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

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

Plant, Soil and Environment, 2004, vol. 50, issue 3, 122-128

Abstract: 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 (search for similar items in EconPapers)
Date: 2004
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:50:y:2004:i:3:id:4017-pse

DOI: 10.17221/4017-PSE

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