Nitrogen addition mediates the effect of soil microbial diversity on microbial carbon use efficiency under long‐term tillage practices

Bibliographic Data

ID21648145
AuthorsMengni Zhang (0000-0001-7437-5209, Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing PR China), Shengping Li (0000-0001-5075-9574, Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing PR China, corresponding author), Xueping Wu (0000-0002-9563-3796, Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing PR China, corresponding author), Fengjun Zheng (Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing PR China), Xiaojun Song (0000-0002-7971-9696, Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing PR China), Jinjing Lu (Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing PR China), Xiaotong Liu (0000-0003-1141-9184, Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing PR China), Bisheng Wang (College of Agronomy, Qingdao Agricultural University Qingdao PR China), Ahmed Ali Abdelrhmana (0000-0002-7243-7338, Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing PR China), Aurore Degré (0000-0001-6912-6136, Terra Research Center University of Liege, GxABT Gembloux Belgium)
Year2022
Volume33
Issue13
Pages2258-2275
Publication date2022-08-15
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.4279
OpenAlexW4226365338
LanguageEN
References cited97

Tillage practices can influence soil microbial carbon use efficiency (CUE), which is critical for carbon cycling in terrestrial ecosystems. The effect of tillage practices could also be regulated by nitrogen (N) addition. However, the soil microbial mechanism relating to N fertilizer effect on microbial CUE under no‐tillage (zero‐tillage) is still unclear. We investigated how N fertilizer regulates the effect of tillage management on microbial CUE through changing microbial properties and further assessed the impact of microbial CUE on particulate (POC) and mineral‐associated organic matter carbon (MAOC). For this we used a 16‐year field experiment with no‐tillage (NT) and conventional tillage (CT), both of which combined with 105 (N1), 180 (N2), and 210 kg N ha −1 (N3) N application. We found that microbial CUE increased with increasing N application rate. NT increased microbial CUE compared with CT in the 0–10 cm. The bacterial and fungal diversities of NT were higher than CT and N application decreased their diversities in 0–10 cm. The partial least squares path model showed that bacterial and fungal diversity had a significant influence on microbial CUE. Furthermore, POC and MAOC under NT were higher than CT and they also increased with increasing N application rate. It suggested that increasing microbial CUE induced by N application had the potential to increase POC and MAOC. Overall, this study highlights that N addition can alter the effect of soil microbial diversity on CUE, which further improves our understanding to explain and predict the fractions of SOC (i.e., POC and MAOC) in tillage systems

Agronomy · Algorithm · Bacteria · Biology · Carbon fibers · Conventional tillage · Ecosystem · Fertilizer · Field experiment · Microbial population biology · Soil carbon · Soil water · Tillage · Chemistry · Environmental Science · Mathematics · Peatlands and Wetlands Ecology · Soil and Water Nutrient Dynamics · Soil Carbon and Nitrogen Dynamics · Ecology · Soil Science

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