Effects of inorganic and compost tea fertilizers application on the taxonomic and functional microbial diversity of the purslane rhizosphere

Frontiers in Plant Science

Plant Science

María Romo-Vaquero¹  Margarita Ros²  Angel Carrascosa²  Jose Antonio Pascual²  Maria Del Mar Alguacil²  Ana De Santiago³  Spyridon A. Petropoulos⁴  Álvaro López-García⁵ 

[1] CSIC-Centro de Edafología y Biología Aplicada del Segura, Department of Food Science and Technology, Campus de Espinardo, Murcia, Spain;CSIC-Centro de Edafología y Biología Aplicada del Segura, Department of Soil and Water Conservation, Murcia, Spain;Centro de Investigaciones Científicas y Tecnológicas de Extremadura (CICYTEX), Área de Protección Vegetal, Subárea de gestión y usos de suelos agrícolas y forestales, Instituto de Investigación Finca la Orden, Badajoz, Spain;Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Volos, Greece;Instituto Interuniversitario de investigación del Sistema Tierra en Andalucía, Universidad de Jaén, Jaén, Spain;

关键词: Portulaca oleracea;    crop;    nitrogen application;    Illumina sequencing;    bacterial community;    fungal community;    functional composition;   

DOI  :  10.3389/fpls.2023.1159823

 received in 2023-02-06, accepted in 2023-03-27,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionSoil fertility is a major determinant of plant-microbial interactions, thus, directly and indirectly affecting crop productivity and ecosystem functions. In this study, we analysed for the first time the effects of fertilizer addition on the cropping of purslane (Portulaca oleracea) with particular attention to the taxonomic and functional characteristics of their associated soil microbiota.MethodsWe tested the effects of different doses of inorganic fertilization differing in the amount of N:P:K namely IT1 (300:100:100); IT2 (300:200:100); IT3 (300:200:200); and IT4 (600:100:100) (ppm N:P:K ratio) and organic fertilization (compost tea) which reached at the end of the assay the dose of 300 ppm N.Results and discussionPurslane growth and soil quality parameters and their microbial community structure, abundance of fungal functional groups and prevailing bacterial metabolic functions were monitored. The application of compost tea and inorganic fertilizers significantly increased the purslane shoot biomass, and some soil chemical properties such as pH and soil enzymatic activities related to C, N and P biogeochemical cycles. The bacterial and fungal community compositions were significantly affected by the organic and chemical fertilizers input. The majority of inorganic fertilization treatments decreased the fungal and bacterial diversity as well as some predictive bacterial functional pathways.ConclusionsThese findings suggest that the inorganic fertilization might lead to a change of microbial functioning. However, in order to get stronger evidence that supports the found pattern, longer time-frame experiments that ideally include sampling across different seasons are needed. Thus, further research is still needed to investigate the effects of fertilizations on purslane productivity under commercial field conditions.

【 授权许可】

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Copyright © 2023 Carrascosa, Pascual, López-García, Romo-Vaquero, De Santiago, Ros, Petropoulos and Alguacil