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Type of publication: research article
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Misevičienė, Stefanija
Title: Tręšimo skystuoju mėšlu įtaka judriojo kalio koncentracijai ir išplovimui rudžemyje
Is part of: Vandens ūkio inžinerija. , Nr. 35(55)(2009)
Extent: p. 32-41
Date: 2009
Keywords: Išplovimas;Kalio balansas;Skystasis mėšlas;Leaching;Liquid;Manure;Potassium balance
Abstract: The article discusses the results of the research carried out in Juodki kiai trial field of WMI LUA in 1999 2003. Modernization of large-scale animal husbandry enterprises results in the accumulation of huge amounts of liquid manure and fields are fertilized with this fertilizer while limiting the amount of nutrients in terms of nitrogen. Due to this fact every year different amounts of potassium enter crop rotation fields together with liquid manure depending on its composition. The research was targeted at establishing potassium accumulation and leaching from crop rotation fields fertilized with liquid manure as well as the rates of this element that do not impoverish soil and do not pollute the natural environment as systematic fertilization with manure has influence on potassium regime in soil (increases the amount of soluble and metathesis potassium). Therefore, the influence of fertilization and other indicators on the variation of potassium in soil, the balance of this element and leaching into drains during crop rotation was investigated. To calculate the balance the potassium amounts present in plant residues and drainage water and passed in with precipitation, seeds, fertilizers and taken out with yield (secondary and primary production) were established. When fertilizing with liquid manure potassium balance was negative while growing perennial grasses as much potassium was needed to mature their yield. The investigations established that potassium concentration in drainage water and its leaching was increased by precipitation during the research period and it was reduced by the amount of this element taken out with yield. Soil geochemical environment had influence on the increase of potassium supply in soil. [...]
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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