Стихийное зарастание законсервированных пахотных земель семенным возобновлением Ulmus pumila L. в сухостепной зоне Республики Хакасия

Abstract

On lands with existence of anthropogenic transformation of vegetable communities (at first an arable land, further a deposit) in a dry steppe zone of the Republic of Khakassia degree of an invasion of Ulmus pumila L. exceeds admissible norms on the old deposits which are poorly used as pastures. Spontaneous overgrowing of arable lands seed renewal of an elm stocky has made from 32 to 44 %. On the lands which are intensively used for a pasture of animals where the bushiness has made 17 % carrying out regular monitoring is required. Overgrowing of spontaneously preserved lands seed renewal of Ulmus pumila happened unevenly as in separately taken between strips field, and in general on the system of windbreak forest fields. Within separately taken between strips field the maximum density of individuals was observed near a forest strip from the party which is behind wind, within the system of windbreak forest fields in the wind percussive of between strips fields she was the smallest with advance to the center from 27 to 45 % of their total number increased.