Joint International Conference on Long-term Experiments ...

Table 2: Effect of fertilization and liming on the soil chemical characteristics in 2006,
in the 44 th year of the trial. Ploughed layer.
Treatment
code
pH
(H2O)
pH
(KCl)
Hydrolytic
acidity,y1
Humus
%
NH4-acetate+EDTA
soluble
P2O5 mg/kg K2O mg/kg
Control 5.4 4.3 7.6 0.6 92 67
N1 5.0 4.2 9.6 0.8 85 43
N2 4.7 3.6 12.6 0.8 105 41
N3 4.6 3.5 13.6 0.7 89 44
N2P1 4.9 3.8 10.6 0.8 135 43
N2P2 4.6 3.9 11.6 0.9 158 50
N2P3 4.7 3.9 11.6 0.8 191 41
N2K1 4.7 3.7 11.4 0.8 101 56
N2K2 4.9 3.8 10.4 0.7 92 78
N2K3 4.8 3.7 11.1 0.8 99 73
N2P2K2 4.8 3.8 11.6 0.8 163 67
N2P2K2Ca3 6.8 6.4 3.6 0.7 225 62
N2P2K2Mg2 6.3 6.0 4.8 0.8 198 69
N2P2K2Ca2Mg2 6.7 6.2 3.8 0.7 220 65
LSD5% 0.3 0.5 2.1 0.3 41 12
Mean 5.2 4.3 9.5 0.8 139 57
Table 3 gives an overview about the effect of some treatments on soil chemical
properties in the topsoil as a function of pH and the total grain yields of triticale during
the last two 4-years periods. The close positive correlations among the pH (H2O), pH
(KCl) and hydrolytic acidity values are unambiguous. The exchangeable cations Al 3+
and Fe 2+ dropped down with increasing pH, while Ca 2+ and Mg 2+ ions lifting up when
Ca or Mg was applied. Exchangeable cations expressed in % the S-value (sum of bases)
show relative relationships among these elements.
On the leached and very acid soil Ca 2+ amounted altogether to 32%, while on the limed
one to 88%. In case of Mg 2+ , the N3 plot soil had 8%, while the fertilized with dolomite
one 22% relative weight. The K + made out 22% in the very acid soil, while 6% in the
limed soil. Considering the adsorption characteristics, one can state that the cation
exchange capacity shows increasing trend. The sum of bases and the % of base
saturation enhanced 5-6 times in the limed soils compared to that of the N3 plot (Table
3).
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