The influence of interspecific agrophytocenosis on weediness of crop rotation

The article reviews about results of research of the department of agriculture of the Voronezh State Agrarian University. The purpose was to determine the effect of perennial leguminous grasses cultivated in binary crops with sunflower and winter wheat in fallow fields, crop weediness, the value generated by weeds biomass and the removal of major nutrients. There is exist increase of weediness of agricultural crops. It is needed the development of a set of activities that ensure the maintenance of the number of weeds in an environmentally safe level with minimum chemical load. Scientifically based technology of cultivation of crops with biologization elements can become one of those ways. As a result of our research is the positive influence of perennial leguminous grasses (yellow sweet clover and alfalfa blue) on the improvement of phytosanitary condition of crops was found out. The use in the link rotation fallow - winter wheat - barley - sunflower a complex of biologization methods (straw + green manure oilseed radish, perennial forage legumes in binary crops and fallow fields) compared to the control field provides for the formation of a lower spreading of weeds (2 PCs/m2) and significantly lower values of biomass (8-21 kg/ha). And also we have a reducing the removal of weeds main macronutrients (Nitrogen - 1.03, Phosphor - 0.05, Potassium - 0.57 kg/ha) and potential weediness of soil (13 million PCs/ha).