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Root Mass and Root to Shoot Ratio of Different Perennial Forage Plants UNDER WESTERN LITHUANIA CLIMATIC CONDITIONS

Root Mass and Root to Shoot Ratio of Different Perennial Forage Plants UNDER WESTERN LITHUANIA CLIMATIC CONDITIONS

Romanian Agricultural Research 32: 209-219

ISSN/ISBN: 1222-4227

In the Vezaiciai Branch of the Lithuanian Research Centre for Agriculture and Forestry - Albi-Endohypogleyic Luvisol soil experiments were performed to determine perennial forages Trifolium pratense L., Trifolium repens L., Medicago sativa L., Phleum pratense L root mass and root to shoot ratio in differently managed temporary grasslands. Lithuania's Western region's specific edaphic and climatic conditions are suitable for perennial grass development and growth, ensuring a stable biological productivity. Research showed that, for all assessed indicators, perennial grass species and the meteorological conditions in many cases had substantial (P <= 0.01, P <= 0.05) influence. Biomass of different forage types (roots and shoots) were distributed differently in separate stages of age. Strong (r=0.708-0.888) correlation was determined between legumes root and shoot mass. Substantial increase in root mass of timothy and alfalfa of second year of usage influenced the increase of coefficient of biological productivity (respectively: from 0.93 to 4.54 and from 0.75 to 1.71). The proportional annual increase of red and white clover shoots and roots mass had inconsiderable impact on biological productivity coefficient (from 0.34 to 0.66). The amount of precipitation during the year and vegetation period had a significant impact on the shoot and root mass of red clover (r=0.674* to 0.736*). For the timothy and white clover roots biomass, the precipitation during vegetation period (r=0.671* and 0.704*) had significant influence. Correlation was not found between alfalfa phytomass and rainfall indicators.

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