Study On Seed Germination Characteristics Of Desert Viviparous Shrub In Western Ordos

This paper has choose seed of Haloxylon ammodendron and Ceratoides latens which belong to Desert Viviparous Shrub as experimental materials in Western Ordos. In order to disclose desert viviparous shrub adaptive capacity in the desert environment, We study on seed germination characteristic under the different temperature,different Buried depth of sand , different Precipitation and seed imbibition process protective enzyme change.The results of this research are as follows:1.Germination rate of Haloxylon ammodendron and Ceratoides latens reached the maximum were 85% and 93% at 25℃and germination time for 1.5h and 12h.2. Germination rate of the viviparous seed reached the maximum under 0cm burial depths. Sand-burying at a depth of 2cm, the seedlings can not be excavated.3. The Growth index of Haloxylon ammodendron reached the maximum with rainfall about 40mm and the growth index of Ceratoides latens reached the maximum with rainfall about 60mm.4. Absorbing water speed of the seed of Haloxylon ammodendron reached the maximum at 5 miutes ,but absorbing water speed of the seed of Ceratoides latens reached the maximum at 120 miutes.5. The seed of Haloxylon ammodendron the activity of superoxide dismutase(SOD) reached the maximum and the activity of catalase(CAT)reached the Minimum with absorbing water about 5minutes.The seed of Ceratoides latens the activity of superoxide dismutase(SOD) and the activity of catalase(CAT)reached the maximum with absorbing water about 120minutes. Their activityof peroxidase(POD) No significant difference between different imbibition process.The result of this research to supply reproduction manner of desert shrub in Western Ordos, as well as information on existing viviparous plants to supplement.