Straw biochar increases the abundance of inorganic phosphate solubilizing bacterial community for better rape (Brassica napus) growth and phosphate uptake

The direct application of inorganic-phosphate-solubilizing bacteria (iPSBs) for improving the efficiency of phosphorus (P) use leads to a low rate of bacterial survival. Biochar is a good inoculum carrier for microbial survival, and diverse feedstocks can have different effects. We generated an iPSB...

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Bibliographic Details
Published in:The Science of the total environment 2019-01, Vol.647, p.1113-1120
Main Authors: Zheng, Bang-Xiao, Ding, Kai, Yang, Xiao-Ru, Wadaan, Mohammed A.M., Hozzein, Wael N., Peñuelas, Josep, Zhu, Yong-Guan
Format: Article
Language:English
Subjects:
Brassica napus
Brassica napus - physiology
Charcoal - chemistry
Inorganic phosphate solubilizing bacteria
Phosphate uptake
Phosphates - chemistry
Phosphates - metabolism
Phosphorus
Soil
Soil Microbiology
Soil Pollutants - chemistry
Soil Pollutants - metabolism
Straw biochar
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Summary:The direct application of inorganic-phosphate-solubilizing bacteria (iPSBs) for improving the efficiency of phosphorus (P) use leads to a low rate of bacterial survival. Biochar is a good inoculum carrier for microbial survival, and diverse feedstocks can have different effects. We generated an iPSB community using seven selected iPSB strains with various phylogenic taxonomies and P-solubilizing abilities. Biochar was then inoculated with the iPSB community and applied to soil in pots seeded with rape (Brassica napus). Growth of the rape for four weeks and the effects of biochars produced from six raw feedstocks, rice straw, rice husks, soybean straw, peanut shells, corn cobs and wood, were compared. The synthetic iPSB community had a larger capacity to solubilize inorganic P and exude organic anions than any of the individual strains. The structure of the iPSB community was analyzed by high-throughput sequencing four weeks after inoculation. All seven iPSB strains were detected, dominated by Arthrobacter defluvii 06-OD12. The abundance of the iPSB community was significantly correlated with rape biomass, P content and P uptake (P 
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2018.07.454