A STUDY ON BACTERIA POPULATION DYNAMICS IN CULTURAL PERIOD AND FISH PRODUCTIVITY IN TUERJISHAN RESERVOIR
森林生态系统根系生物量研究进展

The effects of roots on biogeochemical processes have been insufficiently recognized.Only few ecologists have paid their attention to the root systems partially because the methods that are currently available are problematic and our knowledge on the role of root systems are very limited.To strengthen the research on the root systems in forested ecosystems,in China we introduced several methods to measure the (fine) root biomass,turnover and productivity.Using harvest,soil coring,ingrowth soil core,nitrogen budget,root observation laboratory,soil respiration,soil monolith,indirect measurement or minirhizotron methods,the(fine)root biomass,turnover and productivity could be properly measured.We suggested that the use of soil-coring technique,ingrowth soil core,soil respiration and the minirhizotron methods should be emphasized.