气候变化领域集成服务门户(CCPortal): Soil nitrogen availability and microbial carbon use efficiency are dependent more on chemical fertilization than winter drought in a maize-soybean rotation system

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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
	Bao, Wenqing; He, Peng; Han, Lin; Wei, Xiaowei; Feng, Lei; Zhu, Jianqin; Wang, Jihua; Yang, Xuechen; Li, Lu-Jun
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/299571
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	Bao, Wenqing,He, Peng,Han, Lin,et al. 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	Bao, Wenqing.,He, Peng.,Han, Lin.,Wei, Xiaowei.,Feng, Lei.,...&Li, Lu-Jun.(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	Bao, Wenqing,et al."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).