Retrospective analysis of weediness of annual fodder herb crops on the territory of Leningrad region
Keywords:
: weed plant, annual fodder herb, species composition, dominating species, accompanying species, similarity, differenceAbstract
Annual fodder herbs are an important component of diet of farm animals. Research objective is to reveal the most stable weed components in crops of annual herbs on the territory of Leningrad Region. The results of crop monitoring, retrospective and floristic analyses of specific composition, assessment of constancy of species occurrence are carried out. The specific structure is presented by 129 species, 90 genus, 27 families. Groups of 14 dominating and 14 accompanying species are allocated. Comparison of specific composition of weed plants of crops of herbs of agroclimatic areas II and V-1 is carried out. Their similarity and distinction are shown. Groups of dominating (14 and 18 species respectively) and accompanying (18 and 10 species respectively) species are allocated. The forecast of preservation of the revealed tendencies in representation of species of weed plants in crops of annual herbs, of stable presence of 28 weed species, which are the center of weediness in agrophytoсenoses of this culture, is given.