THE KEY ASPECTS OF THE PRODUCTION PROCESS OF MYSCANTHUS GIGANTEUS UNDER THE CONDITIONS OF THE MIDDLE VOLGA REGION

Abstract

Currently, an urgent task is to find environmentally friendly and economically accessible energy sources for multi-purpose use. One such resource is a perennial plant from the bluegrass family, Miscanthus giganteus, which has a significant increase in above-ground mass by C4-photosynthesis, but cannot realize its potential as a crop with high rates of photosynthetic activity, because in the year of planting it competes poorly with weeds. Therefore, we studied ways to control the weed component in the agrocenosis of miscanthus on the light gray soil of the collection area of Penza State Agrarian University. In the years of the research, characterized by different hydrothermal conditions (HTC 0.64-1.29), it was found that the herbicides of systemic action Balerina and Magnum in the background of Tornado 500 contribute to an increase in the leaf area of miscanthus in the first year up to 18.36...19.09 thousand m2/ha, in the photosynthetic potential to 496.1...508.7 thousand m2∙day/ha. The maximum values of net productivity of photosynthesis (0.62...0.85 g/m2∙day) were observed at the end of June. Due to the double chemical weeding the decrease of weeds leads to the maximum yield of above-ground mass – 8.92...9.09 t/ha. The highest dry matter yield of 2.13...2.97 t/ha was obtained using the Tornado 500 in combination with the herbicides Balerina and Magnum.

Keywords

• photosynthesis
• assimilative surface area
• miscanthus giganteus
• dry matter harvesting
• weed control
• herbicides