Study On Seed Germination And Seedling Growth Of 4 Stipa Species

Study on the germination of Stipa breviflora, S. grandis,S. krylovii, S. baicalensis and seddling growth,in order to understand Stipa grassland regrowth rule, develping trending and regerminating, and we can more use, protect it. The results showed that:S. Breviflora:15~25℃,20~30℃,paper bed, pelling off the hull;S. grandis15℃,25℃, paper bed, pelling off the hull; S. krylovii 15~25℃,20~30℃, soil bed, pelling off the hull;S. baicalensis30℃,15~25℃, soil bed, pelling off the hull.Albumen and pelling off the hull can accelerate seed germnation.The treatment of alternating temperature was benefit for four seeds. Among of the methods of judging the seed vigor: TTC dying method could easily reflect seed potential vigor; Low temperature Test Accelerated Aging Test, Conductivity , Topographing Tetrazolium Test and Between of Sand could forecast the seed emergence in the field, so they were good measures to examining seed vigor.The optimum TTC dying method condition of four Stipa seeds (seed soaking temperature and time, TTC percentage, dying temperature and time) each other was : 30℃and 6h, 0.3%, 40℃and 3h; 30℃and 3h, 0.1%, 40℃and 6h; 30℃and 6h, 0.3%, 35℃and 18h; 30℃and 12h, 0.3%, 30℃and 18h;The store time of four seeds were about 1a, safe store period was about 1~3 month, S. breviflora was 3 month.The primary vegetation could effect seed germination and seedling growth.