Abstract

Accumulation and Translocation of Macro, Micronutrient, Non-essential and Toxic Elements by Swiss Chards (Beta Vulgaris Subspecies Cycla) Grown up in an Open-air Plot Under Organic or Conventional Farming Techniques

Olaia Liñero Campo, PhD, University Of The Basque Country (Upv/Ehu)

Two open-air plots were implemented to investigate the influence of the fertiliser (organic vs. conventional) on the accumulation of several elements (Na, Mg, K, Ca, Mn, Fe, Co, Ni, Cu, Zn, Se, Mo, Sn, Sb, Sr, Ag, Ba, W, Al, Ti, V, Cr, As, Cd, Hg, Tl and Pb) by chards and their further translocation to aboveground during their vegetative growth. The elements concentrations were measured in all plant parts collected in triplicate for six samplings. Statistic and chemometric analysis of data showed that Fe, Co and toxic elements were mainly immobilised in roots, whereas macro and micronutrients were translocated to aboveground, together with Sr, Ba and Cd. The elemental composition of chards decreased with time, likely because of a reduction in the bioavailability and/or of the root absorption. The use of organic fertiliser enhances the nutrient value of edible parts while conventional increased the risk by Cd accumulation.