不同灌溉模式下草莓对水分胁迫的生理响应研究

高凡; 郑然; 董少康; 李玉中; 郭家选; 沈元月; 李兴亮

引用本文:	高凡,郑然,董少康,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,0,():-.
	Gaofan,郑然,Dong Shaokang,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,0,():-.

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不同灌溉模式下草莓对水分胁迫的生理响应研究
高凡,郑然,董少康,等
1.农业农村部华北都市农业重点实验室/北京农学院资源与环境系北京;2.中国农业科学院农业环境与可持续发展研究所;3.北京林果业生态环境功能提升协同创新中心北京

摘要:

【目的】本文以草莓“红颜”为试验材料，研究了不同灌溉模式下草莓对水分胁迫的生理响应。【方法】采用了充分灌溉（FI，CK）、分根灌溉（PRI）和亏缺灌溉（DI）三种灌溉模式，其中PRI和DI模式下各设置轻度（LS）、中度（MS）和重度（SS）三个水分胁迫水平，共7个试验处理。【结果】DI与PRI两种灌溉模式下，草莓叶片叶绿素a（Chl a）和叶绿素b（Chl b）含量都显著低于FI(CK) 模式，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含量相对较高；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FI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FI（19.0~26.0 %），且在LS和MS水平下显著高于DI； PRI草莓叶片丙二醛（MDA）累积量仅在SS水平下显著高于FI（ 30.2%），而DI草莓叶片MDA累积量在MS和SS水平下显著高于FI，分别为34.3 %和56.3 %。【结论】PRI模式下草莓比DI模式下具有更强的渗透调节能力和耐旱性，且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：

分类号:S274.3；S275.6

基金项目:北京市自然科学基金重点项目(6171001) ；北京市自然科学基金-市教委联合资助项目（KZ202010020028）；国家自然科学基金(31471837)

Physiological Response of Strawberry to Water Stress under Different Irrigation Patterns

Gaofan¹, 郑然¹, Dong Shaokang¹, Li Yuzhong², Guo jiaxuan³, Shen Yuanyue⁴, Li Xingliang⁴

1.Beijing University of Agriculture;2.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences;3.Beijing University of Agriculture;4.Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences

Abstract:

【Objective】Strawberry is among the most widely horticultural plants in northern China. Water stress is one of the major environmental factors influencing crop growth, development and yield processes. Here, we focused on the physiological response of strawberry (cv. Honeoye) to water stress under different irrigation patterns. 【Method】The field trial was a complete randomized design with three drip irrigation treatments: Partial root-zone irrigation (PRI), deficit irrigation (DI) and full irrigation (FI); and the PRI and DI treatments were imposed of light stress (LS), medium stress (MS) and severe stress (SS). 【Result】The chlorophyll a (Chl a) and chlorophyll b (Chl b) of strawberry leaf from PRI and DI treatments were significantly lower than those from FI treatments, and have been declining with the growing intensity of water stress. Compared to DI, chlorophyll of leaf was relatively higher in PRI. With the increase of water stress degree, the transpiration rate of strawberry leaf in DI and PRI decreased by 35.2-44.7% and 21.0-47.0% respectively. However, the net photosynthetic rate exhibited little changes. At MS and SS levels, the WUE of DI and PRI was significantly higher than that of FI, with 101.8-117.9% and 68.8-149.8% respectively. The proline (Pro) accumulation of strawberry leaf in PRI was considerably higher than that in FI (19.0~26.0%) at different water stress levels, and which was also obviously higher than that in DI at both LS and MS levels. Furthermore, only at SS level, the strawberry leaf in PRI accumulated much more malondialdehyde (MDA) than that in FI (30.2%), while at both MS and SS levels, the MDA accumulation of strawberry leaf in DI was remarkably higher than that in FI, which were 34.3% and 56.3%, respectively. 【Conclusion】Therefore, the osmotic adjustment ability and the drought resistance ability of strawberry in PRI were much stronger than those in DI, and PRI-MS was considered to be a better water-saving irrigation strategy for strawberries.

Key words: Strawberry; Water stress; Partial root-zone irrigation; Deficit irrigation; Physiological response