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刺槐又名洋槐,蝶形花科,原产美国东部,我国从20世纪初开始引种。刺槐在我国的分布极广,许多地方均有栽培。刺愧系落叶乔木,高可达25米,胸径60厘米。刺槐孤立树生长时,树冠大,分枝低,干材矮,多弯曲;密林生长时,树冠小,干形直。该树种是温带树种,它喜温、喜光、喜湿润,怕涝、较耐旱,适生于多种土壤,肥沃疏松土壤更好,有一定的耐盐碱能力。最适宜生长的温度是:年平均温度8至14℃,在年均温度14℃以上的地区,生长速度很快,但速生期短。刺槐以幼龄期生长最快,树高在5年内,直径在10年内生长最快。在立地条件较好的地方,年平均高生长可达2至3米,直径
Locust also known as acacia, butterfly flower family, native to the eastern United States, China from the early 20th century introduction. Black locusts are widely distributed in our country and are cultivated in many places. Deva shame deciduous trees, up to 25 meters, diameter 60 cm. Acacia isolated tree growth, the crown large, low branches, dry materials, short, more curved; the growth of the jungle, small canopy, stem straight. The tree species is temperate tree species, it is warm, hi light, hi moist, afraid of floods, more drought-tolerant, suitable for a variety of soil, fertile loose soil better, have a certain ability to salinity. The optimum growth temperature is: the annual average temperature of 8 to 14 ℃, the average annual temperature above 14 ℃ in the region, the rapid growth, but the short fast life. Robinia pseudoacacia grows fastest in young age, tree height in 5 years, the fastest growth in diameter within 10 years. In the better site conditions, the annual average high growth of up to 2 to 3 meters in diameter