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目的:研究干旱胁迫和增强UV-B辐射对金荞麦生物量积累与分配的影响,以期作为金荞麦规范化种植提供科学理论依据。方法:采用盆栽试验的方法,测定金荞麦在不同程度干旱胁迫和UV-B辐射处理下各器官生物量,并计算生物量分配的情况。结果:在充足水分状况下:增强UV-B辐射显著降低了金荞麦各器官生物量积累,降低了金荞麦根生物量配置,提高了金荞麦茎生物量配置。在中度干旱胁迫下,增强的UV-B辐射提高了金荞麦根生物量积累和配置、茎生物量积累。在重度干旱胁迫下,增强的UV-B辐射提高了金荞麦根生物量积累,能使金荞麦茎生物量积累得到一定提高,金荞麦各器官生物量配置对增强UV-B辐射均不甚敏感。结论:增强的UV-B辐射对金荞麦生物量积累和分配的影响因水分状况的差异和器官的差异而不同。总体看来,基本证实了增强UV-B辐射能减轻干旱胁迫对金荞麦生物量积累的影响。
Objective: To study the effects of drought stress and enhanced UV-B radiation on the biomass accumulation and distribution of Fagopyrum tataricum, and to provide a scientific basis for its cultivation. Methods: Pot experiments were conducted to determine the biomass of each part of Fagopyrum Buckwheat under different degrees of drought stress and UV-B radiation treatment, and the biomass allocation was calculated. Results: In the condition of adequate moisture, enhanced UV-B radiation significantly reduced the biomass accumulation of all organs, reduced the biomass allocation of F buck, and increased the stem biomass allocation of F buck. Under moderate drought stress, enhanced UV-B radiation increased the biomass accumulation and allocation of F buckle root, and accumulation of stem biomass. Under severe drought stress, the enhanced UV-B radiation increased the biomass accumulation of F buckle root, which could improve the biomass accumulation of Fritillaria cirrhosa. The biomass allocation of Fm in Buckwheat was not sensitive to enhanced UV-B radiation . Conclusion: The effects of enhanced UV-B radiation on the biomass accumulation and distribution of Fagopyrum Buckwheat differ due to differences in water status and organs. Overall, it is basically confirmed that enhanced UV-B radiation can mitigate the effects of drought stress on the biomass accumulation of Fagopyrum tataricum.