柠条是豆科锦鸡儿属落叶灌木,又叫毛条、白柠条,广泛分布在陕西省榆林市毛乌素沙区,面积约450万亩。其中榆林横山县、神木县、清涧县分布面积最大,仅横山县就有柠条约100多万亩,占该县林地总面积的一半以上。早在1980年横山县就成为全国优质柠条采种基地,近年来,横山县年采种量超过70万公斤,大量销往内蒙古、甘肃、宁夏等地,用来治理毛乌 Caragana kaempferi Leguminosae is a deciduous shrub, also known as tops, white kelp, are widely distributed in the Mu Us sand area of ​​Yulin City, Shaanxi Province, an area of ​​about 4.5 million mu. Yulin County, Yulin County, Shenmu County, Qingjian County, the largest distribution area, only Hengshan there Caragana about more than 100 acres, accounting for more than half of the county’s total area of ​​woodland. As early as 1980, Hengshan County became the national high quality Carambola Seed Production Base. In recent years, Yokoyama Prefecture has collected more than 700,000 kilograms of seeds annually and sold them in large quantities to places such as Inner Mongolia, Gansu and Ningxia,