七星关区耕地土壤Ge地球化学特征及其与作物的吸收关系

doi:10.11720/wtyht.2024.1046

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Abstract

Determining the content and absorption by crops of germanium (Ge) in soils of cultivated land holds great significance for the development and utilization of Ge in the land, as well as the scientific seed selection for the land. However, few studies on the Ge element in soils of cultivated land in Qixingguan District have been reported. Based on the data from a project of the geochemical investigation and evaluation of the land quality in the district, this study made statistics of geochemical parameters such as the Ge content and analyzed the geochemical characteristics of Ge in soils and the absorption of Ge by crops. The results show that the soils of cultivated land in Qixingguan District exhibit a Ge content ranging from (0.86~2.48)×10^-6 (average: 1.74×10^-6), which is equivalent to the background value of Ge in China. Based on the geostatistical analysis, this study determined that Ge-rich cultivated land covers an area of 65 853.54 hm², accounting for 47.41% of the total cultivated land in the district, and is primarily distributed in the northwestern and southwestern portions. The biological absorption coefficients (Ax) to Ge in soils by crops are all below 1%, suggesting an extremely low absorption level. This study explored the causes of Ge enrichment in the soils and the environmental factors affecting Ge absorption by crops using methods such as correlation analysis, drawing the following conclusions: ① The Ge content in soils is principally governed by soil parent materials, accompanied by the influence of pedogenetic weathering process for soil formation. These factors, coupled with high organic matter content and slightly acidic soil, contribute to the Ge enrichment in the cultivated land of Qixingguan District; ② The correlation between Ax and pH is slightly negative in acidic soils but positive in neutral to alkaline soils, implying that slightly acidic soil reduces the absorption of Ge by crops in the study area.

Key words： soils in cultivated land Ge geochemical characteristics biological absorption Qixingguan District

Received: 02 February 2023 Published: 16 April 2024

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S151

Corresponding Authors: YANG En-Lin E-mail: 354427643@qq.com;155060162@qq.com

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	Hong-Wei ZHANG
	En-Lin YANG
	Shu-Lin JIAO
	Gui-Yun WANG
	Shan-Jin YANG

Cite this article:

Hong-Wei ZHANG,En-Lin YANG,Shu-Lin JIAO, et al. Ge in soils of cultivated land in Qixingguan District: Geochemical characteristics and absorption by crops[J]. Geophysical and Geochemical Exploration, 2024, 48(2): 534-544.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.1046 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I2/534

19]),land use status(c),soil type and sampling point distribution(d) in the study area
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Location(a),geological background(b)(revised according to the Guizhou Chronicle of China's Regional Geology^[19]),land use status(c),soil type and sampling point distribution(d) in the study area

Soil element index analysis method and detection limit

Statistics of soil geochemical parameters of cultivated layer in the study area

Geochemical distribution characteristics of soil Ge (a) and classification of Ge rich cultivated land (b) in the study area

Classification of Ge content of crops

Ge contents of different crops 10^-6

Crop bioabsorption coefficient (a) and its correlation with soil germanium (b)

Mean soil Ge contents of different soil-forming matrices

Ge contents in different soil properties

Scatterplots of soil germanium contents versus CIA (a) and w(SiO₂)/w(Ge) (b)

Crop bioabsorption coefficient vs soil organic matter (a) and pH (b) scatter plots

Correlation analysis of crop bioabsorption coefficient(Ax)and soil elements

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