Photosynthetic activity of twoand three-way vetch-cereal mixtures in Central Non-chernozem zone

In the adaptive landscape system of agriculture much attention is paid to multi-component lequme-cereal mixtures, which use natural factors more fully and provide higher productivity than two-component mixtures. We have studied two and three-component mixtures on the dynamics of biomass accumulation, the formation of leaf area and the main indicators of photosynthetic activity of crops (photosynthetic potential (PSP) and net productivity of photosynthesis (NPP). It is established that on sod-podzolic sandy loam soil the greatest biomass is formed by vetch-oat-wheat and vetch-oat mixture (respectively 64.6 and 62.4 C/ha). This is achieved in the vetch-oat mixture due to the high leaf surface and high intensity of photosynthesis in oats; and in the vetch-oat-wheat mixture - due to the high leaf surface of the grass component and the high intensity of vetch photosynthesis. The minimum biomass is formed by vetch-wheat and vetch-barley mixtures, since barley has low net productivity of photosynthesis, and wheat has a low leaf area. Share of vetch in biomass is higher in vetch-barley mixture - 33.3%; in vetch-wheat and vetch-oat mixtures the share of vetch is respectively 27.3 and 26.4%.

вика посевная, овeс, яровая пшеница, ячмень, смеси, накопление биомассы, площадь листьев, фотосинтетический потенциал, чистая продуктивность фотосинтеза, vetch, oats, spring wheat, barley, mixtures, biomass accumulation, yielding, feed units, leaf area, photosynthetic potential, net productivity of photosynthesis