Pay attention to distinguish between true and false in the introduction of Robinia pseudoacacia

At present, there are four kinds of false inferior Robinia pseudoacacia seedlings sold in the market: (1) Safflower Robinia pseudoacacia instead of Robinia pseudoacacia. The Corolla of Robinia pseudoacacia and Robinia pseudoacacia are both butterfly-shaped purplish red. Safflower Robinia pseudoacacia blossoms once a year, bears pods and is grafted with Robinia pseudoacacia as rootstock. Robinia pseudoacacia blossoms twice a year, does not bear pods, and propagates in root segments. (2) aged seed root. The seed root of perennial Sophora japonica has a very low germination rate due to aging. According to the trial planting, the roots of Sophora japonica for more than two years should not be used as seedlings, let alone sold in the market, so as not to cause huge losses to customers. (3) grafted seedlings of Robinia pseudoacacia. The grafted seedlings with Robinia pseudoacacia branches and Robinia pseudoacacia seedlings as rootstocks can be directly used for engineering greening, but can not be used for propagation. The seedlings propagated from the roots of the seedlings will all be Robinia pseudoacacia seedlings. (4) adulteration with Robinia pseudoacacia or Amorpha seedlings. Robinia pseudoacacia seedlings are large and hard, Amorpha has no thorns, and Robinia pseudoacacia has a small number of small thorns. At present, most of the seed roots of Sophora japonica are mixed with Robinia pseudoacacia and Amorpha fruticosa. The root of Sophora japonica is softer than that of Robinia pseudoacacia, the skin color is yellow, the root nodule is less than that of Robinia pseudoacacia, and the root epidermis of Amorpha is smoother than that of Robinia pseudoacacia, but the finer root is difficult to identify.