用亚热带茶区的４种未垦荒地土壤作土柱模拟，研究了重施尿素和表覆茶树落叶对土壤酸化的影响。结果表明，尿素和茶树落叶处理都能酸化土壤，尤以０～２０ｃｍ的表层最为明显，其中又以赤红壤和黄壤的酸化比红壤和黄棕壤明显。文中还对尿素和茶树落叶对茶园土壤的酸化作用、酸化过程和不同土类的酸化差异进行了讨论。 Soil samples from four un-cultivated wasteland soils in subtropical tea areas were used to simulate the effects of heavy urea and surface-covered tea leaves on soil acidification. The results showed that the deciduous leaves of both urea and tea tree could acidify the soil, especially the surface layer of 0 ~ 20 cm was the most obvious. The acidification of red soil and yellow soil was more obvious than that of red soil and yellow brown soil. The paper also discussed the acidification effect, acidification process and acidification difference of different soil types of urea and tea tree deciduous soil.