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Geoscience ›› 2023, Vol. 37 ›› Issue (03): 767-777.DOI: 10.19657/j.geoscience.1000-8527.2023.024

• Experimental, Applied and Environmental Geochemistry • Previous Articles     Next Articles

Strontium in Soil-crop Migration and Enrichment Discussion on the Standard of Strontium Enrichment in Crops:A Case Study from the Shihe Area in Gushi, Henan

WANG Dongxiao1,2(), YUAN Dezhi1   

  1. 1. No.3 Institute of Geological & Mineral Resources Survey of Henan, Xinyang,Henan 464000, China
    2. Henan Natural Resources Science and Technology Innovation Center (Research on the Application of Information Perception Technology), Xinyang,Henan 464000, China
  • Received:2022-06-30 Revised:2023-03-27 Online:2023-06-10 Published:2023-07-20

Abstract:

By systematically collecting and analyzing soil and crop samples in the Shihe river basin of Gushi (Henan Province), and conducting geochemical evaluation of land quality, we identified regional soil Sr geochemical characteristics, influencing factors, and migration and enrichment mechanisms in soil and crops, i.e., residue state>strongly organic bound state>ion-exchange state>ferromanganese oxidation state>humic acid bound state>carbonate bound state>water-soluble state account for 98%. Strontium exists primarily in the soil in an insoluble stable form. In a weakly acidic environment, the insoluble Sr-bearing minerals (SrSO4 and SrCO3) hydrate and hydrolyze to form water-soluble Sr(HCO3)2 and SrCl2, which are absorbed and utilized by plants to facilitate Sr migration in soil and crops. The Sr-rich standard for peanut, wheat, corn, rice, and other crops was proposed by comparing the Sr content of related crops (domestic and international), i.e., the lower limit is 0.65 mg/kg for Sr-rich rice, and 1.08 mg/kg for Sr-rich peanut, wheat, and corn. According to this Sr content standard, our wheat and peanut (and some rice) samples are Sr-rich. Our results provide a new reference for the development of Sr-rich land resource and Sr-rich agricultural products in the Shihe river basin.

Key words: Shihe river basin, Sr migration, Sr standard, soil and crop, Sr-rich agricultural product

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