THE MAIN VEGETATION TYPES AND THEIR VERTICAL DISTRIBUTIONS OF JINGANGTAI MOUNTAINOUS REGION IN HENAN

The Jingangtai mountainous region is on the south fringe of Henan, situated at 31°42′─31°45′N, 115°29′─115°38′E.Based On our preliminary studies,some results are summarized as follows:1.There are 105 families, 349 genera and 556 species of seed plants,and the floristic elements are complex and interlaced, with obvious vertical replacement phenomenon as well as the majority of temperate elements and a lot of tropical elements. 2.The life forms are according to Raunkier’s classification : phaenerophyte (39.6%),chamaephyte(10.0%), hemicryptophyte(31.4%),geophyte(12.0%)and therophyte(7.0%).3. The main vegetation types are divided into 5 vegetation types, 5 subvegetation types and 39 formations. 4. The vertical belts of vegetation are :(1)the deciduous and evergreen broadleaved mixied forest and deciduous broad-leaved forest complex zone at alt. 200─260m,(2)the deciduous broad-leaved forest zone at alt. 600─1500m, which includes the middle mountainous deciduous broad-leaved forest subzone at alt. 600─1300m,and the high mountainous short forest subzone at alt. 1300─1500, and(3)the shrub and meadow zone at alt.over 1500m.