Plant Soil Environ., 2004, 50(3):122-128 | DOI: 10.17221/4017-PSE

Application of modelling by the study of ground water contamination with nitrates under grasslands

F. Klimeš, S. Kužel
Faculty of Agriculture, University of South Bohemia in České Budějovice, Czech Republic

At permanent grassland in the foothill regions of the Šumava (545 m a.s.l. subassociation Trifolio-Festucetum alopecuretosum Neuhäusl 1972), relations between the use of different doses of N(+PK) and contamination of ground waters with nitrates have been studied with the application of deterministic and probabilistic models with the aim of elaborating a theoretical basis and new methodological approaches for polycriterial optimisation of fertilisation of grass stands. Mutual relations between the use of doses N(+PK), build-up of primary production and perlocations of NO3- into ground waters, expressed by that of unit and marginal values of both these processes showed a mirror-like inversion course with a remarkable co-incidence of reverse local extremes. Within the range of doses from 0 to 100 kg N(+PK)/haP helps, at the ratio of the applied doses P:N 1:1.5-2.5, to a considerable decrease in the concentration of NO3- in ground waters. Specification of suitable doses of N(+PK) to ecologically and phytocenologically similar stands is discussed.

Keywords: grasslands; ground waters; nitrates; fertilisation; deterministic and probabilistic models

Published: March 31, 2004  Show citation

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Klimeš F, Kužel S. Application of modelling by the study of ground water contamination with nitrates under grasslands. Plant Soil Environ. 2004;50(3):122-128. doi: 10.17221/4017-PSE.
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