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Žemės ūkio mokslai / Agricultural Sciences

ISSN 1392-0200

2004 m. Nr. 3

Šlaitų dirvožemio vandeninės erozijos priklausomybė nuo žemdirbystės sistemų

Research data were obtained on sandy loam Eutric Albeluvisols at the Kaltinėnai Research Station of the Lithuanian Institute of Agriculture on the undulating hilly topography of the Žemaičiai Upland of Western Lithuania. A combination of perennial grass species and selected crop rotations can help prevent soil erosion in upland regions and minimize the risk of soil erosion and associated water pollution. The aim was to identity crop and crop rotations as different land use systems that would minimize soil erosion during a long-term period. The measured water erosion rates according to 18 years of field experiments were: 3.17– 8.6 m3 ha–1 yr–1 under winter rye, 9.01–27.09 m3 ha–1 yr–1 under springo barley and 24.2–87.12 m3 ha1 yr–1 under potatoes. Perennial grasses completely prevented water erosion. The erosion-preventive grass–grain crop rotations (66.7% of grass) decreased soil losses on arable slopes of 2–5°, 5–10° and 10–14° by 74.7–79.5%, while the grain–grass crop rotation (33.3% of grass) decreased the rates by 22.7–24.2% compared with the field crop rotation. The main attributes of the proposed land conservation and sustainable land-use system were careful selection of optimum erosion-preventive ecosystems (sod-forming perennial grasses or erosion-preventive crop rotations) with high erosion-resisting capabilities. These systems would vary in response to slope and soil conditions.Such ecosystems assist erosion control and thus the ecological stability of the undulating topography. These results may have a wider applicability on the undulating landscapes of the temperate climate zone.

Raktažodžiai: undulating hilly topography, water erosion rates, erosionpreventive crop rotations, temperate climate


2012 - T.19

2011 - T.18
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2010 - T.17
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2009 - T.16
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2007 - T.14
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Nr.1, Nr.1.Priedas, Nr.2, Nr.3, Nr.4

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