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Legume crop rotation suppressed nitrifying microbial community in a sugarcane cropping soil

Paungfoo-Lonhienne, Chanyarat and Wang, Weijin and Yeoh, Yun Kit and Halpin, Neil (2017) Legume crop rotation suppressed nitrifying microbial community in a sugarcane cropping soil. Scientific Reports, 7 (1). p. 16707. ISSN 2045-2322

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Article Link(s): https://doi.org/10.1038/s41598-017-17080-z

Abstract

Nitrifying microorganisms play an important role in nitrogen (N) cycling in agricultural soils as nitrification leads to accumulation of nitrate (NO3 −) that is readily lost through leaching and denitrification, particularly in high rainfall regions. Legume crop rotation in sugarcane farming systems can suppress soil pathogens and improve soil health, but its effects on soil nitrifying microorganisms are not well understood. Using shotgun metagenomic sequencing, we investigated the impact of two legume break crops, peanut (Arachis hypogaea) and soybean (Glycine max), on the nitrifying communities in a sugarcane cropping soil. Cropping with either legume substantially increased abundances of soil bacteria and archaea and altered the microbial community composition, but did not significantly alter species richness and evenness relative to a bare fallow treatment. The ammonia oxidisers were mostly archaeal rather than bacterial, and were 24–44% less abundant in the legume cropping soils compared to the bare fallow. Furthermore, abundances of the archaeal amoA gene encoding ammonia monooxygenase in the soybean and peanut cropping soils were only 30–35% of that in the bare fallow. These results warrant further investigation into the mechanisms driving responses of ammonia oxidising communities and their nitrification capacity in soil during legume cropping.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Microbial ecology Soil microbiology
Subjects:Agriculture > Agriculture (General) > Agricultural ecology (General)
Agriculture > Agriculture (General) > Soils. Soil science > Soil chemistry
Agriculture > Agriculture (General) > Soils. Soil science > Soil and crops. Soil-plant relationships. Soil productivity
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Agriculture > Agriculture (General) > Agricultural conservation
Agriculture > Agriculture (General) > Soil conservation and protection
Plant culture > Field crops > Sugar plants
Deposited On:08 Dec 2017 00:00
Last Modified:08 Dec 2017 00:00

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