Biochar enhances Aspergillus niger rock phosphate solubilization by increasing organic acid production and alleviating fluoride toxicity.
作者： Gilberto de Oliveira Mendes , David Lopez Zafra , Nikolay Bojkov Vassilev , Ivo Ribeiro Silva , José Ivo Ribeiro
DOI: 10.1128/AEM.00241-14
关键词:
摘要: During fungal rock phosphate (RP) solubilization, a significant quantity of fluoride (F(-)) is released together with phosphorus (P), strongly inhibiting the process. In present study, effect two F(-) adsorbents [activated alumina (Al2O3) and biochar] on RP solubilization by Aspergillus niger was examined. Al2O3 adsorbed part but also soluble P, which makes it inappropriate for microbial systems. contrast, biochar only while enhancing 3-fold, leading to accumulation up 160 mg P per liter. By comparing values measured in solution at end incubation those from predictive model, estimated that 19 liter can be removed when added 3 g liter(-1) culture medium. Thus, acted as an sink during led concentration less inhibitory presence biochar, A. produced larger amounts citric, gluconic, oxalic acids, whether or not. Our results show enhances through interrelated processes: partial removal increased organic acid production. Given importance acids most RPs contain high concentrations F(-), proposed system offers important technological improvement production fertilizers RP.
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