【摘要】 研究认为科尔沁沙地针叶树育苗适于排水良好的沙质、中性或微酸性土壤 ,p H值为 6.5 -7.0 ,不超过7.5 ,粘重土质或 p H值超过 7.5都不适宜。圃地使用草炭或河泥改良土壤 ,针叶树苗期管理的重点是防治立枯病 ;留床切根育苗可提高苗木质量 ,降低育苗成本 ;提高针叶树造林成活率的关键是使苗木根系保持湿润 ,不被风干。采用容器苗造林可以提高造林成活率 ;幼树越冬 ,埋土防寒 ,可提高幼林保存率 1 0 %左右。引种针叶树 ,增加新造林树种 ;提高针叶树造林技术 ,改善樟子松林的生长状况 ,防治枯梢病等对加强科尔沁沙地造林具有重要意义更多还原

【Abstract】 In Keerqin sandy land, cultivating seedlings of needleleaved trees is suitable to sandy, neutral or slightly arid soil with good drainage and pH value between 6.5 ~ 7.0, no more than 7.5, which is unsuitable to clay soil or pH value over 7.5. The nursery uses soddy soil or improved soil of canal mud. The emphasis of nursery period management of needleleaved is to control seedling blight. Cultivating seedling by cutting root can raise seedling quality and reduce seedling cost. The key to increase survival rate of afforestaion of needleleaved trees is to keep root system humid. Container seedling can raise survival rate of afforestation. Banking up to prevent cold for young tree overwintering can increase preserved rate of young trees by 10%. It has important significance to strengthen afforestation in Keerqin sandy land to introduce needleleaved trees, increase tree species for afforestation, improve afforestaion technology of needleleaved tree, improve growing situation of Pinus sylvestris var. mongolica Litv. forest and control spike top.更多还原