Naslov
Balance of Precipitation Water And Nitrates Leaching In The Soil

Autori
Vidaček, Željko ; Sraka, Mario ; Vrhovec, Danijela

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings VIII. International Symposium on Water management and Hydraulic Engineering / Šoltesz, Andrej - Pribylina-Podbanské : Faculty of Civil Engineergin, Slovak University of Technology in Bratislava, 2003, 469-469

ISBN
80-227-1954-4

Skup
Water Management and Hydraulic engineering

Mjesto i datum
Podbanské, Slovačka, 05.10.2003. - 09.10.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
water balance ; alluvial soil ; crops ; watwer runoff ; nitrates

Sažetak
Balance of precipitation water and nitrates leaching in the soil were measured at the lysimeter station Zagreb-Maksimir under the conditions of intensive crop rotation and humid continental climate of northwestern Croatian during the period 1990-1999. In natural state Garnier lysimeters contained homogeneous-isotropic soil of 0.6 m depth. Direct and/or indirect measurements included: precipitation, water percolation, supplies of available soil moisture, effective evapotranspiration and nitrate concentration in percolated water. Annual precipitation amounted to 650.1 to 1040.7 mm and annual water percolation was 15 to 39% of fallen precipitation. Effective evapotranspiration ranged from 166.2 mm for winter vetch and rye grown in 1991/92 to 437.3 mm for soybeans grown in 1998. In the warm and dry part of the year (April-September) supplies of available water ranged from the field water capacity to the wilting point, and in the cold and humid part of the year (October-March) around the field water capacity. In nitrogen fertilization with 24 to 156 kg of active ingredient per ha, nitrate concentrations in percolated water ranged from 0.2 to 260.5 mg NO3-/l. In the cold and humid part of the year with the highest leaching, some of the determined concentrations exceeded the maximum allowable ones (MAC), which pursuant to the statutory regulations of the Republic of Croatia amount to: less than 2.2 for water category I, 2.2 to 6.6. for water category II, 6.6 to 17.7 for water category III, 17.7 to 44.3 for water category IV, and more than 44.3 mg NO3-/l for water category V.

Izvorni jezik
Engleski

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