biotic agents responsible for autotrophic nitri?cation in the acidic subtropical pine forest soil.