沙地樟子松人工林结实及影响因素研究

Seed Setting and Influencing Factors of Pinus sylvestris var.mongolica Plantation in Sandy Land

樟子松具有抗逆性强、生长迅速、材质优良等特性,是呼伦贝尔地区乡土先锋树种,也是呼伦贝尔沙区乔木造林主要树种之一,将樟子松人工林改建成母树林是尽快提高樟子松种子产量的最有效方法,为此,对沙地樟子松人工林结实及影响因素进行研究。结果表明,沙地樟子松人工林结实量与林龄关系密切,随林龄增长其结实株率和结实量逐渐增加;林分密度对沙地樟子松结实量影响较大,适宜的林分密度能有效提高沙地樟子松林分结实量;采用施肥措施可以不同程度地提高沙地樟子松种子产量与质量。

Pinus sylvestris var.mongolica which has the characteristics of strong stress resistance,rapid growth and excellent material is not only the local pioneer tree species in Hulunbuir area,but also one of the main tree species for afforestation in Hulunbuir sandy area.The reconstruction of plantation into seed production stand is the most effective way to improve the seed yield of Pinus sylvestris var.mongolica as soon as possible.Therefore,the seed setting and influencing factors of Pinus sylvestris var.mongolica plantation in sandy land were studied.The results showed that the seed setting amount was closely related to the forest age,and the seed setting rate and amount increased gradually with the growth of forest age;the stand density had a great influence on the seed setting,and the appropriate stand density could effectively improve the seed setting;fertilization measures could improve the seed yield and quality of Pinus sylvestris var.mongolica in sandy land.