What is the difference to a chelate?
A chelate is an organic protein, which is similar to a ‘claw’. In this chelate, the orto-orto concentration is used to indicate by how many ‘arms’ the molecule is held.
As soon as the chelate has arrived in the root environment, the molecules are released. This because the chelate ‘falls apart’. After this has happened, all molecules are fully used. Besides this, chelates are only able to bind elements that are positively charged, such as iron, copper, zinc and manganese. Salts cannot be bound to chelates.
A polyphosphate is a connection of phosphate, that complexes molecules. Polyphosphates are able to release the molecules collected, without losing its own structure. This is very different to chelates that need to fall apart in order to release molecules. Because the polyphosphate’s structure remains throughout the process, more molecules can be bound. Molecules, salts and minerals can be bound to polyphosphates, which is called complexing.
Another difference between chelates and polyphosphates can be found in the extra advantage that polyphosphates bring along.