Bacillus asahii comes to the fore in organic manure fertilized alkaline soils

Youzhi Feng, Ruirui Chen, Junli Hu, Fei Zhao, Junhua Wang, Haiyan Chu, Jiabao Zhang, Jan Dolfing, Xiangui Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Organic manure (OM) fertilization has a profound impact on agroecosystems. However, little is known about temporal responses and roles of the specific soil microbial guilds involved in the increases of soil fertility and crop yield triggered by OM fertilization. To unravel these interactions, a series of fresh and archived soil samples from a fertilization experiment started in 1989 in North China Plain (NCP) was systematically investigated. Molecular assays of contemporary fresh samples unravel that Bacillus asahii responded most distinctly to OM fertilization, while no shifts in microbial community structure were observed between chemical fertilizations and the control without fertilization; a series of archived soil samples from 1989 to 2009 reveal that the indigenous B. asahii took 2-4 years to become specifically dominant and its ratio fluctuated between 40% and 72% during 20 years. Culture-dependent assessments of isolated B. asahii strain further indicate that its rise subsequently played a key role in the increases of both crop yield and soil fertility, especially via accelerating carbon and phosphorus cycling. This insight deepens our understanding of how OM impacts agroecosystems through soil microbial processes, and highlights the possibility of using archived microbial information as a reference to develop an efficient and sustainable agricultural strategy.

Original languageEnglish
Pages (from-to)186-194
Number of pages9
JournalSoil Biology and Biochemistry
Volume81
Early online date2 Dec 2014
DOIs
Publication statusPublished - 1 Feb 2015
Externally publishedYes

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