Age Structure and Dynamic Analysis of Quercus chungii Population in Huangchulin National Nature Reserve

Taking the population of Quercus chungii in Huangchulin National Nature Reserve as the research object from February to June 2023.Through the investigation of the natural population of Q.chungii with DBH≥5 cm in a 6 hm² plot in the Nature Reserve.using "space replaces time",The static life table of Q.chungii population was compiled,and thus the dynamic change of the population number was analyzed.The results showed that:the number of middle-aged individuals of Q.chungii population was the largest,while the number of small-aged,mature and old-aged trees were relatively smaller.The diameter class structure of the population was ″spindle″,the age structure of Q.chungii population in Huangchulin Nature Reserve belongs to the recession type.The death peak of the Q.chungii population appeared in the V age class(25 cm≤DBH≤30 cm),with a mortality rate of 0.7555.The lack of young individuals was one of the main reasons for the decline of Q.chungii population.Therefore,in order to support the expansion of Q.chungii population,it is very important to adopt some validmeasures,for example,including technical regulation for reintroduction of Q.chungii,and strengthen the management of Huangchulin Nature Reserve.