摘要
通过对2005.10.1～2006.4.30非生长季寒温带兴安落叶松原始林气象要素分析发现,在非生长季期间,兴安落叶松林的气温最低可达-40℃以下,大气湿度却能够始终保持在50%以上,最高可达90%以上;土壤温度的变化随土壤深度的增加而减小,在1月底到2月初土壤温度达到最低值,但也只有-12℃左右;原始林林内积雪从11月份初开始不断增加,最高达18 cm,到次年4月末基本融化。分析表明：在寒温带兴安落叶松森林生态系统中,低温、高湿、稳定的土壤温度和深厚的积雪可能是非生长季兴安落叶松获得生理需要所必需的水分和其它营养元素,以维持非生长季微弱得水分代谢的基本途径之一,是兴安落叶松在极端恶劣的气候环境下能够良好生长的基本环境保证。这一分析,可以为研究兴安落叶松林生态系统的存在和发展提供基本的科学假设。
Through the analysis of forestry meteorological factors of the dahurian larch （ Larix gmelinii） forest in non, ZHOU MeiI ,cropping season （from October 1, 2005 to April 30, 2006） in Cold, ZHOU MeiI ,temperate Zone, it was found that, in the non, ZHOU MeiI ,cropping season of daburian larch （ Larix gmelinii） ： the lowest air temperature can reach below -40＇（], but the forestry air moisture can maintain above 50% , and its highest can be above 90% ; the change scope of soil temperature will be smaller with the soil deeper, and in late January and early February the soil temperature will reach the lowest, about - 12~C ; from the early November, the snow quantity keep increasing, the maximum depth can reach 18cm, it will be thawed until next April. These observa- tions indicate that, in the forest ecosystem of dahurian larch （Larix gmelinii） in Cold - temperate Zone, low temperature, high moisture, stable soil temperature and deep snow maybe the guarantee of daburian larch （ Larix gmelinii） obtaining water and other nutrients physiologically needed, it was one of the essential ways to maintain weak water metabolism in non - cropping season, which ensures daburian larch （Larix gmelinii） get through the extreme climatic conditions. This study can provide basic scientific hypothesis for the research of existence and development of daburian larch （ Larix gmelinii） forest ecosystem.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2007年第4期79-84,共6页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
国家林业局"十五"重点项目(2001-01)
国家自然科学基金重大项目(30590381-03)
关键词
兴安落叶松
森林生态系统
气象要素
Dahurian larch （Larix gmelinii）
Forest ecosystems
Meteorological elements
