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Type of publication: Straipsnis kituose recenzuojamuose leidiniuose / Article in other peer-reviewed editions (S5)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Aksomaitienė, Ramutė;Berankienė, Laima
Title: The changes in nutrient amounts in the river Susve in 1960-2001
Other Title: Biogeninių medžiagų kiekio kaita Šušvėje 1960-2002 m
Is part of: Water management engineering. , Vol. 23(45) (2003)
Extent: p. 23-29
Date: 2003
Keywords: Vandens kokybė;Biogeninių medžiagų išplovimas;Nitratai;Azotas;Fosforas;Tarša;water quality;Nutrient leaching;Nitrate;Nitrogen;Phosphorus;Pollution
Abstract: The paper discusses changes in water quality and leached nutrient amounts in the mid-size river Susve (tributary of the Nevezis). In 1960-1965, mineral nitrogen and phosphate phosphorus concentrations contained in the Susve river water were 0.5 mg/l and 0.015 mg/l respectively; this is considered as background concentration. In 1992-1993, average nitrogen concentration increased 10 times, phosphorus concentration increased 2.7 times (5.2 and 0.04 mg/l respectively). Nutrient concentration shows decreasing tendency during the last years. Leached NP amounts depending on their concentration and river runoff were comparatively small within the study period (1992-2001): on the average there were leached 9.3 kg/ha of total nitrogen, 0.11 kg/ha of total phosphorus, 6.9 and 0.06 kg/ha of mineral nitrogen and phosphorus respectively. Leached NP amounts (10.2 and 0.7% respectively) is insignificant contribution into total pollution which occurs in the basin as a result of the whole agricultural activity
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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