Seedling raising experiment of Pinus armandii was conducted in Liupan mountains.Data were collected and compared and effective technique for raising seedlings were summarized.

Based on biological characters of hawkthorn,experiments on its introduction into Jinyuan were carried out under difference condition.Successful experiences and measures were summarized for follow-up actions.

樟子松为常绿乔木,树高达30 m,胸径达1m,树冠呈广卵形,叶二针一束,粗硬稍扁,树干通直,材质优良,树姿秀丽,且根系发达,可塑性强,适应性广.是防风固沙,保持水土,美化环境和用材兼优的树种.地处六盘山外围的泾源县是宁夏的生态旅游县,营林生产要求以营造生态景观林为主,樟子松是较为理想的景观树种.樟子松原产在大兴安岭林区、呼仑贝尔盟草原一带的沙土草原上.从六盘山地区和其原产地的气候特点及立地条件相比较,有发展樟子松的潜力.特别是它能耐零下40℃的低温,耐寒、耐旱、适应性强,在多种类型的土壤上均能生长,这些特性给本地引种试验提供了一定的依据.通过苗期阶段和造林以后幼林生长的观察分析和对照,我们认为,樟子松在本地区具有较为广泛适应性,并掌握了苗期和幼林期生产技术措施,现将试验结果简述于后.