The greenhouse medium for the rooting of plant cuttings
was a mixture of highmoor peat and perlite in the
volume ratio 1:1 enriched with 25% (v/v) pig slurry compost.
A highmoor peat, pH 4.0, contained 52% of C,
0.2% N and 90% organic matter. Peat reaction was adjusted
to pH of 6.5 by the addition of 4 g CaCO3 per dm3
of peat. Pig slurry compost contained in mg per dm3: 553
N-NO3, 39 N-NH4, 500 P, 1990 K, 630 Ca 653 Mg and
359 Cl; the salinity of compost amounted 3.54 g KCl per
dm3. As control medium a mixture of a highmoor peat
(pH 6.5) and perlite (1:1 v/v) without compost addition
was used