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Type of publication: Straipsnis Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or / and Scopus (S1)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Morkūnas, Vytautas;Rudzianskaitė, Aurelija;Šukys, Povilas
Title: Influence of agriculture on soil water quality in the karst region of Lithuania
Is part of: Irrigation and drainage. , Vol. 54, iss. 3 (2005)
Extent: p. 353-361
Date: 2005
Abstract: This article presents the results of studies on lysimeters and drainage carried out in the karst zone of Lithuania. The studies included the estimation of the changes of water quality in a soil profile of moraine loam and sandy loam soils in respect of the land usage and fertilization intensity. Fluctuations of N-NO3 concentrations contained in soil water mainly depend on N losses through the yield (r(2)=0.78). The highest N concentrations (up to 28.7 mg l(-1)) were observed in the fields where potatoes were grown; six times lower N concentrations occurred in the fields of barley with undercrop and the lowest N concentrations (up to 5.1 mg l(-1)) were determined in fields of perennial grass. This was because N losses with the yield of potatoes are 1.7-2.0 times less than its losses with barley and even 3.0-4.5 times less than N losses with perennial grass. Efficient application of fertilizers results in decreased N-NO3 and TP concentrations contained in soil water (r(2)=0.27-0.56 and r(2)=0.18-0.57 respectively). Compared to the field of perennial grass, the arable land contained even 9 times higher N-NO3 concentrations and 2.6 times lower TP concentrations in the whole soil profile. However, when migrating into deeper soil layers in arable land, N-NO3 concentrations decrease, while in the field of perennial grass the lowest N-NO3 concentrations occur in the root z one of plants
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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