绿化城镇、机关、厂矿、学校,以及家庭院落等,在文明社会的人类生活中占有一定位置。近些年来,我国城乡人民对庭园绿化有着极大兴趣和迫切要求,但可以提供的绿化树种不多,难以满足绿化工作的需要。这在北方地区显得尤为突出。仅就我们对榆林地区一些机关绿化进行的调查来看,一般是绿化面积小,树种单一,尤其用作绿篱的树种太少,仅有侧柏、榆树和苏联醋栗。侧柏本身是高大乔木,干性强,成枝力弱,用作绿篱前期较好,十几年后下部即出现光禿现象。其它两种树种为落叶乔木和灌木,冬季落叶后便失去绿篱的美观作用。为了寻找适宜我区及北方栽培的常绿绿篱树种,经多年引种、观察、比较,初步认为我区乡土树种臭柏是适宜于我区及暖温带、半干旱黑焦土森林草原地带以北地区的较为理想的绿篱树种。 Green towns, institutions, factories and mines, schools, and family homes, etc., occupy a certain place in the human life of a civilized society. In recent years, people in urban and rural areas of our country have great interest and urgent requirements for the afforestation of the garden, but there are not many afforested afforested trees and it is difficult to meet the needs of greening work. This is particularly prominent in the northern region. Only on our survey of the afforestation of some organs in Yulin area, generally green area is small, single tree species, especially for hedgerow too few species, only arborvitae, elm and Soviet gooseberry. Oriental arborvitae itself is a tall tree, dry strong, weak branches, as a good early hedgerow, ten years later, the lower part of the phenomenon appears bald. The other two species are deciduous trees and shrubs, losing the beauty of hedges in winter after deciduous leaves. In order to find suitable for our region and the northern cultivation of evergreen hedgerow species, after many years of introduction, observation and comparison, we initially believe that the native tree species Sabina is suitable for my area and warm temperate, semi-arid black scorched soil north of the forest steppe area The ideal hedgerow species.