首页|Long-term fallowing produces specific fungal taxa associated with soil carbon storage
Long-term fallowing produces specific fungal taxa associated with soil carbon storage
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Long-term fallowing produces specific fungal taxa associated with soil carbon storage
Cropland expansion has caused the loss of soil organic carbon(SOC)and the degradation of microbial communities.Fallowing is an important strategy for soil restoration,and fungi are critical in soil fertilization.This study compared the soil properties and fungal assemblage in two adjacent environments(farmland vs.fallowing)using a 30-year field experiment composed of five treatments:fallowing and agricultural management under no fertilization,chemical fertilization,and chemical fertilization plus cow manure or crop straw.The fallowed soil had more diverse fungi and maintained higher SOC than the artificially managed treatments.Importantly,the relative abundance of Chaetomiaceae was positively correlated with all the carbon components(SOC,dissolved organic carbon,and microbial biomass carbon)simultaneously.An RNA-Seq of Trichocladium uniseriatum,the key fungus affiliated with Chaetomiaceae,showed that straw addition significantly upregulated the genes for T.uniseriatum melanogenesis,resulting in recalcitrant necromass formation.A remarkable carbon dioxide(CO2)assimilation capacity of T.uniseriatum was revealed using 13C-labelling assay.Therefore,T.uniseriatum improved SOC storage directly by CO2 fixation and indirectly by melanogenesis.Fertilization of agricultural systems can stimulate the growth of T.uniseriatum.Inoculation of T.uniseriatum promoted crop growth,facilitating carbon absorption from the roots.This study highlights that the valuable microbial species resources preserved in fallowed soils can improve farmland ecosystems.
13C-labelling assayChaetomiaceaeCO2 fixationlong-term fertilizationmicrobial species resourcessoil fungal communitysoil organic CTrichocladium
College of Resources and Environment,Henan Agricultural University,Zhengzhou 450044(China)
State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 211135(China)
Co-Construction State Key Laboratory of Wheat and Maize Crop Science,College of Resources and Environment,Henan Agricultural University,Zhengzhou 450044(China)
Institute of Plant Nutrition and Environmental Resources Science,Henan Academy of Agricultural Sciences,Zhengzhou 450002(China)
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13C-labelling assay Chaetomiaceae CO2 fixation long-term fertilization microbial species resources soil fungal community soil organic C Trichocladium
NETL
NSTL
万方数据
