一般认为乌桕喜温暖、好水湿、喜光照、耐瘠薄耐盐碱、耐空气污染等,是一种适应性较强的树种,但是乌桕耐旱性也很强。乌桕不但广布温暖湿润的亚热带地区,在云南及四川等省的干热河谷地区广为分布,并且生长发育良好。在云南海拔1800m以下的公路沿线,乌桕是成功的行道树之一,为了全面了解乌桕的生物学特性,择重研究了乌桕的耐旱性。 It is generally believed that Wu 桕 hi warm, good water wet, hi light, resistance to barren saline, air pollution, etc., is a more adaptable species, but also a strong drought tolerance. Not only is it widespread in the warm and humid subtropics, it is widely distributed in the dry-hot valleys of Yunnan and Sichuan provinces, and is well-developed. In the road below 1800m above sea level in Yunnan, Wuyi is one of the successful street trees. In order to fully understand the biological characteristics of Wuyi, the drought tolerance of Wuyi was studied.