森林生态系统根系生物量研究进展

在森林生态系统功能过程研究中，特别是在生产力和生物地化学循环方面，根系的作用不容忽视，但是，由于研究方法和研究者的观念等方面的限制，对于根系的研究还远不及地上部分受到重视。而关于细根生物量，周转率和生产力等方面的是很少有人问津。为推动我国根系生物学研究的发展，本一面地介绍了９种典型的测度细根生物量的方法。包括：收获法、钻土芯法、内生长土芯法、平衡法、根观测实验室法、土壤碳平衡法、挖土块法、间接法和

A STUDY ON BACTERIA POPULATION DYNAMICS IN CULTURAL PERIOD AND FISH PRODUCTIVITY IN TUERJISHAN RESERVOIR

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.