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应用生态学报 ›› 2002, Vol. ›› Issue (3): 257-261.

• 研究论文 •    下一篇

樟子松人工固沙林天然更新障碍因子分析

曾德慧1, 尤文忠2, 范志平1, 刘明国2   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳 110016;
    2. 沈阳农业大学林学院, 沈阳 110161
  • 收稿日期:2001-08-28 修回日期:2001-10-12 出版日期:2002-03-15
  • 通讯作者: 曾德慧,男,1965年11月生,博士,研究员,主要从事防护林生态与经营、生态系统健康管理、荒漠化防治等研究,发表论文40余篇.E-mail:dehuizeng@yahoo.com.cn.
  • 基金资助:
    国家自然科学基金项目(39800117);中国科学院沈阳应用生态研究所知识创新工程重大资助项目(SCXZD010201)

Analysis of natural regeneration barriers of Pinus sylvestris varmongolica plantation on sandy land

ZENG Dehui1, YOU Wenzhong2, FAN Zhiping1, LIU Mingguo2   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016;
    2. College of Forestry, Shenyang Agricultural University, Shenyang 110161
  • Received:2001-08-28 Revised:2001-10-12 Online:2002-03-15

摘要: 采用比较分析与野外试验的方法,对沙地樟子松人工林天然更新障碍因子进行了分析.结果表明,影响天然更新的环境因子主要有郁闭度、枯枝落叶层、植被盖度和立地条件.天然更新的障碍主要是由于引种地降雪覆盖少,温度偏高等原因,使土壤蒸发大、苗木蒸腾大,造成水分的亏缺,从而导致1~2年生更新幼苗死亡.针对樟子松人工固沙林天然更新障碍及其更新特点,提出在适宜立地上采取人工促进措施,如埋土、灌水等方法,以保证天然更新有效进行.

Abstract: By employing comparison analysis,and field experiment of watering and soil covering befroe overwintering for seedlings,the barriers of natural regeneration for Mongolian pine plantations on sandy soil were identified. The experimental area was divided into 3 parts according to the state of natural regeneration. Crown closure,litter,understory coverage,and site condition were the factors which affect natural regeneration. Water deficit,but not low temperature during overwintering,is the key factor that limits survival for 1~2 years old seedlings in plantation area. The water deficit is due to higher air temperature,less accumulated snow,higher soil evaporation,higher plant transpiration in plantation area than in the area in which Mongolian pine is naturally distributed. Based on the above research,it is necessary to take effective artificial measures to promote its natural regeneration so as to guarantee its successful development. The following measures are recommended:1)covering the 1~2 years old seedlings with soil before wintering,2)irrigating seedlings before wintering,3)suitable forest harvest,e.g.,belt clear cutting,or patch cutting,4)planting the pine with broadleaf species,5)protecting forest stands from livestock grazing,seed collecting and litter gathering.

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