In soilless culture, metal chelates – particularly iron – have proven to be indispensable. The exceptionally pure chelated micronutrients developed by AkzoNobel are especially suited for this.
In cases where very high concentrations of iron chelates are used in stock solutions containing calcium nitrate, it is advised to use sulfate-free iron chelates. Fe-DTPA types are most commonly used, although Fe-EDDHA or Fe-HBED can also be used, often in high pH circumstances. Chelation of Mn, Zn and Cu increases availability of these elements, but also prevents losses of Fe from the Fe-chelates.
Producers of fertilizers Yara, SQM and AkzoNobel, Laboratory Eurofins Agro, Research Institute NMI and consultant Geerten van der Lugt have published the manual “Nutrient Solutions for Greenhouse Crops”. It describes the conditions for the use and preparation of nutrient solutions in horticulture. It also contains a diversity of nutrient solutions and recipes for fertilizers for various horticultural crops, either grown in soil, organic material or inert substrates.
Download our Manual Nutrient Solutions for Greenhouse Crops
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