Mineral nitrogen captured in field-aged biochar is plant-available

Abstract Biochar may serve as a tool to sustainably mitigate climate change via carbon sequestration and by improving soil fertility. Biochar has shown to retain nitrate in its pores, which increases with an organic coating of the inner surfaces and residence time in soil (“aging”). Here we investig...

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Autores principales:	Ghulam Haider, Stephen Joseph, Diedrich Steffens, Christoph Müller, Sarasadat Taherymoosavi, David Mitchell, Claudia I. Kammann
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e5fc278eff094d59a74652ce5c8d9fc5
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spelling	oai:doaj.org-article:e5fc278eff094d59a74652ce5c8d9fc52021-12-02T18:50:59ZMineral nitrogen captured in field-aged biochar is plant-available10.1038/s41598-020-70586-x2045-2322https://doaj.org/article/e5fc278eff094d59a74652ce5c8d9fc52020-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-70586-xhttps://doaj.org/toc/2045-2322Abstract Biochar may serve as a tool to sustainably mitigate climate change via carbon sequestration and by improving soil fertility. Biochar has shown to retain nitrate in its pores, which increases with an organic coating of the inner surfaces and residence time in soil (“aging”). Here we investigated the plant accessibility of the captured nitrate in field-aged biochar, as a pre-requisite for developing carbon-based N fertilization techniques with environmental benefits. Based on previous results, we hypothesized that part of the biochar-captured nitrate would remain unavailable for plants. A two-factorial greenhouse experiment was designed, where the N was applied either as Ca(NO3)2 or as N captured in field-aged biochar at five increasing N doses to quinoa and perennial ryegrass in pots. Interestingly, the biochar-captured N was as plant available as the mineral nitrate, except for the highest dosage. Refuting our hypothesis, no significant amounts of N were extractable at the end of the study from the biochar–soil mixtures with repeated-extraction protocols. Thus, N captured by biochar may improve the N use efficiency in agriculture. Further research should evaluate the role of biochar particle size, root morphology, mycorrhization, and soil moisture (variations) for nitrate retrieval from biochar particles by plants because the captured biochar N was less available in the field as under present controlled conditions.Ghulam HaiderStephen JosephDiedrich SteffensChristoph MüllerSarasadat TaherymoosaviDavid MitchellClaudia I. KammannNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-12 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ghulam Haider Stephen Joseph Diedrich Steffens Christoph Müller Sarasadat Taherymoosavi David Mitchell Claudia I. Kammann Mineral nitrogen captured in field-aged biochar is plant-available
description	Abstract Biochar may serve as a tool to sustainably mitigate climate change via carbon sequestration and by improving soil fertility. Biochar has shown to retain nitrate in its pores, which increases with an organic coating of the inner surfaces and residence time in soil (“aging”). Here we investigated the plant accessibility of the captured nitrate in field-aged biochar, as a pre-requisite for developing carbon-based N fertilization techniques with environmental benefits. Based on previous results, we hypothesized that part of the biochar-captured nitrate would remain unavailable for plants. A two-factorial greenhouse experiment was designed, where the N was applied either as Ca(NO3)2 or as N captured in field-aged biochar at five increasing N doses to quinoa and perennial ryegrass in pots. Interestingly, the biochar-captured N was as plant available as the mineral nitrate, except for the highest dosage. Refuting our hypothesis, no significant amounts of N were extractable at the end of the study from the biochar–soil mixtures with repeated-extraction protocols. Thus, N captured by biochar may improve the N use efficiency in agriculture. Further research should evaluate the role of biochar particle size, root morphology, mycorrhization, and soil moisture (variations) for nitrate retrieval from biochar particles by plants because the captured biochar N was less available in the field as under present controlled conditions.
format	article
author	Ghulam Haider Stephen Joseph Diedrich Steffens Christoph Müller Sarasadat Taherymoosavi David Mitchell Claudia I. Kammann
author_facet	Ghulam Haider Stephen Joseph Diedrich Steffens Christoph Müller Sarasadat Taherymoosavi David Mitchell Claudia I. Kammann
author_sort	Ghulam Haider
title	Mineral nitrogen captured in field-aged biochar is plant-available
title_short	Mineral nitrogen captured in field-aged biochar is plant-available
title_full	Mineral nitrogen captured in field-aged biochar is plant-available
title_fullStr	Mineral nitrogen captured in field-aged biochar is plant-available
title_full_unstemmed	Mineral nitrogen captured in field-aged biochar is plant-available
title_sort	mineral nitrogen captured in field-aged biochar is plant-available
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/e5fc278eff094d59a74652ce5c8d9fc5
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Mineral nitrogen captured in field-aged biochar is plant-available

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