Based on the comprehensive collection of samples from the alkaline soil in the Shizuishan area, Ningxia, this study analyzes the geochemical indicators of selenium and available selenium in soil in the area.The results are as follows. The seleniumin soil in the study area is mainly originated from the black rock series in the Helan Mountain area, followed by siltation brought in by the agricultural irrigation water diverted from the Yellow River. The bioavailability of selenium in the study area is at a relatively high level, and the effective selenium enrichment and above covers 79.2% of the whole study area, with an area of about 777.2 km2. The content of different forms of selenium is in the order ofresidualselenium>strongly organic matter-bound selenium>humic acid-bound selenium>ion exchangeableselenium≈water-soluble selenium > carbonate-bound selenium≈iron manganese oxide-boundselenium. The total selenium content is limited, while thewater-soluble selenium content is relatively high. The higher the total nitrogen and organic matter content in soil, the higher the total selenium and available selenium content. As the salt content in soil in the study area increases, the bioavailability of seleniumtends to gradually increase. The irrigation-silted soiland thefluvo-aquic soil with a pH value between 7.5 and 9 have moderate total selenium content and high available selenium content, and they are high-quality areas for planting selenium-rich agricultural products.
王志强, 杨建锋, 魏丽馨, 石天池, 曹园园. 石嘴山地区碱性土壤硒地球化学特征及生物有效性[J]. 物探与化探, 2022, 46(1): 229-237.
WANG Zhi-Qiang, YANG Jian-Feng, WEI Li-Xin, SHI Tian-Chi, CAO Yuan-Yuan. Geochemical characteristics and bioavailability of selenium in alkaline soil in Shizuishan area, Ningxia. Geophysical and Geochemical Exploration, 2022, 46(1): 229-237.
Wei R, Hou Q Y, Yang Z F, et al. An analysis of speciation of selenium asits transformation and enrichment in root soil of Poyang lake basin, Jiangxi Province[J]. Geophysical and Geochemical Exploration, 2012,36(1):109-113.
Yang K, Li X L, Zhang J Y, et al. Selenium bioavailability and the Influential Factors in potentially selenium enriched soils in Lujiang County, Anhui Province[J]. Research of Environmental Sciences, 2018,31(4):715-724.