摘要
Unsystematic selection and planting of tree seedlings in road borders, forest regeneration, development of parks and green spaces which are incompatible with the given climate zone, is a kind of interference and violation of ecosystem privacy. Therefore, the stability and persistence of species in the forest protection is important for planners of natural resources. Field station of spreading Dehloran aquifer is one of the major forestations in Ilam province. It aimed of protecting the soil and underground water table feeding in hot dry plains of Mosian, which have been planted with native and non-native species. In the present article 100 trees of each species were planted during the years 1998 and 1999 in the station, such as Ziziphus spina-christi, Prosopis juliflora, Eucalyptus camaldulensis and Acacia sp. They were randomly selected and information about this species measured and recorded annually has been used. Finally the data has been analysis; by comparison test to compare the growth and persistence. Results indicate that despite high average in height growth （85.4 cm/year） and relatively large diameter growth （2.43 cm/year）, non-native species of Eucalyptus are not in good condition in terms of viability （36.2 percent） and freshness. On the contrary, the native species of Ziziphus with relatively low in average height and diameter growth （22.64 and 2.28 cm/year respectively） represent a better index of viability （65.4 percent） and freshness.
