Against an excess of ammonium …
Many greenhouse vegetables in press pots, but especially grafted cucumbers, occasionally show severe chlorosis of leaf edges, reduced root growth and general growth inhibition when organic fertilisers are applied in the initial cultivation period. The probable main reason is an excessive ammonium supply to the young plants which occurs particularly in spring when air temperatures rise faster than soil temperatures.
This is a well-known problem with organic fertilisation in organic growing. If mineralisation is reduced, the organic nitrogen in the substrate cannot be converted quickly enough into nitrate. The ammonium-nitrate ratio becomes unfavourable for the young plant, symptoms caused by ammonium excess are the consequence.
… only a plus of ideas can help
New Bio Potgrond innovation for cucumber young plants in press pots
Klasmann-Deilmann has solved this problem with a new development in the Bio Potgrond range. The use of our GreenFibre® wood fibre and our innovative fermented wood fibre TerrAktiv® FT in Bio Potgrond H changes the substrate structure in
the press pot in favour of an improved oxygen supply to the root zone. Even under unfavourable climatic conditions the mineralisation in Bio Potgrond H is secured. The young plant has sufficient nitrate from the organic fertilisers available.
It was already good, now it is even better
In comparison: Nutrient content in substrate, 3 weeks after start of cultivation. The nitrate content in the new Bio Potgrond H is significantly improved (dark green columns).
70% alternative constituents – 100% reliability
The new Bio Potgrond H also allows a peat reduction of up to 70 % for blocking substrates. By adding a special stabiliser, the press pots remain sufficiently stable up to an edge length of 10 cm what makes them suitable for mechanical planting. Extensive practical trials have proven the effectiveness of this innovative new substrate with significantly better coloured, vigorous young plants.
With liquid fertilisation also a fixed size with tomatoes, peppers and others
Besides grafted cucumbers, the plant quality can be improved in tomatoes, peppers, aubergines and other greenhouse plants, both as grafted or seed grown young plants. To ensure a good nitrogen supply during the growing period, liquid fertilisation should be applied to crops in Bio Potgrond H.
Advantages of the new Bio Potgrond H at a glance:
Independent certificates and regulations are the standard
The Bio Potgrond range of substrates for organic growing from Klasmann-Deilmann complies with Regulation (EC) No 834/2007 and its detailed rules for implementation (EC) No 889/2008, appendix I, approved by Ecocert®. All raw materials and organic fertilisers are „GMO-free” and regularly tested for residues. Moreover, Klasmann-Deilmann is RHP certified (www.rhp.nl).
