Partial replacement of inorganic phosphorus (P) by organic manure reshapes phosphate mobilizing bacterial community and promotes P bioavailability in a paddy soil

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Bi , Q-F , Li , K-J , Zheng , B-X , Liu , X-P , Li , H-Z , Jin , B-J , Ding , K , Yang , X-R , Lin , X-Y & Zhu , Y-G 2020 , ' Partial replacement of inorganic phosphorus (P) by organic manure reshapes phosphate mobilizing bacterial community and promotes P bioavailability in a paddy soil ' , The Science of the Total Environment , vol. 703 , 134977 . https://doi.org/10.1016/j.scitotenv.2019.134977

Title: Partial replacement of inorganic phosphorus (P) by organic manure reshapes phosphate mobilizing bacterial community and promotes P bioavailability in a paddy soil
Author: Bi, Qing-Fang; Li, Ke-Jie; Zheng, Bang-Xiao; Liu, Xi-Peng; Li, Hong-Zhe; Jin, Bing-Jie; Ding, Kai; Yang, Xiao-Ru; Lin, Xian-Yong; Zhu, Yong-Guan
Other contributor: University of Helsinki, Ecosystems and Environment Research Programme

Date: 2020-02-10
Language: eng
Number of pages: 11
Belongs to series: The Science of the Total Environment
ISSN: 0048-9697
DOI: https://doi.org/10.1016/j.scitotenv.2019.134977
URI: http://hdl.handle.net/10138/335934
Abstract: The optimization of more sustainable fertilization practice to relieve phosphorus (P) resource scarcity and increase P fertilizer utilization, a better understanding of the regulatory roles of microbes in P mobilization is urgently required to reduce P input. The genes phoD and pqqC are responsible for regulating organic and inorganic P mobilization, respectively. Using high-throughput sequencing, the corresponding bacterial communities harbored by these genes were determined. We conducted a 4-year rice-rice-crop rotation to investigate the responses of phoD- and pqqC-harboring bacterial communities to the partial replacement of inorganic P fertilizer by organic manure with reduced P input. The results showed that a combination of organic and inorganic fertilization maintained high rice yield, and also produced a more complex and stable phosphate mobilizing bacterial community, which contributed to phosphatase activities more than their gene abundances in the model analysis. Compared with conventional mineral fertilization, organic-inorganic fertilization with reduced P input slightly increased pqqC gene abundance while significantly enhancing the abundance of phoD-harboring bacteria, especially the genera Bradyrhizobium and Methylobacterium known as potential organic P mineralizers which can maintain high rice production. Moreover, the increased pH was the most impactful factor for the phoD- and pqqC-harboring bacterial communities, by promoting microbial P turnover and greatly increasing bioavailable P pools (H2O-Pi and NaHCO3-Pi, NaOH-Pi) in P-deficient paddy soil. Hence, our study demonstrated that the partial replacement of mineral P with organic manure could reshape the phosphate mobilizing and alkaline-phosphomonoesterase encoding bacterial communities towards more resilient and effective to the high P utilization and productivity over intense cultivation, providing insights into the potential of soil microbes in the efficient management of agricultural P fertilization.
Subject: 1172 Environmental sciences
4111 Agronomy
Organic-inorganic fertilization
reduced phosphorus input
phosphate mobilizing bacteria
paddy soil
network interactions
Network interactions
FERTILIZATION
Paddy soil
AVAILABILITY
Phosphate mobilizing bacteria
Reduced phosphorus input
GROWTH
NITROGEN
DIVERSITY
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