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樟子松(Pinus sylvestris,L.var.mongolica,Litvin)天然分布在我国黑龙江省大兴安岭山地及海拉尔一带沙地。我站自1955年栽植樟子松,二十年来现已高达10米。樟子松的特点是:在其它树种不能正常生长的干旱瘠薄的沙地上能茁壮生长,适应性强,根系发达,枝叶繁茂,防风阻沙作用强,树干通直,材质良好,是我省西部和西北部地区营造防护林、用材林的主要针叶树种。良种壮苗是造林的物质基础,是提高造林质量的重要环节,就地育苗就地造林不仅可以提高造林成活率,同时也是降低造林成本的有效措施。沙地土壤的自然肥力很低,表层土壤腐植质含量不足1%,结构疏松,渗透力强,
Pinus sylvestris (L. var. Mongolica, Litvin) is naturally distributed in the Daxinganling Mountains, Heilongjiang Province and the sandy land of Hailar, Heilongjiang Province. I plant since 1955 Pinus sylvestris, 20 years has now been as high as 10 meters. Pinus sylvestris is characterized by: other species can not grow normally in arid barren sandy land can thrive, adaptability, developed roots, lush foliage, strong windbreaks and sand, trunk straight, good material, is the western part of our province And the northwestern region to create shelterbelts, timber forests of the main conifer species. Strong seeds and strong seedlings are the material basis for afforestation and an important link in improving afforestation quality. Local in situ afforestation not only increases afforestation survival rate, but also is an effective measure to reduce afforestation costs. The natural fertility of sandy soil is very low, the surface soil humus content less than 1%, loose structure, strong penetration,