| Effects of deep tillage and straw returning on microbial community functional diversity in soil |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2022.03.22 |
| Key Words: deep tillage straw returning microbial community functional diversity |
| Author Name | Affiliation | | ZHANG Naiwen | Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, Heilongjiang 150081, China
College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang 150030, China | | HAN Xiaozeng | Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, Heilongjiang 150081, China | | PIAO Yongjie | Agricultural Technology Extension Center of Beidahuang Group 852 Company,Shuangyashan, Heilongjiang 155100, China | | JIANG Rui | Agricultural Technology Extension Center of Beidahuang Group 852 Company,Shuangyashan, Heilongjiang 155100, China | | YAN Jun | Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, Heilongjiang 150081, China | | CHEN Xu | Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, Heilongjiang 150081, China | | LU Xinchun | Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, Heilongjiang 150081, China | | ZOU Wenxiu | Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, Heilongjiang 150081, China | | YAN Lei | College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang 150030, China |
|
| Hits: 517 |
| Download times: 328 |
| Abstract: |
| To explore the effects of deep tillage and straw returning on soil microbial community functional diversity in soil, we examined changes in functional diversity of soil microbial communities using Biolog-Eco microplate method at 0~15 cm and 15~35 cm soil layers. Four treatments including conventional tillage (CT), straw incorporation with conventional tillage (SCT), subsoil tillage (ST) and straw incorporation with subsoil tillage (SST) were set up. The results showed that the utilization of carbon sources by soil microorganisms more significantly improved in the SCT and SST treatments than the CT treatment in both 0~15 cm and 15~35 cm soil layers, and the utilization degree of carbon sources increased with the extension of time under different treatments. Carbohydrates, amino acids, polymers, carboxylic were the most important carbon sources for microbial metabolism. Shannon index and Simpson index were not significantly affected by different treatments, but Mclntosh index was significantly increased in ST than CT in 0~15 cm soil layer. Principal component analysis showed that the metabolic function of microbial community was different between straw returning and no straw returning. Compared with CT, DOC, MBC and MBN contents under SST treatment in 15~35 cm soil layer were significantly increased by 17.25%, 50.00% and 168.10%, respectively. In addition, SEM model showed that deep tillage treatment affected soil Mclntosh index possibly through the change of soil DOC content. Principal component analysis showed that the metabolic function of microbial community was different between straw returning and no straw returning. |
|
|
|