Under natural conditions,the absorption spectra within the 280~330 nm range of UVBabsorbing compounds in leaves of 57 species of subtropical plants can be divided into oneand twopeaks types(Fig.1).The absorbance of UVBabsorbing compounds based on the leaf area among plant species are in the following orders:tree>shrub>herb and sun plant>shade plant(Tab.1).Four dominant forest species Schima superba、Cryptocarya concinna Castanopsis fissa and Pinus massoniana in Dinghushan Biosphere Reserve were g...