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Legume Species Alter the Effect of Biochar Application on Microbial Diversity and Functions in the Mixed Cropping System-Based on a Pot Experiment

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Title: Legume Species Alter the Effect of Biochar Application on Microbial Diversity and Functions in the Mixed Cropping System-Based on a Pot Experiment
Authors: Kimura, Akari Browse this author
Uchida, Yoshitaka Browse this author →KAKEN DB
Madegwa, Yvonne Musavi Browse this author
Keywords: mixed cropping
legume
microbial diversity
biochar
nitrogen cycling
Issue Date: Oct-2022
Publisher: MDPI
Journal Title: Agriculture
Volume: 12
Issue: 10
Start Page: 1548
Publisher DOI: 10.3390/agriculture12101548
Abstract: Biochar application to legume-based mixed cropping systems may enhance soil microbial diversity and nitrogen (N)-cycling function. This study was conducted to elucidate the effect of biochar application on soil microbial diversity and N-cycling function with a particular focus on legume species. Therefore, we performed a pot experiment consisting of three legume species intercropped with maize: cowpea, velvet bean, and common bean. In addition, one of three fertilizers was applied to each crop: biochar made of chicken manure (CM), a chemical fertilizer, or no fertilizer. Amplicon sequencing for the prokaryotic community and functional prediction with Tax4Fun2 were conducted. Under the CM, Simpson's diversity index was higher in soils with common beans than those in other legume treatments. On the other hand, N-cycling genes for ammonia oxidation and nitrite reductase (NO-forming) were more abundant in velvet bean/maize treatment, and this is possibly due to the increased abundance of Thaumarchaeota (6.7%), Chloroflexi (12%), and Planctomycetes (11%). Cowpea /maize treatment had the lowest prokaryotes abundances among legume treatments. Our results suggest that the choice of legume species is important for soil microbial diversity and N-cycling functions in CM applied mixed cropping systems.
Type: article
URI: http://hdl.handle.net/2115/87280
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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