AUTHOR=Li Ying , Shen Qi , An Xiaochi , Xie Yuanhuan , Liu Xiuming , Lian Bin 

TITLE=Organomineral fertilizer application enhances Perilla frutescens nutritional quality and rhizosphere microbial community stability in karst mountain soils

JOURNAL=Frontiers in Microbiology

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2022.1058067

DOI=10.3389/fmicb.2022.1058067

ISSN=1664-302X

ABSTRACT=<sec><title>Introduction</title><p>Applications of organomineral fertilizer (OMF) are important measures for developing organic agriculture in karst mountain areas. However, the influence of OMF on the structure and function of soil microbial diversity and their relationship with crop yield and quality are still unclear.</p></sec><sec><title>Methods</title><p>Based on soil science, crop science, and high-throughput sequencing methods, we investigated the changes of rhizosphere soil microbial communities of <italic>Perilla frutescens</italic> under different fertilization measures. Then, the relationship between <italic>P. frutescens</italic> yield and quality with soil quality was analyzed.</p></sec><sec><title>Results</title><p>The results showed that the addition of OMF increased the amount of total carbon and total potassium in soil. OF, especially OMF, improved <italic>P. frutescens</italic> yield and quality (e.g., panicle number per plant, main panicle length, and unsaturated fatty acid contents). Both OF and OMF treatments significantly increased the enrichment of beneficial microorganism (e.g., <italic>Bacillus</italic>, <italic>Actinomadura</italic>, <italic>Candidatus_Solibacter</italic>, <italic>Iamia</italic>, <italic>Pseudallescheria</italic>, and <italic>Cladorrhinum</italic>). The symbiotic network analysis demonstrated that OMF strengthened the connection among the soil microbial communities, and the community composition became more stable. Redundancy analysis and structural equation modeling showed that the soil pH, available phosphorus, and available potassium were significantly correlated with soil microbial community diversity and <italic>P. frutescens</italic> yield and quality.</p></sec><sec><title>Discussion</title><p>Our study confirmed that OMF could replace <italic>CF</italic> or common OF to improve soil fertility, crop yield and quality in karst mountain soils.</p></sec>