By inoculation with Cynomorium songaricum to seedling and wild transplant of one or two year-old Nitraria tangutorum,the parasitic and emergency efficiencies of Cynomorium songaricum were studied un- der such treatments as different fertilization ways and different inoculation ways and amounts.Results showed that emergency of Cynomorium songaricum was less after inoculated for two years.The third year after inoculation was the emergency peak period and from then on,its emergency rate decreased significantly.Cumulative parasitic rates for two years of inoculation with Cynomorium songaricum to seedling of Nitraria tangutorum were respectively 9.38%and 25%,which was more than wild transplant parasitic rates of Nitraria tangutorum in natural environment(4.12%and 7.47%).Inoculation efficiency of two year-old seedling of Nitraria tangutorum was better than one year old seedling,whose seeds produced parasitism with host and emerged in the period of 14 months.This finding broke the past idea that producing parasitism and emerging needed 2-4 years at least.Under the consistent condition of fertilization and inoculation amounts,the parasitic and emergency effects of Cynomorium songaricum by cavernous fertilization were better than those by nutrient bed-fertilization.The increase of inoculation amount could improve emergency rate of Cynomorium sonnaricum and its yield per unit area.