2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures

Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology
nutrient transport assessment from soils to surface
water was studied through transport of dissolved and adsorbed
forms of n and P.
Table II
Concentration of n and P in SWB sediments
Sample n tot [%] P tot [%]
S1 0.26 0.112
S1’ (100 %) 0.26 0.112
S2 0.24 0.113
S2’ (97.65 %) 0.24 0.110
S3 0.22 0.066
S4 0.23 0.066
S5 0.24 0.112
S5’ (89.24 %) 0.25 0.115
S6 0.20 0.090
S7 0.17 0.049
S8 0.14 0.070
Fig. 2. Influence of sampling distance from the dyke on the N
and P sediment concentration
For determining nutrient concentrations in dissolved
phase several leaching experiments were realized. Expe-
s398
riment results have shown that portion of dissolved phase
represented 0.46–0.65 % of total P and 0.37–0.46 % of total n
in the soil sample. According these findings, dissolved phase
weren’t considered.
As follows from Table I, nitrogen concentrations in
adsorbed phase of soils varied from 0.08 % to 0.23 % and
phosphorus concentrations were in range 0.054 % to 0.082 %.
It depends on rates and date of fertilizer application and also
on type of grown crop and its uptake rates (samples P1–P4
before and P5–P8 after nitrogenous fertilizer application).
Conclusions
The concentration of nutrients in studied soil samples
wasn’t influenced by their granularity and depends on the
applicable fertilizer rates and grown plant uptake.
The results from chemical analyses confirmed the literary
information that the concentrations of P, n in chosen
sediment samples are diverse due to irregular sediment deposition
in the reservoir and increase with proportion of the
finest particle fraction.Concentrations of P, n in sediments
correspond to their concentrations in soils what is in accord
with our results about their maximal portion in adsorbed
phase.
This work has been supported by the Slovak Grant
Agency for Science (Grant No. 1/0613/08).
REFEREnCES
1. Bálintová M., Kovaliková n.: Sel. Sci. Pap. 1, 189
(2005).
2. Mahler R. L., Tindall T. A.: Coop. Ext. Bull.1997, 704
3. Methodological instruction of Ministry of environment
SR no. 549/98-2
4. Kovaliková n., Bálintová M.: Acta Facultatis Ecologiae
16, 129 (2007).