Studies on Photosynthetic Characteristics of Cardamine Growing in Di erent Site Conditions in the High Selenium Area in Yutangba

Studying the selenium-enriched plants Cardamine grow in Yutangba, compered their photosynthetic characteristics in four different site conditions (hillsides, selenium slag, streamsides and streams). The results show that the net photosynthetic rate, transpiration rate, stomatal conductance of Cardamine showed a single peak curve. The Cardamine grow in the streamsides and streams have higher photosynthetic ability than the Cardamine grow in hillside and selenium slag. It may be because the selenium concentrations in soil moisture and suitable for the growth of Cardamine.