The effect of the kind of Fe chelate on yielding and quality of greenhouse tomato fruits

Abstract

A two-year-greenhouse experiment was designed to investigate the effect of four chelates, differing in percentage of Fe content and the kind of Fe bonding ligand: Fe 8 Forte (EDTA+HEEDTA), Fe 9 Premium (DTPA), Fe 13 Top (EDTA) and Librel Fe DP7 (DTPA), on the yield and fruit quality of the ‘Merkury’ F1 greenhouse tomato cultivar grown in peat substrate. Each of the tested fertilisers was applied in three different doses in order to reach the level of 50, 75 or 100 mg available Fe per 1 dm-3 of growing medium. In the control treatment the amount of this nutrient was equal to 17.9 mg dm-3. The tomato was cultivated from transplants on benches in the period from the beginning of April to the end of July.

Keywords

• early yield
• fruit composition
• iron fertilisation
• marketable yield