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| The effect of four biochar on the structure of microbial communities in alluvial soil |
| Received:July 26, 2018 Revised:November 13, 2018 |
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| KeyWord:biochar;alluvial soil;microbial community |
| Author Name | Affiliation | E-mail | | CHEN Yi-xuan | College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | SONG Ting-ting | College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | FANG Ming | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | YU Zhi-guo | College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China | | | LI Jie | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | lijie@caas.cn | | LAI Xin | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | laixin@aepi.org.cn | | ZHANG Gui-long | College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | zgl_2008@126.com |
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| Abstract: |
| This project was carried out in an effort to investigate how biochar affects soil microbial community structures using peanut shell biochar (PBC), maize straw biochar (MBC), aspen biochar (ABC)and bamboo biochar (BBC)applied as a soil amendment to alluvial soil. The amounts of biochar added for each treatment were 0, 20, 40, 80 g·kg-1 and 160 g·kg-1 respectively. After 45 days of incubation, we analyzed and classified microorganisms using the PLFA method and found that the total amount of microorganisms and bacteria increased, but there was a slowing trend in the growth rate, with the addition of PBC, MBC, and ABC. BBC reduced the total amount of microorganisms and bacteria in the soil. All biochar treatments increased the fungi-to-bacteria ratios. While fungi were proved to flourish with the addition of biochar at levels of 20, 40 g·kg-1 and 80 g·kg-1, excessive addition (160 g·kg-1)of PBC and BBC significantly reduced the amount of fungi in the system. The main reasons for the change of the microorganism structures with biochar addition were the subsequent changes in the soil's pH, EC, specific surface area and porosity, as well as some specific physicochemical properties of biochar. We concluded that as opposed to the addition of BBC and MBC, the addition of an appropriate amount of ABC and PBC could better promote the microbial communities in alluvial soil. |
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