榆树是我区乡土树种。但是人们对当地榆树种源没有充分利用起来,却习惯于到河北、河南等地购买。到外地购买种子有两大弊病:一是种子数量和质量没有保证;二是长途运输成本高、时间长,影响按时播种,苗木不能当年出圃。因此还是自己动手采种好。榆树采种和种子调制方法都比较容易,但要掌握好下述三个环节。一、采种要适时。榆树先开花后放叶,其果实为翅果,种子位于果翅中间,俗称榆钱。榆树种子的成熟 Elm is a native tree species in my area. But people did not make full use of the local elm provenance, but used to go to Hebei, Henan and other places to buy. The purchase of seeds to the field has two major drawbacks: First, there is no guarantee of the quantity and quality of seeds; Second, long-distance transport costs are high, a long time, affecting the timely sowing, nursery stock can not be out of nursery. Therefore, it is good for yourself. Elm seed selection and seed modulation methods are relatively easy, but to master the following three links. First, seed mining should be timely. Elm first leaves after flowering, the fruit is the samara, the fruit is located in the middle of the wing, commonly known as elm money. Elm seeds mature