土壤2023，Vol.60Issue(5)：974-982,9.DOI:10.13758/j.cnki.tr.2023.05.006
亚热带地区土壤硝酸盐异化还原成铵速率的空间差异和驱动因素
Spatial Difference and Driving Factors of Soil Nitrate Dissimilation to Ammoniumin Subtropical Area
摘要
Abstract
The dissimilatory nitrate reduction to ammonium(DNRA)is a vital pathway for soil nitrogen transformation in ecosystems.Clarifying the impact of environmental factors on soil DNRA rates is urgent and significant.In this study,246 experimental observation data were collected to investigate the variation ranges of DNRA rates and their influencing factors in different ecosystems in the subtropical regions using meta-analysis.The results showed that latitude had no significant effect on subtropical soil DNRA rate.The increase in mean annual temperature(MAT),pH,total nitrogen(TN),SOC/NO3--N,Fe(Ⅱ),cation exchange capacity(CEC),easily oxidizable organic carbon(EOC),available phosphorus(AP),and soil clay content promoted DNRA rate.However,the increase of mean annual precipitation(MAP)and soil NH4+ -N content inhibited soil DNRA.In addition,the effects of environmental factors on DNRA rates were complicated in different ecosystems.Structural equation model analysis revealed that SOC/NO3--N was the main driving factor of DNRA,and MAP,MAT,pH,and NH4+ -N also had a significant influence on soil DNRA.关键词
土壤/氮素保留/DNRA速率/气候因素/土壤性质Key words
Soil/Nitrogen retention/DNRA rate/Climatic factor/Soil property分类
农业科技引用本文复制引用
铁文周,黄雪娇,黄金兰,蒋代华..亚热带地区土壤硝酸盐异化还原成铵速率的空间差异和驱动因素[J].土壤,2023,60(5):974-982,9.基金项目
国家自然科学基金项目(42130715,U1901601,42322102)、第二次青藏高原综合科学考察项目(2019QZKK0306-02)资助 Supported by the National Natural Science Foundation of China(Nos.42130715,U1901601 and 42322102)and the Second Tibetan Plateau Scientific Expedition and Research Program(No.2019QZKK0306-02) （42130715,U1901601,42322102）
