| Effects of three saline\|alkali tolerant growth\|promoting bacteria on the rhizosphere microecology of mung bean |
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| DOI：10.7606/j.issn.1000-7601.2022.01.16 |
| Key Words: saline\|alkali soil growth\|promoting bacteria mung bean bacterial metabolism function bacterial diversity rhizosphere microecology |
| Author Name | Affiliation | | WANG Yanyu | College of Agricultural, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | LIU Shuang | College of Agricultural, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | LI Xin | College of Agricultural, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | WANG Siwen | College of Agricultural, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | LIU Quan | College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | YIN Kuide | College of Agricultural, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | ZHANG Xingmei | College of Agricultural, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China |
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| Abstract: |
| This pot experiment used 3 saline\|alkali tolerant growth\|promoting bacteria (Zobellella, Serratia and Bacillus) isolated from the saline\|alkali soil in Daqing area to examine the effects of single and compound bacteria on the growth of mung bean plants under saline\|alkali stress. The Biolog\|Eco board and high\|throughput sequencing technology was employed to detect the bacterial metabolic function and bacterial diversity changes in the rhizosphere soil of mung bean after the application of saline\|alkali tolerant growth\|promoting bacteria. The results showed that compared with the control, the fresh root weight of mung bean root system increased by 19.27% under the treatment of the strain S29. The fresh weight and dry weight of mung bean root system increased by 25.85% and 25.00%, 22.93% and 22.73%, 31.22% and 29.55% under the treatment of strains KM1, NM8 and compound bacteria, respectively. Inoculation of growth\|promoting bacteria improved the soil enzyme activity of mung bean rhizosphere and the metabolic ability of soil bacteria. The soil invertase and urease activities under the compound bacteria treatment were the highest, which were 1.35 times and 1.16 times higher than under the control, respectively. The order of average well color development (AWCD) of mung bean rhizosphere soil bacteria when cultured for 240 h was: KM1>compound bacteria>S29>NM8>CK. High\|throughput sequencing showed that saline\|alkali tolerant growth\|promoting bacteria increased the bacterial diversity and species richness of mung bean rhizosphere soil and promoted the growth of beneficial Proteobacteria, Gemmatimonadetes and Cyanobacteria. Therefore, saline\|alkali tolerant growth\|promoting bacteria promoted the growth of mung bean roots under saline\|alkali stress, improved rhizosphere micro\|ecology, and alleviated the damage of saline\|alkali stress to mung bean. The compound bacteria had better growth\|promoting effects. |
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