我场位于山东半岛南部,地处黄海岸边的冲积砂滩上,场内自地表到地下二十多公尺都是粗细交替的砂砾,建场前仅有几棵散生的赤松,病虫害重,生长不良。建场后试种过许多树种,只有黑松能抵抗海风海雾,粗粒砂及粉砂地都能生长较好,目前已形成了一条茁壮生长的黑松海防林带。但是,黑松纯林也存在着一定的缺点。在国防前沿大 My field is located in southern Shandong Peninsula, is located in the alluvial sand beach on the coast of the Yellow Sea, the field from the surface to the ground more than 20 meters are thick gravel alternating gravel, before the establishment of only a few scattered pine, pest weight , Poor growth. Many species have been planted after the establishment of the site. Only the black pine can resist sea breeze, sea fog, coarse sand and silt to grow better. At present, a strong growth of Pinus thunbergii shelterbelt has been formed. However, the pure pine forest there are some shortcomings. Forefront of national defense