
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 20, 2024
ABSTRACT Increasing droughts threaten soil microbial communities and the multiple functions they control in agricultural soils. These soils are often fertilized with mineral nutrients, but it remains unclear how this fertilization may alter capacity of multifunctionality (SMF) to be maintained under drought, plant-soil interactions shape these effects. In study, we used a mountain grassland test interactive effect nutrient (Nitrogen Phosphorous) addition drought on SMF without plants ( Lolium perenne ) mesocosm experiment. We calculated based 8 properties associated microbes store carbon (C), nitrogen (N) phosphorous (P) their biomass, process elements through organic matter depolymerization, mineralization, nitrification denitrification processes. To investigate mechanisms underlying response characterized changes stoichiometry community composition using 16S 18S rRNA amplicon sequencing. Our results showed that decreased resistance when were present, opposite was observed unplanted soil. analysis suggested due interaction plants, influencing four coupled related high SMF: moisture, low C limitation, bacterial diversity bacteria gram positive:gram negative ratio. Altogether, our reducing use fertilizer for plant production could improve ability maintain during period. Finally, study clearly further demonstrated importance complex responses global combining stoichiometric assessment represents powerful approach disentangle mechanisms.
Language: Английский