首页|Vertical and horizontal shifts in the microbial community structure of paddy soil under long-term fertilization regimes

Vertical and horizontal shifts in the microbial community structure of paddy soil under long-term fertilization regimes

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  • NSTL
  • Elsevier
Knowledge remains limited on how the structure of microbial community in paddy soils changes in relation to different types of fertilizers with same amount of nutrients. Thus, here, soil samples were collected at 0-10, 10-20, 20-30, and 30-40 cm depths from a paddy field subjected to four long-term fertilization treatments (no fertilization, mineral fertilization, mineral fertilization combined with rice straw, and chicken manure) and analyzed for microbial biomass and community composition. In unfertilized soils, microbial biomass decreased from 0 to 40 cm (with actinomycetes < gram-positive (G+) bacteria < gram-negative (G-) bacteria < fungi). This ordering was retained after fertilization, but the decline with depth was less pronounced. Both mineral and mineral plus organic fertilization increased the biomass of G+ bacteria compared to G- bacteria (22.7-56.2% increase) and actinomycetes (14.8-52.5% increase). Thus, over the long term, G+ bacteria benefited the most from mineral fertilizer than the other microbial groups. The partial replacement of mineral fertilizer with manure primarily enhanced the abundance of G+ bacteria at 0-30 cm soil depth, whereas replacement with straw enhanced the abundance of fungi at 10-20 cm soil depth. Our findings demonstrate that the structure of the microbial community is strongly impacted by long-term fertilization, independent of fertilizer type.

Mineral fertilizerMicrobial community compositionStraw additionSoil depthOrganic manurePaddy soil

Zhu, Zhenke、Shahbaz, Muhammad、Wei, Xiaomeng、Pausch, Johanna、Wu, Jinshui、Ge, Tida、Liu, Qiong、Atere, Cornelius Talade

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Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

Lund Univ, Ctr Environm & Climate Sci, S-22362 Lund, Sweden

Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Processes Subtrop Region & Chang, Nanjing 410125, Hunan, Peoples R China

Univ Bayreuth, BayCEER, Dept Agroecol, D-95447 Bayreuth, Germany

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2022

10.1016/j.apsoil.2021.104248

Applied Soil Ecology

Applied Soil Ecology

SCI
ISSN：0929-1393
年,卷(期)：2022.169
  • 5
  • 42