刺槐(Robinia Pseudoacacia-L.)原产美国东部的阿拍拉契亚山脉和奥萨克山脉一带,二十世纪初开始从欧洲引入我国。刺槐具有生长快、材质好、用途广、耐干旱瘠薄、适应性强、育苗造林技术简单等优点,现在已成为我省黄土沟壑,浅山丘陵和沙荒造林的主要用材树种之一。由于刺槐分布范围广泛,育苗种子来源不一,在极其复杂的生境因子作用下和长期演化过程中,在种内不同植株之间形成了在其形态特征,生长量,木材品质等方面具有明显差异的变异类型。据调查,在相同立地条件下,不同类型的刺槐,其生长速度和不材品质有很大的差异。因此,选择刺槐优良类型和单株进行繁殖,并进一步建立母树林、采穗圃、种子园,早日实现刺槐生产良种化,使今后刺槐栽培向着速 Robinia pseudoacacia-L. Is native to the areas of the Appalachian and Osak ranges in the eastern United States and was introduced into China from Europe in the early 20th century. Robinia pseudoacacia has the advantages of fast growth, good material, wide use, drought-resistant infertility, strong adaptability and simple seedling afforestation techniques. Now it has become one of the main timber species for loess gully, shallow hills and desertification in afforestation. Because of the wide distribution of acacia locusts, the seeds of seedlings are of different origins. In the process of extremely complicated habitat factors and long-term evolution, there are obvious differences in morphological characteristics, growth and wood quality between different plants within the species Variation types. According to the survey, in the same site conditions, different types of black locust, its growth rate and quality are not very different material. Therefore, selecting the best type of locust and breeding single plant, and further establish the mother woods, mining garden, seed orchard, as soon as possible to achieve the production of acacia varieties, so that the next to speed locust cultivation