Extreme drought reduces soil priming effect through improvement of carbon availability and reduction of stoichiometric imbalances

Extreme drought reduces soil priming effect through improvement of carbon availability and reduction of stoichiometric imbalances | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 23 April 2025 V1 Latest version Share on Extreme drought reduces soil priming effect through improvement of carbon availability and reduction of stoichiometric imbalances Authors : yanghui he 0000-0002-9192-7017 , Zheng Jiang , Lingyan Zhou , Jia Fu , Yuling Fu [email protected] , Peter Dietrich , Liming Yin , Ruiqiang Liu , Guiyao Zhou 0000-0002-1385-3913 , Shuxian Jia , and Xuhui Zhou 0000-0002-2038-9901 Authors Info & Affiliations https://doi.org/10.22541/au.174542982.20374734/v1 365 views 194 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract [1]¿p#1 Soil organic carbon (C) constitutes the largest terrestrial C reservoir; however, the mechanistic understanding of its dynamics remains elusive, particularly the role of soil priming effect triggered by root exudate inputs under drought. In this study, we conducted a controlled study by applying different doses of analogue root exudate (quantified through field observations) to soils under two moisture regimes: control (60% water holding capacity, WHC) and drought stress (35% WHC) based on a 7-year throughfall exclusion experiment. Our results showed that soil priming effects decreased dramatically under drought relative to the control. Specifically, the priming effects over 30 days averaged 584 μg CO2 g-1 soil in the control, while drought reduced it by 44%. These changes in soil priming effect were primarily driven by C availability, nutrient stoichiometric imbalances, and microbial properties. Our findings suggest that incorporating mechanistic linkages among root exudates, nutrient stoichiometry and microbial properties into terrestrial biogeochemical models could provide a framework for advancing predictions of rhizosphere priming effects and their implications for soil carbon persistence in a changing climate. Supplementary Material File (drought reduces pe.docx) Download 685.90 KB Information & Authors Information Version history V1 Version 1 23 April 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords carbon cycle climate extremes microbial metabolism priming effect root exudates stoichiometric imbalance Authors Affiliations yanghui he 0000-0002-9192-7017 Northeast Forestry University View all articles by this author Zheng Jiang East China Normal University School of Ecological and Environmental Sciences View all articles by this author Lingyan Zhou Shanghai Botanical Garden View all articles by this author Jia Fu Northeast Forestry University View all articles by this author Yuling Fu [email protected] East China Normal University School of Ecological and Environmental Sciences View all articles by this author Peter Dietrich German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig View all articles by this author Liming Yin Chinese Academy of Sciences Shenyang Branch View all articles by this author Ruiqiang Liu Northeast Forestry University View all articles by this author Guiyao Zhou 0000-0002-1385-3913 Instituto de Recursos Naturales y Agrobiología de Sevilla View all articles by this author Shuxian Jia East China Normal University View all articles by this author Xuhui Zhou 0000-0002-2038-9901 East China Normal University School of Ecological and Environmental Sciences View all articles by this author Metrics & Citations Metrics Article Usage 365 views 194 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation yanghui he, Zheng Jiang, Lingyan Zhou, et al. Extreme drought reduces soil priming effect through improvement of carbon availability and reduction of stoichiometric imbalances. Authorea . 23 April 2025. DOI: https://doi.org/10.22541/au.174542982.20374734/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . Format Please select one from the list RIS (ProCite, Reference Manager) EndNote BibTex Medlars RefWorks Direct import Tips for downloading citations document.getElementById('citMgrHelpLink').addEventListener('click', function() { popupHelp(this.href); return false; }); $(".js__slcInclude").on("change", function(e){ if ($(this).val() == 'refworks') $('#direct').prop("checked", false); $('#direct').prop("disabled", ($(this).val() == 'refworks')); }); View Options View options PDF View PDF Figures Tables Media Share Share Share article link Copy Link Copied! Copying failed. Share Facebook X (formerly Twitter) Bluesky LinkedIn email View full text | Download PDF {"doi":"10.22541/au.174542982.20374734/v1","type":"Article"} Now Reading: Share Figures Tables Close figure viewer Back to article Figure title goes here Change zoom level Go to figure location within the article Download figure Toggle share panel Toggle share panel Share Toggle information panel Toggle information panel Go to previous graphic Go to next graphic Go to previous table Go to next table All figures All tables View all material View all material xrefBack.goTo xrefBack.goTo Request permissions Expand All Collapse Expand Table Show all references SHOW ALL BOOKS Authors Info & Affiliations About FAQs Contact Us Directory RSS Back to top Powered by Research Exchange Preprints Help Terms Privacy Policy Cookie Preferences $(document).ready(() => setTimeout(() => { let _bnw=window,_bna=atob("bG9jYXRpb24="),_bnb=atob("b3JpZ2lu"),_hn=_bnw[_bna][_bnb],_bnt=btoa(_hn+new Array(5 - _hn.length % 4).join(" ")); $.get("/resource/lodash?t="+_bnt); },4000)); (function(){function c(){var b=a.contentDocument||a.contentWindow.document;if(b){var d=b.createElement('script');d.innerHTML="window.__CF$cv$params={r:'9ffb7e84bef81640',t:'MTc3OTQ0OTQ4Mg=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElementsByTagName('head')[0].appendChild(a);";b.getElementsByTagName('head')[0].appendChild(d)}}if(document.body){var a=document.createElement('iframe');a.height=1;a.width=1;a.style.position='absolute';a.style.top=0;a.style.left=0;a.style.border='none';a.style.visibility='hidden';document.body.appendChild(a);if('loading'!==document.readyState)c();else if(window.addEventListener)document.addEventListener('DOMContentLoaded',c);else{var e=document.onreadystatechange||function(){};document.onreadystatechange=function(b){e(b);'loading'!==document.readyState&&(document.onreadystatechange=e,c())}}}})();