| Rhizosphere soil nutrition and bacterial community diversity of Elymus sibiricus in different planting years |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2020.05.02 |
| Key Words: Elymus sibiricus rhizosphere soil nutrition growth years bacterial diversity |
| Author Name | Affiliation | | LIU Yanjun | College of Prataculture, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Ministry of Education, Lanzhou, Gansu 730070, China | | LIU Wenhui | Qinghai Academy of Animal Science and Veterinary Medicine, Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibelan Plateau, Xining, Qinghai 810016, China | | QI Juan | College of Prataculture, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Ministry of Education, Lanzhou, Gansu 730070, China | | YAO Tuo | College of Prataculture, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Ministry of Education, Lanzhou, Gansu 730070, China | | LI Jianhong | College of Prataculture, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Ministry of Education, Lanzhou, Gansu 730070, China | | LI Changning | College of Prataculture, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Ministry of Education, Lanzhou, Gansu 730070, China |
|
| Hits: 2347 |
| Download times: 1249 |
| Abstract: |
| To examine the effects of different planting years on soil nutrition and microbial community, the Illumina sequencing method was used to investigate the diversity and structure of bacterial community in the rhizosphere soil of 3, 4, and 7-year-old Elymus sibiricus (Y3, Y4, and Y7). Results showed that the pH of the rhizosphere soil increased from 7.95 to 8.03 while the total nitrogen (TN), available nitrogen (AN), and available phosphorus (AP) were gradually decreased as the planting years increased. Compared to Y3, TN, AN, and AP in the rhizosphere soil of Y4 decreased 21.9%, 12.0%, and 32.0%, while which they decreased 34.5%, 24.2%, and 38.9% with Y7, respectively. The Chao1 and Shannon indices were also degraded with planting years, while the Chao1 indices of Y3, Y4, and Y7 were 2605.42, 2518.46, and 2483.89, and the Shannon indices were 9.79, 9.65, and 9.62, respectively. Clustering analysis showed that the bacterial communities of rhizosphere soil in 3 and 4-year-old Elymus sibiricus were similar to each other. The bacterial communities’ dominant phyla of all soil samples were Proteobacteria, Actinobacteria, and Acidobacteria. Meanwhile, Norank_c_Subgroup_6, Sphingomonas, Norank_ f_Gemmatimonadaceae, Blastococcus, and RB41 were the dominant genera. Correlation analysis showed that MND1 and Gaiella were negatively correlated with TN, TP, TK, AP, and AK, and were positively correlated with SOM. While Bacillus, RB41, and Norank_ f _67-14 were positively correlated with pH (P<0.001). |
|
|
|