| 摘要: |
| 【目的】探讨温度和水势对扁茎黄芪种子萌发的影响，明确温度、水势与种子萌发之间的关系，为扁茎黄芪规范化栽培提供理论依据。【方法】以陕西省大荔县扁茎黄芪种子为材料，在不同温度(5，10，15，20，25，35 ℃)和水势(0，-0.2，-0.4，-0.6，-0.8 MPa)下进行萌发试验，利用多元回归方法建立积温模型与水势模型，分析温度和水势对扁茎黄芪种子萌发的影响。【结果】在20 ℃时，扁茎黄芪种子萌发率达最大(94.00%)，萌发速率略低于25 ℃，但二者无显著差异；在0 MPa时，种子萌发率达最大(92.74%)，萌发率和萌发速率均随水势减小而降低。种子萌发的基础温度Tb为7.97 ℃，种子累计萌发率达50%时的积温θT(50)为358.88 ℃·h；种子萌发的基础水势ψb(50)为-0.655 8 MPa，种子累计萌发率达50%时的水势积累值θH(50)为20.15 MPa·h。【结论】温度和水势对扁茎黄芪种子萌发有不同程度影响，其萌发的最适温度与水势分别为20 ℃与0 MPa，可根据种子温度和水势需求规律预测萌发时间来安排生产，提升扁茎黄芪栽培规范化水平。 |
| 关键词: 扁茎黄芪；种子萌发；积温模型；水势模型 中药材栽培 |
| DOI：10.13207/j.jnwafu.2026.02.017 |
| 分类号: |
| 基金项目:陕西省重点研发计划项目(2021SF 384)；西北农林科技大学科技创新专项(2452021090)；杨陵区区校一体开展农村人才振兴项目(TG20220068)；西北农林科技大学校企合作项目(TG20221121) |
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| Effects of temperature and water potential on seed germination of Astragalus complanatus |
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LUO Qingqing, DONG Huan, CAO Wei, GUO Kangya, GUO Yuan, DUAN Qimei
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College of Chemistry and Pharmacy,Northwest A&F University,Yangling,Shaanxi 712100,China
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| Abstract: |
| 【Objective】This study aims to investigate the effects of temperature and water potential on seed germination of Astragalus complanatus,in order to provide a theoretical basis and technical guidance for the standardized cultivation of A.complanatus.【Method】A.complanatus seeds from Dali County,Shaanxi Province were used as materials,and seed germination was tested under different temperatures (5,10,15,20,25,and 35 ℃) and different water potentials (0,-0.2,-0.4,-0.6,and -0.8 MPa).Multiple regression analysis was used to establish the thermal model and water potential model,which were used to evaluate the effects of temperature and water potential on seed germination of A.complanatus.【Result】At 20 ℃,the germination rate reached the maximum (94.00%) and the germination speed was slightly lower than that at 25 ℃,but there was no significant difference.The germination rate reached a maximum of 92.74% at 0 MPa,and both germination rate and germination speed were decreased with the decrease of water potential.The basal temperature for seed germination was 7.97 ℃,and the accumulated temperature θT(50) was 358.88 ℃·h when the seed germination rate reached 50%.The basic water potential for seed germination was -0.655 8 MPa,and the water potential accumulation value θH(50) was 20.15 MPa·h when the seed germination rate reached 50%.【Conclusion】The seed germination of A.complanatus was affected by temperature and water potential,and the optimal temperature and water potential were 20 ℃ and 0 MPa,respectively.Based on the requirement of temperature and water potential of A.complanatus,the seed germination time could be predicted and its production could be arranged to improve the standardization level of its cultivation. |
| Key words: Astragalus complanatus R.Br. seed germination thermal model water potential model cultivation of Chinese medicinal herbs |
