不同温度对西藏沙棘种子萌发的影响  

Effects of Different Temperatures on the Germination of Seabuckthorn(Hippophae thibetana Schlechtend.)Seeds

作　　者：徐迪 方江平 曹宇鹏 关丽雪 王园园[1] XU Di;FANG Jiang-ping;CAO Yu-peng;GUAN Li-xue;WANG Yuan-yuan(Institute of Tibet Plateau Ecology/National Forest Ecosystem Observation & Research Station of Nyingchi Tibet/Key Laboratory of Forest Ecology in Tibet Plateau,Ministry of Education/Key Laboratory of Alpine Vegetation Ecological Security in Tibet,Nyingchi 860000,China)

机构地区：[1]西藏高原生态研究所/西藏林芝高山森林生态系统国家野外科学观测研究站/西藏高原森林生态教育部重点实验室/西藏自治区高寒植被生态安全重点实验室,西藏林芝860000

出　　处：《黑龙江农业科学》2022年第7期82-84,89,共4页Heilongjiang Agricultural Sciences

基　　金：国家重点研发计划课题(2016YFC0502006)。

摘　　要：西藏沙棘是西藏地区重要的防风固沙植物,为促进西藏沙棘种质资源的保护和利用,以西藏林芝地区的西藏沙棘种子为对象,研究不同温度对其种子萌发率的影响。结果表明,西藏沙棘种子在10,15,20和25℃下种子发芽率均高于90%,说明种子具有较宽的萌发温幅。同时,在4个温度处理下种子的萌发势均大于50%,种子在萌发3 d内都达到了萌发高峰期,发芽进程时间均较短,表明西藏沙棘的种子属于“速萌型”。西藏沙棘种子在20℃具有最高活力,25℃处理的种子对温度具有更高的敏感性,种子活力下降更快,温度在20℃以下,种子对温度具有相对较低的敏感性,种子活力下降较慢。在10℃时种子依然具有较高的活力和发芽率,证明了西藏沙棘种子的萌发阶段对青藏高原的高寒环境具有较强的生态适应性。Hippophae thibetana Schlechtend.is an important windbreak and sand-fixing plant in Tibet.In order to promote the protection and utilization of germplasm resources of H.thibetana,this study took the seeds of H.thibetana in Nyingchi,Tibet as the object to study the effects of different temperatures on their seeds germination rate.The results showed that the seeds of seabuckthorn could achieve a germination rate higher than 90%at 10,15,20 and 25℃,and the seeds had a wide germination temperature range.At the same time,the germination potential of the seeds was greater than 50%under the four temperature gradients,the germination peak was reached within 3 days after the initial germination time,and the germination time was short.The seeds of seabuckthorn belonged to the"fast germination type".And the seeds of seabuckthorn had the highest vigor at 20℃.Seabuckthorn seeds had higher sensitivity to temperature,and the seed vigor decreases faster at 25℃.Below 20℃,seabuckthorn seeds had relatively low sensitivity to temperature,and the seed vigor decreases slowly.It still has high seed vigor and germination rate at 10℃,which proved that the germination stage of seabuckthorn seeds has strong ecological adaptability to the alpine environment of the Qinghai-Tibet Plateau.

关 键 词：西藏沙棘 种子萌发 萌发温度 

分 类 号：F32[经济管理—产业经济]