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首页> 外文期刊>Communications in Soil Science and Plant Analysis >Effects of Humic Acid on Root Development and Nutrient Uptake of Vicia faba L. (Broad Bean) Seedlings Grown under Aluminum Toxicity
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Effects of Humic Acid on Root Development and Nutrient Uptake of Vicia faba L. (Broad Bean) Seedlings Grown under Aluminum Toxicity

机译：腐殖酸对铝毒胁迫下蚕豆幼苗根系发育和养分吸收的影响

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Interactions of humic acid with development and uptake by seedlings of Vicia faba L., (cv. Eresen 87) grown in conditions of aluminium toxicity have been investigated in pot experiments in a controlled greenhouse environment. The objective of the study was to investigate whether humic acid moderates aluminum toxicity. The seedlings were treated with solutions of aluminum chloride (AlCl3) prepared in Hoagland control nutrient solution (HO) and 50 and100 mu M and humic acid + Hoagland (HA) solutions, respectively. The 50 and100 mu M HA solutions increased root fresh (RFW) and dry (RDW) weights, where the RFW differed significantly from controls (HO) after statistical evaluation by NCSS (NCSS, Kaysville, Utah) with two-sample T-test range at the 5% level. The results of the current experiment suggested that humic acid had suppressed or counteracted the toxic effect of aluminum (Al3+) on both main and lateral root growth. Humic acid seems to block the effect of Al3+ on nutrient uptake, as tested by atomic absorption spectrophotometry (AAS) and flame photometery (FP). Al3+ content in the roots was significantly decreased by 219% in 50-mu M HA and by 49% in 100-mu M HA treatments respectively. Potassium (K+), sodium (Na+), and iron (Fe3+) were recorded as the other elements taken up in the greatest amounts among the tested nutrients, in addition to Al3+. Humic acid increased the contents of Na+, K+, manganese (Mn2+), and zinc (Zn2+) significantly in both concentrations of HA treatment compared to controls. The Fe3+ content in the roots decreased, in both treatments of HA, application by 252% and 32% respectively. The reduction in the former was significant.
机译：腐殖酸与在铝毒性条件下生长的野豌豆（Vicia faba L.，cv。Eresen 87）的幼苗的发育和吸收之间的相互作用已在温室环境受控的盆栽试验中进行了研究。该研究的目的是研究腐殖酸是否能减轻铝的毒性。用分别在Hoagland对照营养液（HO）和50和100μM腐殖酸+ Hoagland（HA）溶液中制备的氯化铝（AlCl3）溶液处理幼苗。 50和100μMM HA溶液增加了根鲜（RFW）和干（RDW）重量，其中NSW（NCSS，Kaysville，犹他州）通过两次样本T检验范围进行统计学评估后，RFW与对照（HO）显着不同。在5％的水平。当前实验的结果表明，腐殖酸抑制或抵消了铝（Al3 +）对主根和侧根生长的毒性作用。如原子吸收分光光度法（AAS）和火焰光度计（FP）所测试，腐殖酸似乎阻止了Al3 +对养分吸收的影响。在50μMHA中，根中的Al3 +含量显着降低了219％，在100μMHA中，根中的Al3 +含量显着降低了49％。除了Al3 +外，还记录了钾（K +），钠（Na +）和铁（Fe3 +）作为被测养分中吸收最多的其他元素。与对照相比，在两种HA处理浓度下，腐殖酸均显着增加了Na +，K +，锰（Mn2 +）和锌（Zn2 +）的含量。在两种HA处理中，根部中的Fe3 +含量均下降了252％和32％。前者的减少幅度很大。

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