气候变化领域集成服务门户(CCPortal): Accumulation characteristics, driving factors, and model prediction of cadmium in soil-highland barley system on the Tibetan Plateau

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DOI	10.1016/j.jhazmat.2023.131407
	Accumulation characteristics, driving factors, and model prediction of cadmium in soil-highland barley system on the Tibetan Plateau
	Li, Ruxia; Zhang, Ru; Yang, Yi; Li, Yonghua
发表日期	2023
ISSN	0304-3894
EISSN	1873-3336
卷号	453
英文摘要	Cadmium (Cd) poses major human health problems due to its high toxicity and organ bioaccumulation potential. This study collected and analysed 130 pairs of representative soil-highland barley samples on the Tibetan Plateau. The total soil Cd content (Cd-soil), available soil Cd (Cd-ava), and highland barley Cd contents (Cd-barley) ranged from 0.03 to 0.46 mg kg -1, 0.006-0.185 mg kg -1, and 0.57-13.62 mu g kg-1, with mean values of 0.19 +/- 0.01 mg kg -1, 0.045 +/- 0.003 mg kg-1, and 4.57 +/- 0.17 mu g kg-1, respectively. Redundancy analysis (RDA) demonstrated that geographic factors and soil properties explained 28.46% of the variation in Cd-soil and Cd-ava, and precipitation (14.6%) and pH (9.1%) were the dominant factors. The structural equation model (SEM) indicated that Cd-soil and Cd-ava were predominantly controlled by pH. Furthermore, the Cd-soil, Cd-ava, and Cd-barley with significantly different environmental conditions were more accurately predicted by condi-tional inference trees-multiple linear regression (CITs-MLR). When Cd-soil is more than 0.376 mg kg -1, Cd-ava obtains the most accurate predictor (R2 =0.64, P < 0.01). This study provides new scientific insight into un-derstanding the environmental biogeochemical nexus of Cd in the complex and fragile plateau environment and evaluating food security on the Tibetan Plateau under the self-sufficiency model of highland barley.
关键词	Cadmium Highland barley Soil properties Geographic factors Tibetan Plateau
英文关键词	HEAVY-METALS; RICE; CD; AVAILABILITY; BIOAVAILABILITY; ENRICHMENT; THRESHOLD; POLLUTION; BIOCHAR; CHINA
WOS研究方向	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000983589200001
来源期刊	JOURNAL OF HAZARDOUS MATERIALS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283861
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Li, Ruxia,Zhang, Ru,Yang, Yi,et al. Accumulation characteristics, driving factors, and model prediction of cadmium in soil-highland barley system on the Tibetan Plateau[J],2023,453.
APA	Li, Ruxia,Zhang, Ru,Yang, Yi,&Li, Yonghua.(2023).Accumulation characteristics, driving factors, and model prediction of cadmium in soil-highland barley system on the Tibetan Plateau.JOURNAL OF HAZARDOUS MATERIALS,453.
MLA	Li, Ruxia,et al."Accumulation characteristics, driving factors, and model prediction of cadmium in soil-highland barley system on the Tibetan Plateau".JOURNAL OF HAZARDOUS MATERIALS 453(2023).