Provincial-scale Soil As Migration and Transformation and Rice Safe Planting Zoning: A Case Study of Guizhou Province

• Published in: Huanjing kexue Vol. 45; no. 3; p. 1781
• Main Authors: Dong, Xin-Yue, Wu, Yong, Zhou, Zi-Han, Wang, Fo-Peng, Zhang, Yun-Xia, Song, Bo
• Format: Journal Article
• Language: Chinese
• Published: China 08.03.2024
• Subjects: health risk; As; paddy field; rice; Guizhou Province
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.202305007

To explore the distribution characteristics of paddy soil and rice AS content, as well as the health risks of rice consumption, and to evaluate the safe planting ability of rice, 209 paddy soil samples and 1 567 groups of paddy soil-rice samples were collected, their As content and basic soil physical and chemical properties were determined, and the single-factor pollution index method was used to evaluate the pollution degree of the samples. The results showed that:① the soil of paddy fields in Guizhou Province was mainly neutral, and its fertilizer retention capacity and organic matter content were above the medium level, and the soil was relatively fertile. The range of (As) in paddy soil was 0.042-91.75 mg·kg , the geometric mean was 10.03 mg·kg , and the cumulative effect of paddy soil As was lower than that of natural soil As ( <0.05) by independent sample . Compared with the screening value (0.2 mg·kg ) of the Soil Pollution Risk Management and Control Standard for Agricultural Land (GB 15618-2018), th