The role of allelopathic influence of Acer negundo L. on the growth of herbaceous plants

The article analyzes the results of the influence of allelopathically active substances of plant litter and soil on the growth of herbaceous plants of the lower tier in various phytogenic zones of the maple ash-leaved. As model objects the seeds of the Melilotus officinalis and Poa pratensis were used. The study of the allelopathic effect of maple ash-leaved litter was carried out by bioassay, the soil - by experiment. In early July the seeds of grassy plants were sown in containers with soil selected under A. negundo plantations in transformed plant communities. Soil samples were taken in the subcrown and near-ground zones of the studied trees. The outer zone of single trees was chosen as a control. The biometric indicators of the test objects under study were calculated on the basis of determining the height and mass of the plants. For studies of growth parameters, a sample of ten plants was used in triplicate from each site studied. According to the results of the experiments, it was revealed that the highest rates of germination energy and seed germination in the test areas are in the M...