EFFECT OF INTERSPECIFIC COMPETITION ON THE GROWTH OF ALIEN SPECIES SAGITTARIA GRAMINEA AND LOCAL RELATIVES

In order to investigate the relationship between the invasive plant Hexiadian and its native genus Sagittaria Sagi, the study was conducted in the greenhouse with Sagittaria graminea and S.angustifolia as the experimental materials. Control experiment. Experiments were set up single planting and mixed planting two ways to measure the biomass of each plant and other growth indicators, and analyzed the relationship between species. The results showed that the interspecific competition significantly increased the leaf area, plant height, root weight and inflorescence weight of Vaccinium argenteus, and the intraspecific competition significantly reduced the total weight, the dry weight of leaves and the dry weight of leaves, and the interspecific competition increased significantly Wo Ye arrowhead male flowers, species competition significantly reduced the number of female flowers. Interspecific competition significantly reduced leaf number and leaf dry weight of Sagittaria angustifolia, significantly increased leaf area, root dry weight and inflorescence dry weight. Competition within the species significantly reduced leaf area, plant height, number of leaves, Total dry weight, root weight, petiole weight, leaf weight and inflorescence weight. The interspecific competition significantly increased the male flower number, the female flower number and the total flower number, but the interspecific competition significantly reduced the male flower number, the female flower number and the total flower number. The interspecific competition ability of Heye Sagu was significantly higher than that of Sagitta angustifolia.