Amsterdam Schiphol Airport has reported a 2 per cent rise in cargo traffic between January and September, compared with the same period of last year.
The airport now expects cargo traffic to grow just 3 per cent this year, down from an earlier forecast of 6 per cent.
'Air cargo volume rose only by 2 per cent due to the fact that during the summer period there were not enough slots available to accommodate new cargo operations' full freighters,' a Schiphol spokesman said.
In the third quarter, cargo volume fell 1.4 per cent year-on-year.
The implementation of slot co-ordination, coupled with a maximum number of movements per year, was adversely affecting traffic growth, Schiphol officials said.
Growth in aircraft movements, passengers and cargo transport was influenced by the airport's adoption this year of a fully co-ordinated system, officials said.