Evaluation Of Se Content In The Tea And Tea Garden Soil And Studies On Controlled Release Of Se Fertilizers

Selenium is a necessary trace element for the health of people. Lack of selenium can cause many diseases, which can be prevented and cured by the complement of the selenium. The appropriate complement of Selenium is required because of the little gap between the deficiency and the excess. To drink selenium-enriched tea is one of the best ways to complement selenium. Anhui province is famous for the mass production of tea. So it is significant to mensurate Se content of tea and soil in tea gardens. Based on the results, many measures can be taken to improve the quality of tea, helping promote the development of our provincial economy.Firstly, we studied the way of trace selenium determination systematically. The results indicated that the hydride generation-atomic fluorescence spectrometry could be applied to analyze the Se content of tea and soil. The method was more suitable for all kinds of tea and soil than others.Subsequently, the Se content of the tea products and soil, which were obtained from several famous tea gardens in Anhui province, was appraised. The results suggested that except Shitai county, whose Se content in the soil was 5.7mg/kg, others could be all classified with the middle or lack level, with the average content of 0.212mg/kg. Correspondingly, only the tea products of Shitai county could reach the Se-enriched criterion of the People Republic of ChinaFinally, in order to solve the problem of the lack in tea, we invented four kinds of controlled-release Se fertilizers, and the longevity of the fertilizers was evaluated using water leaching in soil column.