欢迎访问林业科学,今天是

林业科学 ›› 1999, Vol. 35 ›› Issue (5): 22-27.

• 论文及研究报告 • 上一篇    下一篇

影响沙地樟子松天然更新的主要生态气候因子的定量分析

韩广1,张桂芳2,杨文斌3   

  1. 1. 湖南师范大学资源与环境系 长沙 410081
    2. 湖南大学土木工程系 长沙 410082
    3. 内蒙古林业科学院 呼和浩特 010010
  • 收稿日期:1998-04-13 出版日期:1999-09-25 发布日期:1999-09-25

QUANTITATIVE ANALYSIS ON PRINCIPLE ECO-CLIMATIC FACTORS OF LIMITING NATURAL REFORESTATION OF PINUS SYL VESTRIS VAR.MONGOLICA ON SANDY LAND

Guang Han1,Guifang Zhang2,Wenbin Yang3   

  1. 1. Department of Resources and Environmental Sciences, Hunan Normal University Changsha 410081
    2. Department of Civil Engineerin, Hunan University Changsha410082
    3. Forestry Academy of Inner Mongolia Huhhot 010010
  • Received:1998-04-13 Online:1999-09-25 Published:1999-09-25

摘要:

利用呼伦贝尔草原2个组8个站点的33个变量进行了逐步判别分析。结果表明,影响沙地樟子松天然更新的生态气候因子主要是极端最低气温、极端最高地温、1月蒸发量和多年平均积雪日数等4个,它们主要是通过对种子萌发和幼苗的生长发育施加限制作用。因此,在造林生产实践中应选择适宜的立地克服其消极影响,必要时应采取人工措施促使其天然更新,保障其持续稳定发展。

关键词: 沙地樟子松, 天然更新, 呼伦贝尔草原, 生态气候, 逐步判别分析

Abstract:

Stepwise discriminate analysis (SDA) was conducted using 33 variables from 8 meterological stations which are divided into 2 groups in this paper.Results show that principal limiting factors on natural forestation of P.sylvestris var.mongolica on sandy land include extremely lowest air temperature, extremely highest surface temperature, evaporation quantity in January and average days of accumulating snow for many years, which strongly influence the seed germination and the growth and development of shoots.Therefore, it is neccessary to choose suitable habitats or niches to overcome those adverse factors as mentioned above in aforestation pratice, and take effective artificial measures to promote its natural reforestation so as to guarantee their stable and sustainable development.

Key words: P.sylvestris var.mongolica on sandy land, Natural reforestation, Eco-climate, Hulun-ber Steppe, Stepwise discriminate analysis(SDA)