|
| Effect of reductive soil disinfestation incorporated with straw types on soil bacterial community diversity |
| Received:October 27, 2022 Revised:November 25, 2022 |
| View Full Text View/Add Comment Download reader |
| KeyWord:reductive soil disinfestation;straw type;continuous cropping;soil physicochemical property;bacterial community |
| Author Name | Affiliation | E-mail | | ZHAO Yuxin | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | | | LIAO Hongkai | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | liaohongkai66@163.com | | LONG Jian | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | | | LI Juan | Department of Geography and Environmental Science, Guizhou Normal University, Guiyang 550001, China | | | RAN Taishan | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | | | YANG Guomei | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | |
|
| Hits: 1254 |
| Download times: 2513 |
| Abstract: |
| The aim of this research is to compare the effects of reductive soil disinfestation（RSD）incorporated with different types of straw on continuous-cropping soil properties and bacterial communities. RSD treatments incorporating dried corn straw（CS）, dried miscanthus straw（MS）, a dried corn and miscanthus straw mixture（CMD）, and a fresh corn and miscanthus straw mixture（CMW）were set up, with chemical fumigation and flooding as controls, to evaluate the dynamic changes in physicochemical properties and bacterial communities during soil incubation. The results showed that different RSD treatments increased soil organic matter and labile organic carbon content during the incubation period, soil pH showed a trend of increasing first and then decreasing, and the cumulative decrease in soil nitrate nitrogen reached 83%-98%. RSD with a combination of straws improved bacterial community diversity compared to the addition of a single straw, and the Shannon index increased by 49%. In contrast, fresh straw first increased then decreased the bacterial community diversity. Proteobacteria was the dominant phylum in the total bacterial community. The relative abundance of Proteobacteria decreased first and then increased in the CMW group, while decreasing by 51% in the CMD group. At the genus level, the relative abundance of UC-Burkholderiales, UC-Comamonadaceae, Anaeromyxobacter, and Pseudobacteroides were significantly increased in the mixed dry straw group at the end of the culture. Mantel testing showed that characteristic bacterial groups（such as Anaeromyxobacter and Pseudobacteroides） were positively correlated with soil pH and Olsen-P content, and Anaeromyxobacter was significantly positively correlated with nitrate nitrogen content. In general, different degrees of drying and RSD combined with single and mixed straws had different effects on bacterial community abundance and diversity. |
|
|
|
