Biological and synthetic approaches to inhibiting nitrification in non-tilled Mediterranean soils

Bozal-Leorri, Adrián; Corrochano Monsalve, Mario; Arregui Odériz, Luis Miguel; Aparicio Tejo, Pedro María; González Murua, Carmen

Biological and synthetic approaches to inhibiting nitrification in non-tilled Mediterranean soils

dc.contributor.author	Bozal-Leorri, Adrián
dc.contributor.author	Corrochano Monsalve, Mario
dc.contributor.author	Arregui Odériz, Luis Miguel
dc.contributor.author	Aparicio Tejo, Pedro María
dc.contributor.author	González Murua, Carmen
dc.contributor.department	Agronomía, Biotecnología y Alimentación	es_ES
dc.contributor.department	Agronomia, Bioteknologia eta Elikadura	eu
dc.contributor.department	Ciencias	es_ES
dc.contributor.department	Zientziak	eu
dc.date.accessioned	2022-04-07T07:47:44Z
dc.date.available	2022-04-07T07:47:44Z
dc.date.issued	2021
dc.description.abstract	Background: The increasing demand for food production has led to a tenfold increase in nitrogen (N) fertilizer use since the Green Revolution. Nowadays, agricultural soils have been turned into high-nitrifying environments that increase N pollution. To decrease N losses, synthetic nitrification inhibitors (SNIs) such as 3,4-dimethylpyrazole phosphate (DMPP) have been developed. However, SNIs are not widely adopted by farmers due to their biologically limited stability and soil mobility. On the other hand, allelopathic substances from root exudates from crops such as sorghum are known for their activity as biological nitrification inhibitors (BNIs). These substances are released directly into the rhizosphere. Nevertheless, BNI exudation could be modified or even suppressed if crop development is affected. In this work, we compare the performance of biological (sorghum crop) and synthetic (DMPP) nitrification inhibitors in field conditions. Results: Sorghum crop BNIs and DMPP prevented an increase in the abundance of ammonia-oxidizing bacteria (AOB) without affecting the total bacterial abundance. Both nitrification inhibitors maintained similar soil NH4+ content, but at 30 days post-fertilization (DPF), the sorghum BNIs resulted in higher soil NO3− content than DMPP. Even so, these inhibitors managed to reduce 64% and 96%, respectively, of the NO3−-N/NH4+-N ratio compared to the control treatment. Similar to soil mineral N, there were no differences in leaf δ15N values between the two nitrification inhibitors, yet at 30 DPF, δ15N values from sorghum BNI were more positive than those of DMPP. N2O emissions from DMPP-treated soil were low throughout the experiment. Nevertheless, while sorghum BNIs also maintained low N2O emissions, they were associated with a substantial N2O emission peak at 3 DPF that lasted until 7 DPF. Conclusions: Our results indicate that while sorghum root exudates can reduce nitrification in field soil, even at the same efficiency as DMPP for a certain amount of time, they are not able to prevent the N pollution derived from N fertilization as DMPP does during the entire experiment.	en
dc.description.sponsorship	This project was funded by the Spanish Government (RTI2018-094623-B-C22 MCIU/AEI/FEDER, UE) and by the Basque Government (IT-932-16). Adrián Bozal-Leorri holds a Grant from the Basque Government (PRE-2020-2-0142). Mario Corrochano-Monsalve holds a Grant from the Ministry of Economy and Business of the Spanish Government (BES-2016-076725).	en
dc.format.extent	12 p.
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/zip	en
dc.identifier.doi	10.1186/s40538-021-00250-7
dc.identifier.issn	2196-5641
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/42675
dc.language.iso	eng	en
dc.publisher	SpringerOpen	en
dc.relation.ispartof	Chemical and Biological Technologies in Agriculture, (2021) 8:51	en
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-094623-B-C22/ES/
dc.relation.publisherversion	https://doi.org/10.1186/s40538-021-00250-7
dc.rights	© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.	es_ES
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/
dc.subject	AmoA gene	en
dc.subject	DMPP	en
dc.subject	Nitrous oxide emissions	en
dc.subject	No-till farming	en
dc.subject	Soil mineral nitrogen	en
dc.subject	Sorghum	en
dc.subject	δ15N	en
dc.title	Biological and synthetic approaches to inhibiting nitrification in non-tilled Mediterranean soils	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
dspace.entity.type	Publication
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