南亚热带常绿阔叶林生产力研究现状与展望

Studies on Productivity of the Lower Subtropical Evergreen Broad-leaved Forest in China (Review)

南亚热带常绿阔叶林生产力研究现状与展望陈章和（华南师范大学生物系，广州５１０６３１）王伯荪张宏达（中山大学生物系）１研究背景由于资源、能源、环境等问题的日益突出，森林生产力的全球性研究自５０年代以来轰轰烈烈地开展起来。森林生产力的研究成果，对丰富全球...

Results of the researches on biomass,net primary production,and growth characteristics of the trees and saplings etc.in the lower subtropical evergreen broad-leaved forest in China were summaried.Biomass lay in 300～500 t·(hm) -2 ·a -1 for developed forest stands,including leaf biomass 5～15 t·(hm) -2 . Root biomass accounted for c.20% of total biomass,and was obviously related to above-ground biomass.Fine root biomass was found in a range of 1 283～12 02t·(hm) -2 ,and most of the biomass distributed in the upper 20 cm of the soil.Net primay production amounted to 20～30 t·(hm) -2 ·a -1 ,and the utility efficiency of effective radiation to 2 0%～2 5%.Litterfall lay in 5～12 t·(hm) -2 ·a -1 ,and standing crop of litter c.5 t·hm -2 ,Dead tree and tree fall mass were about 3 9～7 1 t·(hm) -2 ·a -1 in the stands studied.Herbivory of leaf lay in 0 2～0 7 t·(hm) -2 ·a -1 ,with heavy herbivory being in rainy season.Annual radial growth of the trees was 0 111～0.518cm,usually 0 2cm,measured with dendrometers,steel tap,and disc analysis,and that of saplings,0.113cm,measured with vernier callipers.Height growth were measured 20～50cm in the trees and 5 132cm in the saplings.