acomparisonofdifferentpreservationmethodsfornitrogenisotopesofsoilextractableno3

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	acomparisonofdifferentpreservationmethodsfornitrogenisotopesofsoilextractableno3
	LIU Junchi 1; LIU Weiguo 1; HU Jing 1
	2018
发表期刊	土壤圈英文版
ISSN	1002-0160
卷号	028 期号:006 页码:943
摘要	Nitrogen (N)isotope ratio (δ15N)of soil extractable NO3^- plays a pivotal role in the study of N biogeochemicaI circulation in ecosystems.However,the NO3^- concentration and its isotope composition of soil samples are unstable,making sample storage critical for preserving the N isotope composition of extracted soil NO3^-.Nevertheless,studies on the appropriate selection of storage methods after soil sampling are scarce.In this study,we compared two commonly used methods for storing soil samples and investigated the stability of N isotopes of soil NO3^-.The results demonstrated that no significant changes in the NO3^- concentration and δ15N value occurred in the samples stored at -18℃.However,the soil NO3^- concentration markedly increased,and NO3^-615N value significantly changed after air-drying storage.Meanwhile,we also found that NO3^- and its δ15N were well preserved in the filtered soil extracts after 1month.In contrast,the NO3^-concentration gradually decreased and the 15N in NO3^- was gradually enriched in the bactericidal agent-containing soil mixture solution during the storage period.Overall,our results indicated that N isotopes of NO3^- could be effectively preserved in frozen-stored soil samples or filtered soil extracts.For field investigations conducted in remote areas and continued for a long-time period (and lacking a refrigerant supply),soil extraction/filtration using a CaSO4-saturated solution may be a superior preparation and storage method for analyzing N isotopes of soil NO3^-.
语种	英语
资助项目	[Key Deployment Project from Chinese Academy of Sciences] ; [National Natural Science Foundation of China] ; [National Basic Research Program of China]
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/10759
专题	中国科学院古脊椎动物与古人类研究所
作者单位	1.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences 2.Key Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences 3.中国科学院大学 4.School of Human Settlement and Civil Engineering,Xi'an Jiaotong University
推荐引用方式 GB/T 7714	LIU Junchi,LIU Weiguo,HU Jing. acomparisonofdifferentpreservationmethodsfornitrogenisotopesofsoilextractableno3[J]. 土壤圈英文版,2018,028(006):943.
APA	LIU Junchi,LIU Weiguo,&HU Jing.(2018).acomparisonofdifferentpreservationmethodsfornitrogenisotopesofsoilextractableno3.土壤圈英文版,028(006),943.
MLA	LIU Junchi,et al."acomparisonofdifferentpreservationmethodsfornitrogenisotopesofsoilextractableno3".土壤圈英文版 028.006(2018):943.