Effects of different culture substrates on seed germi-nation and seedling growth of Cleistogenes songorica
[Objective]Cleistogenes songorica is a perennial Gramineae grasses known for its stronger drought re-sistance and wide distribution in arid and semi-arid areas.However,due to seed dormancy and the lengthy period from germination to seedling establishment,the emergence rate and survival rate of C.songorica are often insufficient to meet the demands of seed producer.[Method]To address solve this problem,seven commonly available sub-strates(peat,sawdust,fine sand,mushroom residue,vermiculite,perlite,ceramsite)were selected as incubation me-dia for a cultivation experiment with C.songorica in a glasshouse.The physical and chemical properties of each sub-strate were measured along with germination and seedling growth-related indexes[Result]The study found that the germination potential,germination rate,germination index,vigor index and coleoptile length of C.songorica incubated with fine sand,peat,sawdust and vermiculite were superior to other treatments.The germination rate of C.songorica incubated in sawdust,fine sand,peat and vermiculite was significantly higher than that in mushroom residue,with rates 6.4 times,6.3 times,5.9 times and 5.8 times higher,respectively.[Conclusion]A comprehensive evaluation using the membership function method for each medium was conducted,resulting in the following sequence:saw-dust>vermiculite>fine sand>perlite>peat>mushroom residue>ceramide.It is recommended to use a mix-ture of fine sand with peat,sawdust and vermiculite as soilless culture substrate for the establishment of C.songorica and lawn formation.
Cleistogenes songoricaSoilless cultivationincubation substratemembership function methodemergency
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