| 引用本文: | 高 凡,郑 然,郭家选,等.不同灌溉模式下草莓对水分胁迫的生理响应研究[J].灌溉排水学报,2021,(1):1-6. |
| GAO Fan,ZHENG Ran,GUO Jiaxuan,et al.不同灌溉模式下草莓对水分胁迫的生理响应研究[J].灌溉排水学报,2021,(1):1-6. |
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| 摘要: |
| 【目的】探究不同灌溉模式下草莓对水分胁迫的生理响应，确定草莓节水灌溉适宜模式。【方法】采用3种灌溉模式：充分灌溉（FI，CK）、分根灌溉（PRI）和亏缺灌溉（DI），PRI和DI模式下设置3个水分胁迫水平：轻度（LS）、中度（MS）和重度（SS），研究了不同灌溉模式下水分胁迫对草莓叶片叶绿素量、光合与蒸腾速率、渗透调节物质和丙二醛（MDA）量的影响。【结果】DI与PRI灌溉模式下，草莓叶片叶绿素a（Chl a）和叶绿素b（Chl b）量都显著低于CK，且随着基质水分胁迫程度的加剧而呈下降趋势；与DI模式相比，PRI模式下草莓叶片叶绿素量相对较高；随着水分胁迫程度的增强，DI和PRI草莓叶片蒸腾速率下降幅度明显，分别为35.2%~44.7%和21.0%~47.0%，而净光合速率变化不明显；MS和SS水平下DI和PRI的水分利用效率（WUE）分别较CK高101.8%~117.9%和68.8%~149.8%；不同水分胁迫水平下，PRI草莓叶片脯氨酸（PRO）累积量显著高于CK（19.0%~26.0%），且在LS和MS水平下显著高于DI；PRI草莓叶片MDA累积量仅在SS水平下显著高于CK（30.2%），而DI草莓叶片MDA累积量在MS和SS水平下显著高于CK，分别为34.4%和56.4%。【结论】PRI模式草莓比DI模式具有更强的渗透调节能力和耐旱性，PRI-MS组合为草莓节水灌溉适宜模式。 |
| 关键词: 草莓；水分胁迫；分根灌溉；亏缺灌溉；生理响应 |
| DOI：10.13522/j.cnki.ggps.2020014 |
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| Physiological Response of Strawberry to Water Stress under Different Deficit Irrigations |
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GAO Fan, ZHENG Ran, GUO Jiaxuan, LI Yuzhong, DONG Shaokang, SHEN Yuanyue, LI Xingliang
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1. Key Laboratory for Northern Urban Agriculture of Ministry of Agriculture and Rural Affairs/Department of Resources and Environment, Beijing University of Agriculture, Beijing 102206, China; 2. Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees, Beijing 102206, China; 3. Institute of Environment andSustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China;4. Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
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| Abstract: |
| 【Background】Strawberry is a cash crop, more than 40% of which is produced in China by facility cultivation. Since strawberry is a shallow-root crop characterized by large leaves and high water-demanding, its growth is sensitive to water deficit. Given that climate change is likely to make water shortage in agricultural production in China worsen, improving agronomic practices to increase water use efficiency is critical to sustaining agricultural production in China and worldwide.【Objective】 The objective of this paper is to investigate the response of physiological traits of strawberry (cv. Honeoye) to water stress under different deficit irrigations.【Method】Field experiment designed using complete randomized block method was conducted consisting of three drip deficit irrigations: Partial root-zone irrigation (PRI), deficit irrigation (DI) and sufficient irrigation (FI). Three water stress levels were further set in PRI and DI modes: minor water stress (LS), moderate water stress (MS) and severe water stress (SS). In each treatment, we measured chlorophyll content in the leaves, as well as the transpiration and photosynthetic rate.【Result】Compared to FI, PRI and DI reduced the contents of both chlorophyll a and b. In all treatments, both chlorophyll a and b decreased as the water stress severity increased. It was found that chlorophyll in PFI was higher than that in DI. With the increase in water stress, DI and PRI reduced transpiration by 35.2%~44.7% and 21.0%~47.0% respectively, compared to FI, although the net photosynthetic rates in them were comparable. Under moderate and severe water stress, the WUE of DI and PRI increased by 101.8%~117.9% and 68.8%~149.8% over FI, respectively. The proline accumulation in PRI was significantly higher than that in FI, varying from 19.0% to 26.0% with water stress, and it was also higher than that in DI when water stress was in minor and moderate level. Compared to FI, PRI increased malondialdehyde (MDA) accumulation by 30.2% at severe water stress, while DI increased MDA accumulation by 34.3% and 56.3%, respectively, under moderate and severe water stress. 【Conclusion】The osmotic adjustment and drought resistance of the strawberry in PRI were stronger than those in DI, and PRI+MS treatment was the most efficient irrigation strategy for strawberry production for the area we studied. |
| Key words: strawberry; water stress; partial root-zone irrigation; deficit irrigation; physiological response |
