干旱胁迫对大豆叶片矿质元素含量和累积量影响

摘要

采用沙培和淋浇PEG6000不同含量的营养液进行干旱胁迫处理方法,研究干旱胁迫对大豆叶片矿质元素含量和累积量的影响。设对照(CK)、轻度胁迫(MIS)、中度胁迫(MOS)和重度胁迫(SES)四个处理,营养液中PEG6000浓度分别为0、5%、10%和15%。结果表明,干旱胁迫对大豆叶片矿质元素含量和累积量有显著影响,干旱使叶片N、P含量降低,K、Cu、Zn含量无明显变化,Ca含量略有提高,Mg、Mn含量显著升高,Fe无明显规律性；干旱条件下大量元素和Fe、Cu累积量均降低,而Zn和Mn累积量保持稳定。%This study was carried out to investigate the effects of drought stress on the concentration and accumulation of macronutrients (N, P, K, Ca, and Mg) and micronutrients (Cu, Zn, Fe, and Mn) in leaves of soybean cultures (Suinong14) by sand culture. A factorial experiment was arranged in a completely randomized design with four replications. Water stress was applied by polyethylene glycol (PEG) 6000 at specified concentrations (W/V) into a nutrient solution. The experimental design consisted of four treatments: control (CK), mild stress (MIS), moderate stress (MOS), and severe stress (SES). Concentrations of PEG-6000 were 0, 5%, 10%, and 15%. The results showed that drought stress significantly impacts mineral nutrient uptake and accumulation. The concentration of N and P decreased, K, Cu, Zn content remained stable, Ca content slightly improved, Mg and Mn content increased significantly. whereas Fe content did not show any clear tendency under water-deficiency stress conditions. The accumulation of mineral macronutrients and Fe, Cu declined, Zn and Mn accumulation hold steady.