CENOTIC ACTIVITY OF LEGUMENOUS COMPONENTS IN MEADOW GRASS STANDS ON SOD-GLEY RECLAIMED SOIL

Abstract

On average, over 6 years, coenotic activity index (ICA) of white clover mixed with alfalfa in legume-grass stand was higher than ICA of white clover mixed with other leguminous species, and it decreased in the seventh year of use. ICA of white clover reduced sharply in the 6–7 th year, and the index of white clover mixed with alsike clover or Lotus corniculatus - in the 4th year. Fertilization did not change the ICA of white clover mixed with alfalfa, but in grass mixtures with Festuca arundinacea or alsike clover fertilization reduced the index by 7.3–17.3 %, and lotus corniculatus and/or white clover - it increased by 8.1–16.2 %. The correlation between coenotic activity index and hydrothermal coefficient was weak in grass stands with white clover, white clover and Lotus corniculatus or alfalfa, and moderate in white clover with alsike clover (r=0.33–0.46).