| Effects of different fertilization patterns on the bacterial community dynamic in saline-alkali paddy soil |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2018.05.21 |
| Key Words: fertilization patterns saline-alkali paddy soil bacterial community 16S rRNA |
|
| Hits: 982 |
| Download times: 571 |
| Abstract: |
| Effects of flue gas desulfurization gypsum by-products and organic fertilizer combinations patterns on soil physicochemical properties and bacterial communities in rice yield were assessed to improve the fertility of saline-alkali soil and determine the best fertilization patterns. Paddy soil from replicated plots representing five treatments were collected at a research site in Ningxia, China. The method, Illumina pyrosequencing of the 16S rRNA gene amplifications was used to analyze soil bacterial community diversity and structure. Our results showed that soil organic carbon (6.74%), alkali-hydrolyzale nitrogen (37.20%), available P (47.83%) and NH+4-N (96.26%) were increased significantly in paddy soils of flue gas desulfurization gypsum by-products and organic fertilizer when compared with control soil. In all samples, Proteobacteria, Bacteroidetes, Gemmatimonadetes, Actinobacteria, Acidobacteria, Firmicutes, Chloroflexi, Spirochaetes, Euryarchaeota and Nitrospirae were the most dominant bacterial phyla representing 96.05%~94.32% of all taxon tags. The soil bacterial community was affected by short term different fertilization patterns by principal co-ordinates analysis. The α-diversity index of the bacterial community structure increased with organic fertilizer addition . At the genus level, the relative abundance of 11 dominant bacterial genus, such as Halomonas, Sulfurimonas and Lutibacter were significantly accumulated in the paddy soil of T4 treatment. Redundancy analysis indicated that alkali-hydrolyzale nitrogen and NH+4-N exerted strong influences on the structure of the paddy soil bacterial community and explained 16.9% and 14.0% (P＜0.05) of community variances between samples, respectively. Our results suggest that short-term different fertilization patterns of saline-alkali paddy soil is improved effectively in the treatment 4. The treatment of flue gas desulfurization gypsum by-products 31 250 kg·hm-2 and organic fertilizer 25 000 kg·hm-2 (T4) affected on the structure of the paddy soil bacterial community. |
|
|
|