论文部分内容阅读
杜松又叫刚松、捧几松,属柏科、桧柏属。常绿乔木或灌木。生长较慢,树高可达10米;树冠塔形或圆柱形。喜光,耐干旱、寒冷气候。常分布于石灰岩山地或石灰岩形成的栗钙土或黄土上与油松等混生。 分布于东北、华北各地,西至陕西、甘肃、宁夏等省区。东北分布在海拔500米以下;华北、西北在海拔1400—2200米地带,张家口地区的涿鹿、崇礼、赤诚、尚义和康保等县均有片状零星分布。康保县屯垦乡的白塔沟至照阳河乡的孔督沟均有分布,1960
Jun Song, also known as just loose, holding a few pine, is a Boke, cypress cypress. Evergreen trees or shrubs. Slow growth, tree height up to 10 meters; canopy tower or cylindrical. Hi light, drought-resistant, cold climate. Often distributed in the limestone mountain or limestone formed on the chestnut soil or loess and pine mixed. Distributed in the northeast and north China all over the west to Shaanxi, Gansu, Ningxia and other provinces. Northeast distribution at an elevation of 500 meters below; north, northwest in the 1400-2200 meters above sea level, Zhangjiakou area Zhuolu, Chongli, sincere, Shangyi and Kang Bao and other counties are flaky sporadic distribution. Baotou Ditch in Tunken Township, Kangbao County, and Kongdou Ditch in Zhaoyanghe Township, 1960