Joint International Conference on Long-term Experiments ...

In 20-40 cm layer there is a definite differentiation (formed in the upper layer) caused
by the treatments, the difference in the upper layer decreases according to liming.
Finally in 40-60 cm soil layer beside the strong differentiation AL-Ca values of each
treatments are below 200mg/kg, and in case of certain treatments it is only 60 mg/kg.
The represented data unambiguously prove the necessity of calcium-carbonat addition.
AL-Mg values show similar differentiation to AL-Ca values. These indicate weak and
medium supply in treatments without Ca and Mg. Increase of magnesium content relate
to the fact that lime powder applied for liming contained magnesium also (Table 2).
Table 2: Effects of treatment on AL-Mg (mg/kg) values in different layers
Treatments
Depth (cm)
0-20 20-40 40-60 Átlag
Control 13.2 13.2 13.2 13.2
N1 7.6 8.3 9.4 8.4
N2 8.4 6.0 6.8 7.1
N3 5.3 8.8 10.1 8.1
N2P1 5.2 10.4 8.4 8.0
N2P2 6.9 10.6 10.4 9.3
N2P3 7.7 9.5 8.7 8.6
N2K1 6.4 5.6 13.0 8.3
N2K2 4.1 6.3 6.9 5.8
N2K3 4.5 7.7 7.1 6.5
N2P2K2 5.9 10.7 6.3 7.6
N2P2K2Ca2 8.8 9.1 9.2 9.0
N2P2K2Mg2 22.2 14.4 16.2 17.6
N2P2K2Ca2Mg2 13.9 15.4 24.6 18.0
CONCLUSION
Data of long-term experiment confirm that on one of the characteristic soil type in
Nyírség i.e. on acidic brown forest soil with thin clay layer triticale can be cultivated
effectively with an adequate nutrient management. The production can be duplicated
related to the untreated control. Nutrient management and adjusting of pH influence
fertility of soils and its maintenance to a great extent.
NPK fertilization using by itself do not make it possible to reach the maximum
yield. Acidic pH depending on the extent of leaching and the lack of calcium are
limiting factors for yield, therefore there is a need for ordinary liming and occasionally
magnesium addition.
One-sided N fertilization is especially to be avoided, while N dominance increase
soil acidifying and the leaching of Ca and Mg. Applying N, P, K fertilization together
adequately improve the utilization of N. Yields of NP and NPK treatments refer to the
importance of phosphorous and potassium fertilization on a given cropland.
AL-Ca values are good indicators of calcium lack. Data of the experiments confirm
the earlier experiences, values under 100mg/kg limit the yield, Ca and Mg are leached
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