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Soil nitrogen and phosphorus regulate decomposition of organic nitrogen compounds in the rothamsted experiment

文献类型： 外文期刊

作者： Tang, Sheng 1 ; Pan, Wankun 1 ; Zhou, Jingjie 4 ; Ma, Qingxu 1 ; Yang, Xiangde 5 ; Wanek, Wolfgang 6 ; Marsden, Karina A. 3 ; Kuzyakov, Yakov 7 ; Chadwick, David R. 3 ; Wu, Lianghuan 1 ; Gregory, Andrew S. 10 ; Jones, Davey L. 3 ;

作者机构： 1.Zhejiang Univ, Coll Environm & Resource Sci, Key Lab Environm Remediat & Ecosyst Hlth, Minist Educ, Hangzhou 310058, Peoples R China

2.Zhejiang Univ, Coll Environm & Resource Sci, Zhejiang Prov Key Lab Agr Resources & Environm, Hangzhou 310058, Peoples R China

3.Bangor Univ, Sch Environm & Nat Sci, Gwynedd LL57 2UW, Wales

4.China Natl Rice Res Inst, Innovat Ctr Saline alkali Land Comprehens Utilizat, Hangzhou 310006, Peoples R China

5.Tea Res Inst, Key Lab Tea Qual & Safety Control, Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Hangzhou 310008, Peoples R China

6.Univ Vienna, Ctr Microbiol & Environm Syst Sci, Dept Microbiol & Ecosyst Sci, Div Terr Ecosyst Res, Djerassi Pl 1, A-1030 Vienna, Austria

7.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, D-37077 Gottingen, Germany

8.RUDN Univ, Peoples Friendship Univ Russia, Moscow 117198, Russia

9.Kazan Fed Univ, Inst Environm Sci, Kazan 420049, Russia

10.Protecting Crops & Environm, Rothamsted Res, Harpenden AL5 2JQ, Herts, England

11.Murdoch Univ, Food Futures Inst, Ctr Sustainable Farming Syst, SoilsWest, Murdoch, WA 6150, Australia

关键词： Long-term experiment; Nitrogen fertilisation; Phosphorus fertilisation; Soil organic nitrogen decomposition; Isotope labelling

期刊名称：SOIL BIOLOGY & BIOCHEMISTRY （ 影响因子：10.3； 五年影响因子：11.5 ）

ISSN： 0038-0717

年卷期： 2024 年 196 卷

页码：

收录情况： SCI

摘要： The effects of long-term N and P fertilisation on soil organic nitrogen (SON) turnover are unclear. We sampled soils fertilised by N and/or P since 1843 at Rothamsted Research to investigate the effects of long-term N and P fertilisation on high- or low-molecular-weight SON decomposition and gross N mineralisation. Short-term assays with added 14C-labelled proteins, peptides, and amino acids and gross organic N mineralisation were measured, and the microbial communities and functions were also assessed in parallel. Long-term N fertilisation increased the contents of soil extractable organic N and peptides but decreased organic N-hydrolysing enzyme activities (Nacetyl-beta-D-glucosaminidase and leucine aminopeptidase). Fertilisation with P and N accelerated and reduced the decomposition of C-14-labelled organic N compounds, respectively. The decomposition of peptides and amino acids, as labile SON components, was mainly regulated by soil P content because microbial biomass and activity were more sensitive to P fertilisation than to N fertilisation. Gross NH4+(NO3-)-N-/ production and consumption were accelerated by 41%-60% under N fertilisation but remained unchanged under P fertilisation compared to the unfertilised treatment. Metagenomic sequencing showed that N fertilisation increased microbial diversity and enriched functional genes associated with organic N decomposition, compared to the unfertilised treatment. P fertilisation had no effect on the abundance of these functional genes. In agricultural practices, it is essential to comprehensively consider the interaction between N and P fertilisation to optimise the cycling and utilisation of SON.

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