Bioavailability and influencing factors of selenium-rich soil
Based on the survey data of land quality geochemical survey and evaluation of selenium-rich resources,soil available selenium content and its influencing factors were analyzed in the study area,and the bioavailability of selenium-rich soil was analyzed combining with the result of crop investigation.The results showed that the available selenium content of soil in the study area ranged from 0.006 to 0.071 mg/kg,with an average value of 0.018 mg/kg.The proportion of available selenium in total soil was 1.69%～11.49%.Available selenium had a positive correlation with total selenium content and organic matter in soil,and a weak negative correlation with soil pH value.There is potential to develop selenium rich industry in this area,and the selenium rich ability of different crops is rapeseed>tea>rice.It was found that the soil selenium>0.3 mg/kg could be used as a potential area for developing selenium-rich crops,and by artificially adjusting soil pH and organic matter content the content of available selenium in the soil could be increased,promoting crop absorptiou.
NETL
NSTL
万方数据
维普
