摘要
以吐鲁番梭梭[Haloxylon ammodendron(C.A.Mey.)Bunge]树体上的成熟种子为材料,研究贮藏时间、贮藏温度和贮藏种子含水量对梭梭种子萌发活力的影响。结果表明,室温和冰箱贮藏种子9个月,种子发芽率随着贮藏时间的延长呈下降趋势,下降幅度达46.50和35.50个百分点,各时期冰箱贮藏种子发芽率的下降幅度低于常温贮藏。不同温度下贮藏梭梭种子3个月的发芽率、发芽势、发芽指数和胚鲜重特征为-10℃>-18℃>-4℃>4℃>常温,且随着贮藏温度的降低呈先升高后降低,差异显著。不同梭梭种子含水量贮藏3个月的发芽率、发芽指数、胚根长和活力指数随着种子含水量的降低呈先升高后降低趋势,种子含水量为5.50%的降低幅度最小。贮藏温度与活力指数间呈极显著负相关,贮藏种子含水量与发芽指数和活力指数间呈极显著负相关,种子发芽率、活力指数与不同贮藏条件间的相关性高低顺序均为贮藏种子含水量>贮藏温度>贮藏时间,而发芽势、发芽指数与不同贮藏条件间的相关性高低顺序均为贮藏温度>贮藏种子含水量>贮藏时间。
The mature Haloxylon ammodendron(C.A.Mey.)Bunge seeds in Turpan were used as experimental materials,to study the effects of storage time,temperature and seed moisture content on the germination vigor of H.ammodendron(C.A.Mey.)Bunge seeds.The results showed that,under the storage mode of room temperature and refrigeratort for nine months,with the extension of storage time,the seed germination percentage showed a decrease trend,and the rate of decline were 46.50 and 35.50 percentage point.The reduction of germination percentage of storage seeds in refrigerator was lower than room temperature in various periods.Under different storage temperatures for three months,the characteristics of germination percentage,germination potential,germination index and fresh weight of embryo were-10℃>-18℃>-4℃>4℃>room temperature.With the storage temperature was decreased,the trend was increased first,then decreased significantly.Under different seed moisture content stored three months,the characteristics of germination percentages,germination index,root length and vigor index of seeds were as follows,with the seed moisture content was decreased,the trend was increased first,then decreased,and the reduction was lowest under the storage conditions of seed moisture content of 5.50%.There were extremely significant negative?correlation between storage temperature and vigor index,between storage seed moisture content and germination index,vigor index,respectively.The order of correlation coefficient between seed germination percentages,vigor index and different storage conditions was moisture content>storage temperature>storage time,however,the order of correlation coefficient between seed germination potential,vigor index and different storage conditions was storage temperature>moisture content>storage time.
作者
王泽
任财
梁燕
颜安
麻浩
罗艳丽
粟玲
WANG Ze;REN Cai;LIANG Yan;YAN An;MA Hao;LUO Yan-li;SU Ling(College of Pratacultural and Environmental Sciences/Xinjiang Key Laboratory of Soil and Plant Ecological Processes,Xinjiang Agricultural University,Urumqi 830052,China;Forestry Workstation of Management General Station in Xinjiang Production and Construction Corps,Urumqi 830013,China)
出处
《湖北农业科学》
2020年第8期121-125,共5页
Hubei Agricultural Sciences
基金
国家自然科学基金项目(31800384)
新疆自治区区域协同创新专项(科技援疆计划)(2017E0237)
“荒漠生态恢复与重建”协同创新中心联合资助项目。
