关键词: 土壤, 农产品, 地球化学, 调查评价, 富硒、锌

Abstract: Based on the 1∶50 000 geochemical survey of soil environmental quality, the high-precision element contents or indexes on surface soils and crops in 191.76 km2 were obtained from Jinbi and Jinxing villages, Wumen Mountain Area, Guizhou. The results showed that 99% of the surface soils met the national standard on soil environmental quality, and the proportions of selenium (Se)-rich soils and zinc (Zn)-rich soils could be reached as 62% and 99%, respectively, which were closely related to coal bearing stratum and carbonate stratum. Furthermore, some staple crops, such as teas, soybeans, rapes, corns and garlics growing in the Se-rich soils could meet the Se-rich crop standard. It is important to investigate and evaluate the “green” Se-rich soils and agricultural products in karst areas with fragile ecology. The big database on soil and agriculture products quality was also proposed to ensure food safety in Guizhou.

Key words: soil, agriculture products, geochemistry, investigation and evaluation, selenium-rich and zinc-rich