Energy evaluation and competitiveness of technological methods for growing sowing alfalfa for seeds

Abstract

Purpose. To establish the influence of crop treatment with plant growth stimulator, microfertilizer-compensator, fungicide on the indicators of energy efficiency and competitiveness of alfalfa seed grass stands in conditions of Northern Podillya. Methods. Field experiment, calculation and weighting, mathematical statistics. The studies were carried out at the Khmelnitsky State Agricultural Experimental Station of the Institute of Feed Research and Agriculture of Podillya of NAAS during 2019-2020 on podzolized medium loam black soil. Results. The best technological methods for growing alfalfa in grass stands of the fourth-fifth year of life, which ensured an increase in the energy value of the crop, as well as energy and integral assessment coefficients, and competitiveness, were determined. The highest yields of 1.84 c/ha and energy efficiency of growing alfalfa for seeds with the highest energy value of the crop – 32.76 GJ/ha, energy efficiency coefficient of 2.51 c.u. provided a combination of treatments: plant growth stimulator Vympel (0.5 l/ha) with microfertilizer Oracle colofermin boron in the budding phase, Akanto Plus fungicide (0.5 l/ha) in the stalking and budding phases. Complex treatment with those preparations and application of double fungicidal treatment had a positive effect on the increase in the energy efficiency Ke (1.15 c.u.), integral assessment J (1.20 c.u.) and competitiveness Cmp (1.18 c.u.) coefficients. Conclusions. It was established that the growth of indicators of energy efficiency and competitiveness of growing seed grass stands was a result of the double application of Akanto Plus fungicide in the phase of stalking and budding. The energy efficiency of fungicidal treatments increased when combined with plant growth stimulator and compensating microfertilizer used in the budding phase.