Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/85039
Type of publication: research article
Type of publication (PDB): Straipsnis kituose recenzuojamuose leidiniuose / Article in other peer-reviewed editions (S5)
Field of Science: Ekologija ir aplinkotyra / Ecology and environmental sciences (N012)
Author(s): Rudzianskaitė, Aurelija
Title: Investigations of nitrogen, phosporus and potassium balance in the soils of karst zone
Other Title: Azoto, fosforo ir kalio balanso tryrimai karsto zonos dirvožemiuose
Is part of: Water management engineering. , Vol. 18(40) (2002)
Extent: p. 53-58
Date: 2002
Keywords: Azotas;Fosforas;Kalis;Balansas;Išplovimas;Nitrogen;Phosphorus;Potassium;Balance;Leaching
Abstract: Straipsnyje pateikiami pagrindinių augalų maisto medžiagų (azoto, fosforo ir kalio) balanso skaičiavimai lauko sėjomainai karsto zonos moreniniuose priesmėlio dirvožemiuose. Nustatyta, kad azoto balansas tampa perteklinis, kai dirva bulvėms auginti tręšiama N60, miežiams auginti - N100 norma (daugiametės žolės azotu netręšiamos); fosforo perteklinis balansas visiems augalams būva tręšiant P30, kalio - bulvėms ir daugiametėms žolėms auginti tręšiant K120, miežiams - K60 normomis. Augalų maisto medžiagų išplovimas didėja, kai šių medžiagų balansas mažiausiai deficitinis ar perteklinis. Azoto išplovimas, kai balansas daugiausia deficitinis, siekė 24, o kai mažiausiai deficitinis, – 4 kg/ha; fosforo, kai perteklinis balansas mažiausias, išplaunama 0,1, kai didžiausias, – 0,2 kg/ha, o kalio - atitinkamai 3 ir 5 kg/ha
The paper presents calculations of balance of the main plant nutrients (nitrogen, phosphorus and potassium) for crop rotation in moraine sandy loam soils of karst zone. It has been established that surplus nitrogen balance is observed when the soil is fertilized with the following rates: N60 for potatoes, N100 for barley (no nitrogen is applied when perennial grass is cultivated). Surplus phosphorus balance occurs when all plants are fertilized with P30 rate. Surplus potassium balance is observed when applied potassium rates are as follows: K120 for potatoes and perennial grass, and K60 for barley. The least surplus or deficient balance of plant nutrient results in the increase of plants nutrient leaching. Under the conditions of the most deficient balance the leached amounts of nitrogen, phosphorus and potassium were 24, 0.1 and 3 kg/ha respectively; when the balance was least deficient the leached amounts of these elements were 4, 0.2 and 5 kg/ha respectively
Internet: https://hdl.handle.net/20.500.12259/85039
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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