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油松,又名红皮松、短叶松,为松科松属常绿乔木,是陕西省榆林市黄土高原沟壑区的主要造林树种。自三北防护林工程以来,榆林市大量营造油松人工林,已初具规模,但是由于榆林黄土沟壑区的风化、沙化、石漠化严重,形成“土多沙多,石头疙瘩到处有”的地貌特征,而且山体石灰岩大面积裸露,土层薄,荒山中又沟壑纵横,60度以上的陡坡众多,部分地段形成水分条件完全不同的小生境,加之土壤干层等众多因素,榆林地
Pinus tabulaeformis, also known as red pine, pine, Song pine Pinus is an evergreen tree, Yulin City, Shaanxi Province, the main afforestation species in the gully area. Since the Three-North Shelterbelt Project, a large number of plantations have been made in Yulin City, and the plantation has begun to take shape. However, due to the weathering, desertification and desertification in the loess gully areas of Yulin City, ", And the large area of mountain limestone exposed, thin soil, ravines in the ravines vertical and horizontal, many steep slopes above 60 degrees, part of the formation of water conditions completely different niches, combined with soil dry layer and many other factors, Yulin