根据上海地区的立地条件及城市森林建设的需要,上海自1999年起先后从气候相似的美国西南部引进三大类栎树实生苗,包括南方红栎、北方红栎、苏玛栎、纳塔栎等,补充了城市生态建设树种资源多样性的需要,并在其生物学特性、抗逆性及生态适应性评价等方面做了大量工作。同时发现不同树种、种源间发芽时间、苗高、冠幅生长、耐水湿、耐盐碱能力、秋季物候及叶色等性状方面存在非常大的差异。上海园林科研所通过连续多年的系统观察和相关生理指标的测量、比色卡的比对,以速生、色叶期长、色彩整齐度高为首选标准,兼顾抗逆性(耐盐碱、耐水湿),筛选出苏玛栎中的优良 According to the site conditions in Shanghai and the needs of urban forest construction, Shanghai has introduced three types of oak tree seedlings from the climate-similar southwest of the United States since 1999, including Southern Red Oak, Northern Red Oak, Oak, etc., which supplement the need of species diversity in urban ecological construction and do a great deal of work in the aspects of biological characteristics, stress resistance and ecological adaptability evaluation. At the same time, we found that there are very big differences in germination time, seedling height, crown growth, water-wettability, salt-tolerance ability, autumn phenology and leaf color among different tree species and provenances. Shanghai Gardens Research Institute through years of systematic observation and related physiological indicators of the measurement, the ratio of color-coded card to fast-growing, long color bucket, color uniformity as the preferred standard, taking into account resistance (salt, water Wet), screened Suma oak in the fine