气候变化领域集成服务门户(CCPortal): Optimized fertilization mitigated carbon and nitrogen losses in a Solonchak

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DOI	10.1111/ejss.13474
	Optimized fertilization mitigated carbon and nitrogen losses in a Solonchak
	Zhang, Sheng; Liu, Ji; Feng, Ying; Hao, Xingming; Liang, Yanning; Xue, Lihua; Zhao, Xiaoning
发表日期	2024
ISSN	1351-0754
EISSN	1365-2389
起始页码	75
结束页码	2
卷号	75 期号:2
英文摘要	With the rapid expansion of agriculture on saline-alkaline soils, environmental problems such as increased greenhouse gas (GHG) emissions, eutrophication and soil degradation are becoming increasingly serious. To clarify the characteristics of carbon (C) and nitrogen (N) cycling and their loss mechanisms in cultivated saline-alkaline soils, an undisturbed soil column experiment was conducted to analyse C and N leaching and GHG emissions by applying different fertilizer rates. The experiment had six treatments using N-(NH4)SO4 over a 40-day seedling stage, with and without maize. Treatments were: no N with maize (0Nmaize: 0 kg N ha-1), reduced N with maize (RNmaize: 63 kg N ha-1), conventional N with maize (CNmaize: 160 kg N ha-1) and their equivalents without maize (0Nsoil: 0 kg N ha-1; RNsoil: 63 kg N ha-1; CNsoil: 160 kg N ha-1). The results indicated that reduced N with maize reduced the N2O emission by 21%, with N leaching (TN: 41%, NO3--N: 19%, NH4+ - N: 63%) within 15 days after fertilization, but had no significant effect on CH4 emission compared to conventional N with maize. Therefore, reduced N with maize had the smallest N loss, which accounted for 1.5% of the relative percentage of N flow including N2O (0.3%), N leaching (2%), aboveground biomass N (76%) and root biomass N (22%). Compared to conventional N with maize, reduced N with maize significantly reduced N leaching by 40% because conventional N with maize greatly exceeded the crop N uptake when maize root length was only within 20 cm. Reduced N without maize reduced CO2 emission (19%) compared to conventional N without maize. Uncultivated saline-alkaline soils face greater N overuse and leaching risk because higher NO3--N leaching (6.9 mg L-1) that occurred in bare soils without fertilization, which increased by 2.6-3.6 times when the N input increased from 63 to 160 kg N ha-1 compared to control. In conclusion, reducing conventional N fertilizer inputs by 60% is not only an effective strategy to reduce CO2 and N2O emission and N leaching but also effectively absorbs C, and the N retained in the soil tillage layer can help to meet maize seedling growth requirements in Solonchaks.
英文关键词	C losses; greenhouse gas; maize; N leaching; N losses
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:001189534500001
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305791
作者单位	Chinese Academy of Sciences; Xinjiang Institute of Ecology & Geography, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Institute of Earth Environment, CAS; Central China Normal University; Nanjing University of Information Science & Technology; Xinjiang Academy of Agricultural Sciences
推荐引用方式 GB/T 7714	Zhang, Sheng,Liu, Ji,Feng, Ying,et al. Optimized fertilization mitigated carbon and nitrogen losses in a Solonchak[J],2024,75(2).
APA	Zhang, Sheng.,Liu, Ji.,Feng, Ying.,Hao, Xingming.,Liang, Yanning.,...&Zhao, Xiaoning.(2024).Optimized fertilization mitigated carbon and nitrogen losses in a Solonchak.EUROPEAN JOURNAL OF SOIL SCIENCE,75(2).
MLA	Zhang, Sheng,et al."Optimized fertilization mitigated carbon and nitrogen losses in a Solonchak".EUROPEAN JOURNAL OF SOIL SCIENCE 75.2(2024).