| Cite this article: | 晏军,顾闽峰.盐土条件下不同品系藜麦生理特性和产量指标对花期渍水胁迫的响应[J].灌溉排水学报,0,():-. |
| YAN Jun,Gu Min-feng.盐土条件下不同品系藜麦生理特性和产量指标对花期渍水胁迫的响应[J].灌溉排水学报,0,():-. |
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| Response of Physiological Characteristics and Yield of Different Quinoa Strains to Waterlogging Stress at Flower Stage under Saline-soil Conditions |
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YAN Jun, Gu Min-feng
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Xinyang Experimental Station of Jiangsu Institute of Agricultural Sciences in Coastal Areas
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| Abstract: |
| 【Objective】Quinoa has the characteristics of high nutritional value, wide adaptability and strong stress tolerance, etc. It is of great significance to explore the response mechanism of quinoa under waterlogging stress at anthesis for the introduction, selection and popularization of quinoa in the coastal beach area.【Method】Based on 4 quinoa strains(SL21, SL44, SL24, SL45), pot experiments were carried out to study the response of physiological characteristics and yield components of quinoa at anthesis to waterlogging duration(4, 8, 12 d) in saline soil environment, and the drainage indexes were determined.【Result】The results showed that the MDA content of quinoa leaves increased, and the contents of Chl (a + b), SP, SS, photosynthetic parameters (Pn, Tr, Gs, Ci) and chlorophyll fluorescence parameters (Fv/Fo, Fv/Fm) decreased with the increase of waterlogging time. After waterlogging for 4 days, the MDA content of four strains was significantly higher than CK, the Chl (a + b) and SP content of SL44 were not significantly lower than CK, but the Chl (a + b) and SS content of SL21 and SL24 were significantly lower than CK, except for SL44, the Tr of other three strains were significantly reduced, but Fv/Fo nd Fv/Fm of four strains were not significantly affected. After waterlogging for 12 days, the physiological indexes of four lines were significantly lower than CK, and the physiological metabolism of quinoa was seriously damaged. In terms of yield composition, the main spike yield of each plant accounted for more than 65% of the total yield, and the total yield of each plant of four strains decreased significantly after 4 days of waterlogging, the total yield of each plant was SL 44 > SL 21 > SL 24 > SL 45, and the main spike yield and 1000 grain quality were significantly lower than CK after 8 days of waterlogging. After 12 days of waterlogging, the branch yield was cut off.【Conclusion】To sum up, the key to planting quinoa in coastal areas is to select farmland with relatively high terrain and good drainage conditions, SL 44 was relatively good resistance to waterlogging damage, if the quinoa yield reduction of 15% to 20% as a drainage control standard, the allowed time of waterlogging at anthesis is 3.2 ~ 4.1 days. |
| Key words: Quinoa; Waterlogging; Physiological characteristics; Yield; Drainage index |
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