STUDIES ON BIOMASS AND PRODUCTION OF THE LOEWR SUBTROPICAL EVERGREEN BROAD-LEAVED FOREST IN HEISHIDING NATURAL RESERVE——310MASS INCREMENT AND NET PRIMARY PRODUCTION Radial growth of Pinus koraiensis and carbon sequastration potential of the old growth forest in Changbai Mountain, Northeast China ANALYSIS ON THE DYNAMIC OF ABOVEGROUND BIOMASS INCREMENT AND TIME SEQUENCE OF DIFFERENT DEYEUXIA ANGUSTIFOLIA POPULATIONS EFFECT OF THINNING FOR CUNNINGHAMIA LANCEOLATA PLANTATIONS IN THE EASTERN DISTRICT OF HUNAN PROVINCE