|
| Microbial screening of saline-alkali soil remediation agents |
| Received:November 12, 2022 Revised:December 06, 2022 |
| View Full Text View/Add Comment Download reader |
| KeyWord:growth-promoting bacillus;saline-alkali soil remediation;exopolysaccharide;phosphate solubilizing;potassium solubilizing |
| Author Name | Affiliation | E-mail | | ZHANG Mi | Sino Green Agri-Biotech Co. Ltd, Beijing 102101, China | | | ZHAO Wenjing | Sino Green Agri-Biotech Co. Ltd, Beijing 102101, China | | | ZHAO Yanan | China Agricultural University, Beijing 100193, China | | | WANG Qi | China Agricultural University, Beijing 100193, China | | | ZHANG Lixia | Sino Green Agri-Biotech Co. Ltd, Beijing 102101, China | Zhanglixia6240@163.com |
|
| Hits: 2288 |
| Download times: 2620 |
| Abstract: |
| In this study, salt and alkali resistant plant growth promoting rhizobacteria were screened to provide high quality strains for the restoration of saline-alkali soils. The rhizosphere of saline-alkali plants was sampled to screen the strains with growth-promoting effect, saline-alkaline resistivity, ability to produce exopolysaccharides, and solubilize phosphate and potassium. The final strains were identified based on their morphology, physiology, and biochemistry. A sunflower experiment was carried out in saline-alkali soils to investigate whether the screened strains were effective. Plant growth and soil indexes were collected as indicators. B25 and B43 were screened and identified as Bacillus megateriumde Bary and Bacillus amyloliquefaciens, respectively. In the sunflower experiment, the plant height, stem diameter, grain weight, seed setting rate, and yield of treatment group were higher than the control group by 1.53%, 8.44%, 7.23%, 3.40%, and 12.37%, respectively. Soil pH was found to be lower by 0.4. The content of the organic matter, total nitrogen, and the available phosphorus and potassium in the soil were reported to be higher by 42.48%, 15.04%, 41.52%, and 31.13%, respectively. Salt content of the treatment group was lower by 1.76%. In conclusion, B25 and B43 have strong ability to produce exopolysaccharides, can promote sunflower growth, and repair saline-alkali soils, while also acting as good quality strains for saline-alkali soil remediation. |
|
|
|
