Nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China

Abstract Fertilizer-induced changes in soil nutrients regulate nitrogen (N) fixation in the terrestrial biosphere, but the influences of N and phosphorus (P) fertilization on the diazotroph communities in successive crop seasons were unclear. In this study, we assessed the effects of N and P (high v...

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Autores principales:	Jing Zhou, Mingchao Ma, Dawei Guan, Xin Jiang, Nianxin Zhang, Fengyue Shu, Yong Kong, Jun Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fef09ace9574412f9577a147591a74b0
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spelling	oai:doaj.org-article:fef09ace9574412f9577a147591a74b02021-12-02T17:05:45ZNitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China10.1038/s41598-021-85829-82045-2322https://doaj.org/article/fef09ace9574412f9577a147591a74b02021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85829-8https://doaj.org/toc/2045-2322Abstract Fertilizer-induced changes in soil nutrients regulate nitrogen (N) fixation in the terrestrial biosphere, but the influences of N and phosphorus (P) fertilization on the diazotroph communities in successive crop seasons were unclear. In this study, we assessed the effects of N and P (high vs. low doses) on the abundance and structure of N2-fixation communities after wheat and soybean harvest in a long-term (34 and 35 years) fertilization experiment. In both seasons, long-term N addition significantly decreased the abundance of nifH genes and 16S rDNA; in addition, high doses of N and P fertilizer decreased the richness of diazotrophs, whereas low doses did not. The proportion of the dominant genus, Bradyrhizobium, in the soybean season (86.0%) was higher than that in the wheat season (47.9%). Fertilization decreased diazotroph diversity and the relative abundance of Bradyrhizobium in the wheat season, but had insignificant effects in the soybean season. The addition of N, but not P, significantly changed the communities of both diazotrophs (at the genus level) and rhizobia (at the species level) in the two seasons. Soil pH was positively associated with nifH abundance and diazotrophic richness; soil NO3 − content was negatively correlated with diazotrophic richness and positively correlated with diversity. Soil pH and NO3 − content were the two main drivers shaping the soil diazotrophic community. Overall, long-term inorganic N had a greater influence than P on both diazotrophic abundance and community composition, and diazotrophic diversity was more clearly affected by fertilization in the wheat season than in the soybean season.Jing ZhouMingchao MaDawei GuanXin JiangNianxin ZhangFengyue ShuYong KongJun LiNature 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 Jing Zhou Mingchao Ma Dawei Guan Xin Jiang Nianxin Zhang Fengyue Shu Yong Kong Jun Li Nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China
description	Abstract Fertilizer-induced changes in soil nutrients regulate nitrogen (N) fixation in the terrestrial biosphere, but the influences of N and phosphorus (P) fertilization on the diazotroph communities in successive crop seasons were unclear. In this study, we assessed the effects of N and P (high vs. low doses) on the abundance and structure of N2-fixation communities after wheat and soybean harvest in a long-term (34 and 35 years) fertilization experiment. In both seasons, long-term N addition significantly decreased the abundance of nifH genes and 16S rDNA; in addition, high doses of N and P fertilizer decreased the richness of diazotrophs, whereas low doses did not. The proportion of the dominant genus, Bradyrhizobium, in the soybean season (86.0%) was higher than that in the wheat season (47.9%). Fertilization decreased diazotroph diversity and the relative abundance of Bradyrhizobium in the wheat season, but had insignificant effects in the soybean season. The addition of N, but not P, significantly changed the communities of both diazotrophs (at the genus level) and rhizobia (at the species level) in the two seasons. Soil pH was positively associated with nifH abundance and diazotrophic richness; soil NO3 − content was negatively correlated with diazotrophic richness and positively correlated with diversity. Soil pH and NO3 − content were the two main drivers shaping the soil diazotrophic community. Overall, long-term inorganic N had a greater influence than P on both diazotrophic abundance and community composition, and diazotrophic diversity was more clearly affected by fertilization in the wheat season than in the soybean season.
format	article
author	Jing Zhou Mingchao Ma Dawei Guan Xin Jiang Nianxin Zhang Fengyue Shu Yong Kong Jun Li
author_facet	Jing Zhou Mingchao Ma Dawei Guan Xin Jiang Nianxin Zhang Fengyue Shu Yong Kong Jun Li
author_sort	Jing Zhou
title	Nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China
title_short	Nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China
title_full	Nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China
title_fullStr	Nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China
title_full_unstemmed	Nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China
title_sort	nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in northeast china
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fef09ace9574412f9577a147591a74b0
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Nitrogen has a greater influence than phosphorus on the diazotrophic community in two successive crop seasons in Northeast China

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