If the aim is to use the low P method for growth regulation and/or to improve the keeping quality, the following instructions should be followed:
Mix a COMPALOX® P buffer desorbing low P into the growth
substrate. If a
full-fertilized peat is used it should be modified so that the COMPALOX®
P
buffer is the only source of P fertilizer in the growth medium. If the production time is
relatively short it may be sufficient to mix only 1% (volume) COMPALOX®
P
buffer into the growth substrate, whereas 2% is recommended for species with a longer production time.
The standard nutrient recipe should be changed and no P needs to be added with the fertilization
if the production time is relatively short or when used in the production of plant
species with a naturally low P requirement. To avoid the COMPALOX® P buffer being
depleted before the end of the production of species with a long production time we recommend the
growers to maintain the COMPALOX® P buffer by adding 50-80 µM P depending on species with
the irrigation water.
If you have any questions, please contact:
Danish Institute of Agricultural Science
Kirstinebjergvej 10
DK - 5792 Aarslev
Dr. Conny Wang Hansen
Phone: +45 (0) 63 904-212
Fax: +45 (0) 63 904-390
