Comparing with the affinity and widespread species Adenophora potaninii population,the standard life table,survivorship
curves of whole population,as well as the life tables,the survivorship curves of 4 populations of
Adenophora lobophylla at altitude 2300～2400m,2700～2900m,2900～3100m,3100～3400m have been compiled.According to their life cycles,some important parameters such as the number of survivor ( l x ),the number of death ( d x ),the rate of death ( q x )at specific age,etc.have been discussed.The survivorship curvcs of A.lobophylla population pertained to “Deevey C” shape.The period of the highest death rate of A.lobophylla was in 1～5 years old,and the oldest individual was 25 years old.While A.potaninii population was rather different:the peak period of death rate was in 1～3 years old,and the age of the oldest individual was 21 years old.The ability to adapt the unfavorable condition was assumed to be weaker than that of A.potaninii population.The principal factors that led the young seedling of A.lobophylla population to die were imputed to the serious drought during 1～2 years old and the deficiency of solar light in the communities during 3～5 years old as well as in weaker intrinsic resistance to unfavorable
environmental conditions.As the altitudc increases from 2300 to 3400m,the life spans of different A.lobophylla populations showed the pattern:shorter longer shorter responding to the harsh favorable harsh environmental condition.Under the harsh environmental conditions the life span of A.lobophylla population was shorter.