黑龙江双阳河流域土壤—水稻—人体系统锗的分布特征、迁移转化及影响因素

doi:10.11720/wtyht.2022.0084

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Abstract

Soil germanium natural endowment, genesis sources, ecological and environmental effects and human health assessment are important research directions in the ecological geology of black soil, and the quantitative study of germanium distribution characteristics, migration transformation and influencing factors in the soil-rice human system is of great significance to the development of germanium-rich agricultural products and human health in black soil areas. Based on the 1∶50,000 ecogeochemical survey of land quality in the Shuangyang River Basin, we obtained germanium and other elemental data from multi-media such as soil-forming parent material, top soil, rice seeds, root soil and human hair, and used GIS and SPSS software to statistically analyze the data. The results showed that the germanium content of the top soil ranged from 0.996×10^-6 to 1.626×10^-6, with an average value of 1.326×10^-6, and the high value areas were mainly distributed in the northwest and central south of the north side of Shuangyang River; 70.55 km² and 166.9 km² of germanium-rich and germanium-sufficient arable land were delineated, which had a greater potential for developing green germanium-rich and selenium-rich agricultural products. Soil-forming parent material is the main factor affecting the germanium content of topsoil, and soil type and land use type have less influence; soil environment with acidic and organic matter deficiency may be more favorable for germanium enrichment. The germanium content of rice seeds ranged from 0.24×10^-6 to 3.40×10^-6, with a mean value of 1.59×10^-6, and the samples meeting the moderate and strong uptake criteria accounted for 40% and 60%, respectively, and were at significantly germanium-rich levels. The germanium uptake coefficient (Ax)was significantly negatively correlated with the root soil germanium content (p=-0.34^*), indicating that low concentrations of soil germanium have a promoting effect on rice growth and development, and high concentrations of germanium have an inhibitory or toxic effect on rice growth; it was positively correlated with the root soil pH (p=0.40), indicating that the migration and transformation ability of rice to germanium elements gradually increases with the increase of soil pH. Adult hair germanium levels were at normal healthy levels, but germanium levels in immature female hair significantly exceeded the reference range, and more detailed studies are needed for human health assessment.

Key words： germanium migration transformation rice root soil human hair human health geological survey engineering

Received: 08 February 2022 Published: 03 January 2023

ZTFLH:

P632

Corresponding Authors: Dai Hui-Min E-mail: ls476476@163.com;daihuimin78@126.com

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	Shuai Liang
	Hui-Min Dai
	Jun Zhao
	Guo-Dong Liu
	Kai Liu
	Fu-Rong Zhai
	Xiao-Meng Han
	Ming-Hui Wei
	Zhe-Huan Zhang

Cite this article:

Shuai Liang,Hui-Min Dai,Jun Zhao, et al. Distribution characteristics, migration transformation and influencing factors of Ge in soil-rice system in Shuangyang River Basin, Heilongjiang Province[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1555-1564.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.0084 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1555

Regional geological overview of the study area

Map of soil types and ecological sample collection points

指标	检出限/10^-6	分析方法	指标	检出限/10^-6	分析方法
As	0.5	AFS	Zn	0.6	XRF
B	1	AES	Si $O 2 *$	0.05	XRF
Cd	0.02	ICP-MS	Al₂ $O 3 *$	0.02	ICP-OES
Cr	0.90	ICP-MS	TFe₂ $O 3 *$	0.02	XRF
Cu	0.29	ICP-MS	CaO^*	0.03	XRF
Hg	0.0003	CV-AFS	MgO^*	0.03	XRF
Mn	4	XRF	Na₂O^*	0.03	XRF
Mo	0.06	ICP-MS	K₂O^*	0.02	ICP-OES
N	19	VOL	Ge	0.059	ICP-MS
Ni	0.80	XRF	Se	0.01	AFS
P	6	XRF	pH	0.10	ISE
Pb	0.3	ICP-MS	Corg^*	0.03	VOL

Elemental analysis methods and detection limits

Statistics of germanium geochemical parameters in surface soil

Distribution map of soil germanium geochemical grades

Distribution map of germanium-rich arable and germanium-sufficiency land

Projection map of germanium content in soil profile

Ge content characteristics of different soil types in the study area

Correlation statistics of soil germanium content and soil physicochemical indexes

Statistics of some elemental geochemical parameters of 61 rice root soil

Statistics of some elemental geochemical parameters of 61 rice seeds

Comparison of distribution of germanium content in rice root soil and seeds

Correlation statistics of germanium absorption coefficient of rice and physical and chemical indexes of root soil

Germanium content in human hair10^-6

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