Abstract:This study was conducted from May 1999 to February 2000 in a long term revegetation experiment established in 1989 in Yujiang County (28°15′30″N, 116°55′30″E ), Jiangxi Province, China. The tested area, characterized by a warm wet spring and a hot dry summer, is a typical subtropical monsoon region with annual temperature of 17 8℃, and precipitation and evaporation of 1700mm and 1359mm, respectively. The soil type in the experimental station is red soil (Ultisol) derived from Quaternary red clay. Soil n...