摘要
[目的]探究一年生早熟禾(Poa annua)种子萌发适宜温度.[方法]试验以甘肃省16个不同地区的野生一年生早熟禾种子为材料,设4、8、12、16、20、24、28和32℃8个恒温处理,研究温度对一年生早熟禾种子萌发的影响.[结果]随着温度的升高,一年生早熟禾种子的发芽率、发芽势、发芽指数、胚根长、苗鲜重、活力指数均呈先增后减趋势,胚芽长呈逐渐增大趋势.结论 隶属函数综合评价表明,光照周期为16 h光照/8 h黑暗,相对湿度55%的恒温条件下,野生一年生早熟禾种子适宜萌发温度范围为16～24℃,最适萌发温度为24℃.
Abstract
[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℃.
基金项目
甘肃省林草局草原生态修复治理科技支撑项目(GSLC-2020-3)
甘肃省林草局草原生态修复治理科技支撑项目(LCJ20210021)
甘肃省科技计划项目(20JR10RA564)
国家自然基金项目(31560667)
维普
万方数据