Seasonal Change in Microbial Diversity and Its Relationship with Soil Chemical Properties in an Orchard


Autoři: Xuhui Luo aff001;  Ming Kuang Wang aff002;  Guiping Hu aff003;  Boqi Weng aff004
Působiště autorů: Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian Province, China aff001;  Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan aff002;  Jiangxi Sericulture and Tea of Research Institute, Nanchang, Jiangxi Province, China aff003;  Fuzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture and Rural Affairs of People’s Republic China, Fuzhou, Fujian Province, China aff004;  Fujian Key Laboratory on Ecological Processes of Hilly Agriculture in Red Soil Region, Agency of Fujian Science and Technology, Fuzhou, Fujian Province, China aff005
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0215556

Souhrn

This study aimed to determine the microbial diversity at different soil depths (0–5 and 5–20 cm) in a subtropical orchard during different seasons (i.e., spring, summer and autumn) to advance knowledge of the roles of microbes in orchard ecosystem balance. In tracking experiments conducted in an orchard (established in 1996), the phospholipid fatty acid (PLFA) biomarker method was employed to determine the soil microbial system. The total PLFA concentration did not vary significantly between soil depths but changed between seasons. It peaked in the summer at 258.97 ± 23.48 μg g soil-1 from 0–5 cm and at 270.99 ± 58.94 μg g soil-1 from 5–20 cm. A total of 33 microbial fatty acid biomarkers were observed and identified in the sampled soil. The quantities of PLFAs for 29 microbial groups varied significantly between seasons, except for 15:0 iso 3OH, 15:1 iso G, 16:0 2OH, and 17:0 iso 3OH. The bacterial PLFAs and fungal and actinomycetic PLFAs in the orchard soil collected in summer were significantly more abundant than those collected in the spring or autumn (P < 0.01). The number of soil microorganism species (richness) and the Simpson and Shannon-Wiener indexes were all highest in summer. The total PLFAs, bacterial PLFAs, fungal PLFAs, actinomycetic PLFAs, richness, and Simpson and Shannon-Wiener indexes were all significantly negatively correlated with soil pH, total organic carbon (TOC), total nitrogen (TN) and the cation exchange capacity (CEC) (P < 0.05).

Klíčová slova:

Bacteria – Cation exchange capacity – Orchards – Seasons – Shannon index – Simpson index – Soil chemistry – Spring


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