THE INFLUENCE OF PROTECTION MEANS ON PHOTOSYNTHETIC ACTIVITY, PRODUCTIVITY AND QUALITY OF SOYBEAN VARIETIES IVAN KARAMANOV
The study was carried out in 2015-2016 with the aim of obtaining experimental data about the influence of plant protection exerted on soy photosynthetic activity and production. In the course of experiment the following biological and chemical means of protection were studied: TMTD, concentrate of water suspension; Immunotsitofit, tablets; Zircon, solution; Bisolbifit, powder and Extrasol, liquid; Nutri Fait, liquid with the water softener Spartan, liquid; liquid humus fertilizer, Optimo, emulsion concentrate (CE) that provide reduction of the disease affection, increase in productivity and plants resistance to environmental conditions (variety Ivan Karamanov was taken as an example). The experiments were organized in corn-soybean crop rotation on meadow-brown loamy soil at the Far East Research Institute of Agriculture. The use of the test preparations on soy sown areas provided increase in leaf area in comparison with control variant by 502-7159m²/ha, photosynthetic factor - from 2,5 - 3,4 millionm²*days/ha. One can see true increase in soy crop yield by 7.6, 7.0 and 6.8 centner/ha (as compared to the control variant) when soy seeds and sown areas were treated with Zircon, solution, Extrasol, liquid and TMTD, concentrate of water suspension with Optimo, emulsion concentrate (CE) correspondently and increase in protein content within 1.09 to 2.41%.