THE REACTION OF AGROPHYTOCENOSIS COMPONENTS TO COENOTIC STRESS

Abstract

The reaction of barley agrophytocenosis components to coenotic stress in the conditions of forest-steppe inKemerovoregion is determined. The studies were conducted at the experimental test site of the Department of Agriculture and Plant of Kemerovo State Agricultural Institute. The researchers simulated different situations of the mutual influence of barley plants (Odessa-100 and Luke varieties), weeds and root rot pathogens influence due to the density of the cultural component: 4.5, 6.5, 8.5 million germinating grains per area unit. The hydrothermal coefficient (during the growing season of 2012) was 0.99, which had an impact on the growth reaction of the components and the development of root rot – Bipolaris sorokiniana. The study revealed that the density of stalks has virtually no effect on the diversity of weeds, a minor type of debris is formed with the dominance of spring weeds (Galeopsis speciosa Mill, Galium aparine L., Chenopodium album L.). Seeding density and stages of ontogeny affect the layering and morphological parameters of the components (plant height, diameter of internodes). At the tillering and earing stages weeds occupy presoil and medium tiers. The Luka variety has a higher degree of competitiveness with the productivity of 640 h / m2