{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T18:20:09Z","timestamp":1787941209029,"version":"build-2784847793"},"reference-count":58,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"35","funder":[{"name":"National Key Research and Development Program of China","award":["2021YFD1500500"],"award-info":[{"award-number":["2021YFD1500500"]}]},{"name":"The Earmarked Fund for China Agriculture Research System","award":["CARS-02-16"],"award-info":[{"award-number":["CARS-02-16"]}]},{"name":"the 2115 Talent Development Program of China Agricultural University"},{"name":"the Graduate Student Innovation Research Fund Project of China Agricultural University"},{"name":"the Graduate Student Innovation Research Fund Project of China Agricultural University"}],"content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Sci. Adv."],"published-print":{"date-parts":[[2026,8,28]]},"abstract":"<jats:p>\n                    Nitrous oxide (N\n                    <jats:sub>2<\/jats:sub>\n                    O), a potent greenhouse gas and the dominant ozone-depleting substance, is primarily emitted from soils. Understanding atmosphere-to-soil N\n                    <jats:sub>2<\/jats:sub>\n                    O uptake is crucial for harnessing the soil\u2019s natural sink potential, yet its quantification and mechanistic drivers remain poorly constrained. Here, we disentangled gross N\n                    <jats:sub>2<\/jats:sub>\n                    O emission and uptake using the\n                    <jats:sup>15<\/jats:sup>\n                    N\n                    <jats:sub>2<\/jats:sub>\n                    O pool dilution method, revealing key drivers in five cropland soils across China and in labile carbon\u2013amended soils. In particular, the ratio of gross N\n                    <jats:sub>2<\/jats:sub>\n                    O uptake to emission\u2014driven by the soil labile carbon to inorganic nitrogen [dissolved organic carbon\/dissolved inorganic nitrogen (DOC\/DIN)] ratio\u2014showed pronounced variability (0.28 to 0.79), revealing a powerful but previously underestimated lever for regulating net N\n                    <jats:sub>2<\/jats:sub>\n                    O fluxes. Mechanistically, an elevated DOC\/DIN ratio promoted complete denitrification by increasing electron supply, stimulating oxygen-depleting respiration, and enhancing\n                    <jats:italic toggle=\"yes\">nosZ<\/jats:italic>\n                    gene abundance, achieving up to 51% N\n                    <jats:sub>2<\/jats:sub>\n                    O mitigation. Our findings underscore soils as dynamic N\n                    <jats:sub>2<\/jats:sub>\n                    O regulators and propose a carbon-nitrogen\u2013coupled regulation framework, where labile carbon plays a critical role in regulating N\n                    <jats:sub>2<\/jats:sub>\n                    O dynamics.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aef6792","type":"journal-article","created":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T17:58:31Z","timestamp":1787939911000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["Unlocking soil nitrous oxide sink through labile carbon"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6639-5717","authenticated-orcid":true,"given":"Yiping","family":"Xu","sequence":"first","affiliation":[{"name":"College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0901-628X","authenticated-orcid":true,"given":"Deqiang","family":"Zhao","sequence":"additional","affiliation":[{"name":"College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2008-143X","authenticated-orcid":true,"given":"Huadong","family":"Zang","sequence":"additional","affiliation":[{"name":"College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6639-1273","authenticated-orcid":true,"given":"J\u00f8rgen E.","family":"Olesen","sequence":"additional","affiliation":[{"name":"Department of Agroecology, Aarhus University, Blichers All\u00e9 20, 8830 Tjele, Denmark."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4556-0218","authenticated-orcid":true,"given":"Yiqi","family":"Luo","sequence":"additional","affiliation":[{"name":"Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3784-1124","authenticated-orcid":true,"given":"Pete","family":"Smith","sequence":"additional","affiliation":[{"name":"Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St. Machar Drive, AB24 3UU Aberdeen, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4913-0645","authenticated-orcid":true,"given":"Shunli","family":"Zhou","sequence":"additional","affiliation":[{"name":"College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, 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