Study on suitable temperature for seed germination of Poa annua
[Objective]The investigation was performed to find the suitable temperature for seed germination of Poa annua.[Method]The germplasm of wild annual Poa pratensisfrom 16 different areas in Gansu province was used as materials in this experiment.Eight different temperature gradient treatments were set at 4,8,12,16,20,24,28 and 32℃.The effects of different temperature on seed germination of annual Poa pratensis were studied.[Result]The results showed that with the increase of temperature,the germination percentage,germination potential,germina-tion index,radicle length,seedling fresh weight and vitality index of annual Poa pratensis seeds increased firstly and then decreased,while the plumule length increased gradually.[Conclusion]The comprehensive evaluation of mem-bership function showed that the optimal temperature range for seed germination was 16～24℃under the condition of 16 h illumination/8 h darkness and 55%relative humidity,and the optimum germination temperature was 24℃.
万方数据
维普
