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| DOI | 10.3389/fmicb.2024.1304985 |
| Soil nitrogen availability and microbial carbon use efficiency are dependent more on chemical fertilization than winter drought in a maize-soybean rotation system | |
| 发表日期 | 2024 |
| EISSN | 1664-302X |
| 起始页码 | 15 |
| 卷号 | 15 |
| 英文摘要 | Soil nitrogen (N) availability is one of the limiting factors of crop productivity, and it is strongly influenced by global change and agricultural management practices. However, very few studies have assessed how the winter drought affected soil N availability during the subsequent growing season under chemical fertilization. We conducted a field investigation involving snow removal to simulate winter drought conditions in a Mollisol cropland in Northeast China as part of a 6-year fertilization experiment, and we examined soil physicochemical properties, microbial characteristics, and N availability. Our results demonstrated that chemical fertilization significantly increased soil ammonium and total N availability by 42.9 and 90.3%, respectively; a combined winter drought and fertilization treatment exhibited the highest soil N availability at the end of the growing season. As the growing season continued, the variation in soil N availability was explained more by fertilization than by winter drought. The Mantel test further indicated that soil Olsen-P content and microbial carbon use efficiency (CUE) were significantly related to soil ammonium availability. A microbial community structure explained the largest fraction of the variation in soil nitrate availability. Microbial CUE showed the strongest correlation with soil N availability, followed by soil available C:P and bacteria:fungi ratios under winter drought and chemical fertilization conditions. Overall, we clarified that, despite the weak effect of the winter drought on soil N availability, it cannot be ignored. Our study also identified the important role of soil microorganisms in soil N transformations, even in seasonally snow-covered northern croplands. |
| 英文关键词 | ammonium availability; Mollisol cropland; nitrate availability; phospholipid fatty acid analysis; snow removal; soil microbial characteristics |
| 语种 | 英语 |
| WOS研究方向 | Microbiology |
| WOS类目 | Microbiology |
| WOS记录号 | WOS:001191933600001 |
| 来源期刊 | FRONTIERS IN MICROBIOLOGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/299570 |
| 作者单位 | Harbin Normal University; Chinese Academy of Sciences; Northeast Institute of Geography & Agroecology, CAS; Jilin Normal University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | . Soil nitrogen availability and microbial carbon use efficiency are dependent more on chemical fertilization than winter drought in a maize-soybean rotation system[J],2024,15. |
| APA | (2024).Soil nitrogen availability and microbial carbon use efficiency are dependent more on chemical fertilization than winter drought in a maize-soybean rotation system.FRONTIERS IN MICROBIOLOGY,15. |
| MLA | "Soil nitrogen availability and microbial carbon use efficiency are dependent more on chemical fertilization than winter drought in a maize-soybean rotation system".FRONTIERS IN MICROBIOLOGY 15(2024). |
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