前言由于樟子松具有耐干旱瘠薄、生长迅速、对病虫危害抵抗能力较强的特点,防风阻沙作用强已成为风沙、干旱、瘠薄地区广大人民群众贯彻毛主席“绿化祖国”伟大号召的一种颇有前途的造林树种。但其种源缺乏,目前只限于黑龙江省大兴安岭山地及海拉尔一带沙地。所产种子远远满足不了造林事业日益增长的需要。近年来,特别是无产阶级文化大革命以来,为了扩大种源掀起了把樟子松各种林分改建、扩建成为种子林的高潮。林木的开花结实、种子产量多寡、营养条件是主要因素之一。因此只有经常采取一定数量的施肥和高度农业技术措施,才能获得稳产高产。就中外文献所载,无论为林木生长或为促进结实,世界各国家都进行了各种林地施肥试验。我国随着社会主义的经济 Introduction Because of its drought resistance, infertility growth, rapid pest resistance and strong resistance to pests and diseases, strong windbreak and sand resistance has become the great call of Chairman Mao’s “greening the motherland” by the broad masses of people in windy, dry and barren areas. A promising afforestation species. However, the lack of provenances is limited to the Daxinganling Mountains and the sandy land in Hailar, Heilongjiang Province. The seeds produced far can not meet the growing needs of afforestation. In recent years, especially since the Great Proletarian Cultural Revolution, in order to expand the provenance, the climax of rebuilding and expanding the various stands of Pinus sylvestris var. Forest flowering and fruiting, the amount of seed yield, nutrition is one of the main factors. Therefore, only a certain amount of fertilization and high degree of agricultural technology are often taken in order to achieve stable and high yield. As far as Chinese and foreign literature are concerned, no matter for the growth of trees or for the promotion of robustness, various countries have carried out various fertilization experiments on woodland. Our country follows the socialist economy