PHOTOSYNTHETIC PRODUCTIVITY OF MEADOW CLOVER CROPS COVERLESS AND UNDERCOVER CROPS, DEPENDING ON THE NORMS OF THEIR SOWING

Abstract

The productivity of under-cover and no-cover sowings of meadow clover under different sowing rates of cover and under-sowing crops in the forest-steppe remains insufficiently studied, the choice of sowing method is determined by biological, soil-climatic conditions, economic and economic possibilities of the farm. The article presents the results of studies on the influence of the method of creating a grass stand and different sowing rates of cover crops and under seeding on the formation of photosynthetic productivity of meadow clover crops in the conditions of the right-bank forest-steppe of Ukraine. Research has established that the method of creating a grass stand and the rate of sowing of cover crops and seed crops significantly influenced the level of yield, the formation of indicators of the assimilation surface, photosynthetic potential and the use of photosynthetically active radiation (PAR) by meadow clover grass stands. Research has established that the method of creating a grass stand and the rate of sowing of cover crops and seed crops significantly influenced the level of yield, the formation of indicators of the assimilation surface, photosynthetic potential and the use of photosynthetically active radiation (PAR) by meadow clover grass stands. At the same time, it should be taken into account that no-cover sowing was in the second year, while under-cover sowing was in the first year of using the grass stand. In coverless crops, with an increase in the rate of sowing seeds, the area of the leaf surface increased. In all cases, increasing the sowing rate of cover crops reduced the leaf surface area of clover in the second year of life. The conducted studies showed that grass clover accumulates solar energy most effectively in the first year of use. The coefficient of use of PAR was in the range of 2,01-1,66%. Its maximum value was noted on the option with clover under-sowing under millet with the minimum rate of its sowing and the average meadow clover – 2,01%.