Use of Lignosulfonates as Fe-Chelates for the Growth of Butterhead Lettuce in Nutrient Film Technique (Nft)

Use of the stable isotope 57 Fe to track the efficacy of the foliar application of lignosulfonate/Fe3+ complexes to correct Fe deficiencies in cucumber plants

“…They also have some wettability, adsorptivity and dispersibility5 properties, which may promote their surface adsorption. The micronutrient deficiencies correction with metal–LS complexes has been tested by several authors, concluding that LS could provide Zn and Fe to plants grown in hydroponics 6, 7. However, their behaviour in soil conditions is still under study.…”

Evaluation of 59Fe-lignosulfonates complexes as Fe-sources for plants

“…It was observed that LS/Zn 2+ complexes behave efficiently providing Zn to maize and wheat plants when applied to calcareous soils or to the nutrient solution (Rico et al 1996;Martín-Ortiz et al 2009). Comparison of LS and HEDTA (N-(hydroxyethyl)-ethylenediaminetriacetic acid) as Fe suppliers when applied to butterhead lettuce grown in hydroponics revealed that LS were almost as efficient as HEDTA in keeping Fe in solution and providing Fe for plant uptake (Demeyer et al 2001). …”