| 何淑玲，杨敬军，常毓巍.4个红景天品种对冻害的响应[J].广东农业科学,2013,40(24):74-76 |
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4个红景天品种对冻害的响应 |
| Response of four kinds of Rhodiola to freezing injury |
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| DOI： |
| 中文关键词: 红景天 抗冻性 发芽率 出苗率 |
| 英文关键词: Rhodiola frost resistance germination emergence rate |
| 基金项目:国家星火计划项目(2010GA860031)曰甘肃省教育厅项目(1112B-05)曰甘肃省星火计划项目(0910XCXP053) |
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| 摘要点击次数: 1384 |
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| 中文摘要: |
| 试验采用田间随机区组法，以狭叶红景天、大花红景天、唐古特红景天、长鞭红景天为材料，从冻害后的开始出苗时间、出苗持续时间、出苗率、成活率及酪醇含量的不同来研究4种红景天抗冻性差异。研究结果表明院冻害在出苗前发生时袁狭叶红景天的出苗受影响最大，长鞭红景天最小；幼苗期发生冻害时，狭叶红景天成活率最小、冻害最严重，长鞭红景天成活率最大、冻害最轻、4种红景天抗冻性强弱顺序依次为长鞭红景天>大花红景天>唐古特红景天>狭叶红景天。因此袁长鞭红景天的抗冻性最强，狭叶红景天的抗冻性最弱。 |
| 英文摘要: |
| Taking Rhodiola kirilowii, R. crenulata, R. algida and R. fastigiata growing in Tibetan Plateau as materials,field randomized block design was used to study the frost resistance difference of four kinds of Rhodiola from the differences of start time of germination after freezing, emergence duration, emergence rate, survival rate and tyrosol content.The results showed that, when freezing injury happened before emergence, R. kirilowii suffered worst, while R. fastigiata suffered lightest. When the freezing injury happened in the seedling stage, the survival rate of R. kirilowii was smallest,while the survival rate of . fastigiata was biggest. The order of frost resistance for 4 kinds of Rhodiola was R. fastigiata, R.crenulata, R. algida, R. kirilowii. The results indicated that the frost resistance of R. fastigiata was the strongest, while the frost resistance of R. kirilowii was the weakest. |
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