Soil gross nitrogen transformations in forestland and cropland of Regosols

Abstract Soil gross nitrogen (N) transformations could be influenced by land use change, however, the differences in inherent N transformations between different land use soils are still not well understood under subtropical conditions. In this study, an 15N tracing experiment was applied to determi...

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Autores principales:	Xiao Ren, Jinbo Zhang, Hamidou Bah, Christoph Müller, Zucong Cai, Bo Zhu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/877ed8a8f9e44beaae583a3259889d8e
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spelling	oai:doaj.org-article:877ed8a8f9e44beaae583a3259889d8e2021-12-02T15:08:27ZSoil gross nitrogen transformations in forestland and cropland of Regosols10.1038/s41598-020-80395-x2045-2322https://doaj.org/article/877ed8a8f9e44beaae583a3259889d8e2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80395-xhttps://doaj.org/toc/2045-2322Abstract Soil gross nitrogen (N) transformations could be influenced by land use change, however, the differences in inherent N transformations between different land use soils are still not well understood under subtropical conditions. In this study, an 15N tracing experiment was applied to determine the influence of land uses on gross N transformations in Regosols, widely distributed soils in Southwest China. Soil samples were taken from the dominant land use types of forestland and cropland. In the cropland soils, the gross autotrophic nitrification rates (mean 14.54 ± 1.66 mg N kg−1 day−1) were significantly higher, while the gross NH4 + immobilization rates (mean 0.34 ± 0.10 mg N kg−1 day−1) were significantly lower than those in the forestland soils (mean 1.99 ± 0.56 and 6.67 ± 0.74 mg N kg−1 day−1, respectively). The gross NO3 − immobilization and dissimilatory NO3 − reduction to NH4 + (DNRA) rates were not significantly different between the forestland and cropland soils. In comparison to the forestland soils (mean 0.51 ± 0.24), the cropland soils had significantly lower NO3 − retention capacities (mean 0.01 ± 0.01), indicating that the potential N losses in the cropland soils were higher. The correlation analysis demonstrated that soil gross autotrophic nitrification rate was negatively and gross NH4 + immobilization rate was positively related to the SOC content and C/N ratio. Therefore, effective measures should be taken to increase soil SOC content and C/N ratio to enhance soil N immobilization ability and NO3 − retention capacity and thus reduce NO3 − losses from the Regosols.Xiao RenJinbo ZhangHamidou BahChristoph MüllerZucong CaiBo ZhuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiao Ren Jinbo Zhang Hamidou Bah Christoph Müller Zucong Cai Bo Zhu Soil gross nitrogen transformations in forestland and cropland of Regosols
description	Abstract Soil gross nitrogen (N) transformations could be influenced by land use change, however, the differences in inherent N transformations between different land use soils are still not well understood under subtropical conditions. In this study, an 15N tracing experiment was applied to determine the influence of land uses on gross N transformations in Regosols, widely distributed soils in Southwest China. Soil samples were taken from the dominant land use types of forestland and cropland. In the cropland soils, the gross autotrophic nitrification rates (mean 14.54 ± 1.66 mg N kg−1 day−1) were significantly higher, while the gross NH4 + immobilization rates (mean 0.34 ± 0.10 mg N kg−1 day−1) were significantly lower than those in the forestland soils (mean 1.99 ± 0.56 and 6.67 ± 0.74 mg N kg−1 day−1, respectively). The gross NO3 − immobilization and dissimilatory NO3 − reduction to NH4 + (DNRA) rates were not significantly different between the forestland and cropland soils. In comparison to the forestland soils (mean 0.51 ± 0.24), the cropland soils had significantly lower NO3 − retention capacities (mean 0.01 ± 0.01), indicating that the potential N losses in the cropland soils were higher. The correlation analysis demonstrated that soil gross autotrophic nitrification rate was negatively and gross NH4 + immobilization rate was positively related to the SOC content and C/N ratio. Therefore, effective measures should be taken to increase soil SOC content and C/N ratio to enhance soil N immobilization ability and NO3 − retention capacity and thus reduce NO3 − losses from the Regosols.
format	article
author	Xiao Ren Jinbo Zhang Hamidou Bah Christoph Müller Zucong Cai Bo Zhu
author_facet	Xiao Ren Jinbo Zhang Hamidou Bah Christoph Müller Zucong Cai Bo Zhu
author_sort	Xiao Ren
title	Soil gross nitrogen transformations in forestland and cropland of Regosols
title_short	Soil gross nitrogen transformations in forestland and cropland of Regosols
title_full	Soil gross nitrogen transformations in forestland and cropland of Regosols
title_fullStr	Soil gross nitrogen transformations in forestland and cropland of Regosols
title_full_unstemmed	Soil gross nitrogen transformations in forestland and cropland of Regosols
title_sort	soil gross nitrogen transformations in forestland and cropland of regosols
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/877ed8a8f9e44beaae583a3259889d8e
work_keys_str_mv	AT xiaoren soilgrossnitrogentransformationsinforestlandandcroplandofregosols AT jinbozhang soilgrossnitrogentransformationsinforestlandandcroplandofregosols AT hamidoubah soilgrossnitrogentransformationsinforestlandandcroplandofregosols AT christophmuller soilgrossnitrogentransformationsinforestlandandcroplandofregosols AT zucongcai soilgrossnitrogentransformationsinforestlandandcroplandofregosols AT bozhu soilgrossnitrogentransformationsinforestlandandcroplandofregosols
_version_	1718388131635396608

Soil gross nitrogen transformations in forestland and cropland of Regosols

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