Land use indirectly affects the cycling of multiple nutrients by altering the diazotrophic community in black soil
| 第一作者： |
Yan, Jun |
| 英文第一作者： |
Yan, Jun |
| 联系作者： |
Chen, Xu;Zou, Wenxiu |
| 英文联系作者： |
Chen, Xu;Zou, Wenxiu |
| 发表年度： |
2022 |
| 卷： |
|
| 摘要： |
Diazotrophic bacteria, as one of most important group of soil microorganisms, play critical roles in multiple ecosystem functions (i.e., multifunctionality). However, little information is available about the diazotrophic community in driving soil nutrient cycling and multifunctionality at different depths with distinct vegetation in the black soil region of northeastern China. To learn the interactions among land use, cycling of multiple nutrients and the diazotrophic community, we performed this study in grassland (GL), forested land and a cropland (CL) in soils at depths of 0-15 cm and 15-35 cm. RESULTS The highest nifH gene abundances were found in the CL treatment, while the highest diazotrophic species richness and diversity were detected in the GL in both soil layers. The nifH gene abundance was directly/positively correlated with soil bulk density and negatively correlated with land use and soil depth. The index of multiple nutrient cycling was directly/negatively affected by soil depth and indirectly/positively affected by land use. Land use directly/negatively affected soil pH and thus indirectly affected the diazotrophic community composition and the nutrient cycling index. The diversity and community composition of the diazotrophs together accounted for 95% of the differences in the multiple nutrient cycling index. CONCLUSION Soil diazotrophic communities undertake important roles in maintaining nutrient cycling and soil multifunctionality at depths of 0-15 cm and 15-35 cm layers with different land uses of the black soil region of China. |
| 刊物名称： |
Journal of the Science of Food and Agriculture |
| 参与作者： |
J. Yan, X. Z. Han, X. C. Lu, X. Chen and W. X. Zou |
吉公网安备22017302000214号
