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| Effects of solid biofertilizers of phosphate-solubilizing fungi on maize growth and the bacterial community structure in rhizospheres |
| Received:November 28, 2017 |
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| KeyWord:Penicillium oxalicum;Aspergillus niger;available phosphorus;solid-state fermentation;bacterial community structure |
| Author Name | Affiliation | E-mail | | CHEN Sha-sha | College of Resources and Environmental Sciences, Nanjing Agricultural University, Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Nanjing 210095, China | | | SUN Min | College of Resources and Environmental Sciences, Nanjing Agricultural University, Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Nanjing 210095, China | | | WANG Wen-chao | College of Resources and Environmental Sciences, Nanjing Agricultural University, Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Nanjing 210095, China | | | LI Zhen | College of Resources and Environmental Sciences, Nanjing Agricultural University, Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Nanjing 210095, China | | | WANG Shi-mei | College of Resources and Environmental Sciences, Nanjing Agricultural University, Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Nanjing 210095, China | smwang@njau.edu.cn | | DAI Le-tian | College of Resources and Environmental Sciences, Nanjing Agricultural University, Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Nanjing 210095, China | | | XU Yang-chun | College of Resources and Environmental Sciences, Nanjing Agricultural University, Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Nanjing 210095, China | |
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| Abstract: |
| Phosphate-solubilizing microorganisms (PSMs) play important roles in phosphorus cycling, and can convert insoluble P into available P. The application of phosphate-solubilizing biofertilizers is an effective way to improve the P utilization of soils. In this study, two strains of Penicillium oxalicum NJDL-03 and Aspergillus niger NJDL-12, with distinct abilities of phosphate solubilization, were applied to an incubated soil sample. The P release was evaluated in the soil using abundant carbonates. In addition, the growth of maize and the bacterial community structure in the rhizosphere was studied. The results showed that NJDL-03 and NJDL-12 were more effective in solubilizing phosphorus than Enterobacter sp. San8. The results of the maize pot experiment showed that the soil availability of P for NJDL-03, NJDL-12 and San8 increased by 4.36, 5.03, and 0.71 folds, compared to CK. The dry weight of plants treated with biofertilizers NJDL-03, NJDL-12, San8, and Substrate, increased by 67.14%, 67.70%, 33.96%, and 24.04% respectively, compared with CK. The abundance of Firmicute bacteria in the soil was significantly lower than that in CK. Moreover, the populations of Sphingomonas, Mycobacterium, Plesiocystis, and Halotalea were significantly increased after the application of the biofertilizers, while for Lysinibacillus and Lysobacter, the effect was opposite. Phosphate-solubilizing biofertilizers could obviously increase the soil availability of P and promoted the growth of maize. |
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