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河北杨(Populus hopeiensis Hu et Chow.)又名椴杨、青杨、串杨、银杨,具有生长迅速、适应性强、根系发达、萌蘖力强等特性,是西北、华北黄土丘陵地区和风沙区的优良造林树种之一。河北杨在陕西省北部分布较广,以吴旗、横山、榆林和无定河两岸最多。河北杨为我国特产,多为雌株,但不易获得种子;扦插育苗因枝条生根困难,成活率很低。长期以来,群众多采用挖根蘖苗或埋根育苗等方法进行造林,但由于根蘖苗或根条数量有限,使这一树种的发展受到限制。
Populus hopeiensis Hu et Chow., Also known as linden poplar, poplar, string poplar, silver poplar, with rapid growth, adaptability, developed root system, strong sprouting and other characteristics of the Northwest, North China Loess Hilly and Wind and sand area of the afforestation tree species. Hebei Yang in the northern part of Shaanxi Province is widely distributed to Wuqi, Yokoyama, Yulin and Wudinghe most of the two sides. Hebei Yang specialty for our country, mostly female plants, but not easy to get seeds; cuttings nursery shoots due to difficulties, survival rate is very low. For a long time, many people use the method of digging rooted tillers or rooted nursery for afforestation, but due to the limited number of root tillers or rhizomes, the development of this tree species is limited.