土壤可溶性有机氮测定方法研究进展  

Advances in Determination of Soil Dissolved Organic Nitrogen

作　　者：储成 程谊 曹亚澄[2] 蔡祖聪[1,3,4,5] 张金波 CHU Cheng;CHENG Yi;CAO Yacheng;CAI Zucong;ZHANG Jinbo(School of Geography Sciences,Nanjing Normal University,Nanjing 210023,China;State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;State Key Laboratory Cultivation Base of Geographical Environment Evolution(Jiangsu Province),Nanjing 210023,China;Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing 210023,China;Key Laboratory of Virtual Geographic Environment(Nanjing Normal University),Ministry of Education,Nanjing 210023,China)

机构地区：[1]南京师范大学地理科学学院,南京210023 [2]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008 [3]江苏省地理环境演化国家重点实验室培育建设点,南京210023 [4]江苏省地理信息资源开发与利用协同创新中心,南京210023 [5]南京师范大学虚拟地理环境教育部重点实验室,南京210023

出　　处：《土壤》2021年第3期469-477,共9页Soils

基　　金：国家自然科学基金项目(41830642)资助。

摘　　要：可溶性有机氮(DON)是土壤中生物可利用有机氮库的主要成分,是最为活跃的有机氮形态之一。DON在土壤中的迁移和转化是土壤氮素地球生物化学循环的重要一环,与氮素养分供应、损失等过程密切相关。然而缺失准确、可靠的土壤DON分析方法严重限制了DON的相关研究进程。本文综述了近年来国内外土壤浸提液和水体中DON测定方法,重点比较了不同可溶性总氮(DTN)测定方法以及不同前处理方法对提高DON测定结果准确性的影响。Dissolved organic nitrogen(DON), as the main component of the bioavailable organic nitrogen pool in the soil, is one of the most active forms of organic nitrogen. As an important part of the soil nitrogen biochemical cycle, the migration and transformation of DON in the soil is closely related to the processes of nitrogen supply and loss. However, researches on soil DON were strongly limited by the lack of accurate and reliable analysis methods. This article summarized DON determination methods in soil extracts and waters in recent years, and focused on comparing the effects of different total soluble nitrogen(DTN) measurement methods and different pretreatment methods on improving the accuracy of DON analysis.

关 键 词：可溶性有机氮 可溶性总氮 前处理方法 无机氮去除 差减法 

分 类 号：S151.9[农业科学—土壤学] S132[农业科学—农业基础科学]