气候变化领域集成服务门户(CCPortal): Limited plant community responses to long-term phosphorus addition in a nitrogen-enriched alkaline desert steppe

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DOI	10.1007/s11104-024-06760-1
	Limited plant community responses to long-term phosphorus addition in a nitrogen-enriched alkaline desert steppe
	Han, Cui; Yu, Hailong; Fang, Zhao; Wang, Bin; Huang, Juying
发表日期	2024
ISSN	0032-079X
EISSN	1573-5036
英文摘要	Aims Dryland ecosystems are highly susceptible to variations in nutrient availability. The effects of nitrogen (N) availability on plant communities have been widely studied. However, to date, relatively few studies have focused on the effects of phosphorus (P) input on plant biomass and diversity, particularly in alkaline drylands with elevated N deposition. MethodsA long-term field experiment with a multi-level P addition rate (0-16 g P m-2 yr-1) plus 5 g N m-2 yr-1 in an alkaline desert steppe was conducted in northwestern China from 2015 to 2021. The effects of nutrient addition on plant community variation were investigated. Their relationships with soil properties, plant-microbe-soil C: N:P stoichiometry, and climatic factors were also analyzed. Results Under N addition, plant community biomass and diversity were slightly affected by P addition (P > 0.05). Although there was significant interannual variability in the plant community (P < 0.01), the interaction between P addition and year was not significant (P > 0.05). Variance partitioning and structural equation modelling showed that plant community variation under N addition was highly resistant to P addition and that soil properties (electric conductivity, available nutrients, and phosphatase activity), plant-microbe-soil C: N:P stoichiometry (plant total N, soil total N, and microbial biomass P), and climatic factors (average monthly temperature and precipitation) combined to regulate their stability. Conclusions Our findings indicate that the effects of long-term P addition on the plant communities of desert steppes with N addition are limited. Future P enrichment may not pose substantial risks of plant community alteration in dryland ecosystems under N deposition.
英文关键词	Alkaline soil; C:N:P stoichiometry; Nutrient addition; Nutrient limitation; Plant community composition
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:001234181100003
来源期刊	PLANT AND SOIL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302218
作者单位	Ningxia University; Ningxia University; Northwest A&F University - China; Chinese Academy of Sciences; Institute of Soil & Water Conservation (ISWC), CAS; Chinese Academy of Forestry; Research Institute of Subtropical Forestry, CAF
推荐引用方式 GB/T 7714	Han, Cui,Yu, Hailong,Fang, Zhao,et al. Limited plant community responses to long-term phosphorus addition in a nitrogen-enriched alkaline desert steppe[J],2024.
APA	Han, Cui,Yu, Hailong,Fang, Zhao,Wang, Bin,&Huang, Juying.(2024).Limited plant community responses to long-term phosphorus addition in a nitrogen-enriched alkaline desert steppe.PLANT AND SOIL.
MLA	Han, Cui,et al."Limited plant community responses to long-term phosphorus addition in a nitrogen-enriched alkaline desert steppe".PLANT AND SOIL (2024).