Plant, Soil and Environment | |
Application of modelling by the study of ground water contamination with nitrates under grasslands | |
Klimeš F.1  Kužel S.1  | |
关键词: grasslands; ground waters; nitrates; fertilisation; deterministic and probabilistic models; | |
DOI : | |
学科分类:农业科学(综合) | |
来源: Czech Academy of Agricultural Sciences | |
【 摘 要 】
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.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912010232709ZK.pdf | 783KB | download |