HERBAGE PRODUCTIVITY OF THE QUERCUS ROBUR L ARTIFICIAL STANDS AT THE RIGHT - BANK STEPPE OF UKRAINE

The aboveground and underground herbage phytomass in artificial stands of Quercus robur L. at the Right - Bank Steppe of Ukraine was studied. It has been established that stands age influences on the species representation of plant communities, on the amount of aboveground and underground phytomass, and also on the nature of the root distribution in soil horizons with depth changes. The greatest common overground phytomass was recorded in Q. robur tree stands at the age of 40 years. We revealed that the main mass of the roots of grass vegetation in oak stands is localized in the soil layer 0 – 10 cm and decreases with depth.