摘要
本文对奈曼铁路固沙区15龄樟子松生长状况及其与生态因子的关系研究表明,在无地下水和灌溉补给的沙丘上部,樟子松高生长速生期15龄即趋于结束;而在有地下水补给的丘间低地,正值高生长旺盛时期。立地水分状况是导致该区樟子松生长差异的主要原因,在奈曼沙区樟子松在不同立地条件下生长状况依次是丘间低地>迎风坡上部>沙丘顶部,这与各立地0～200cm沙层含水量大小相一致;4月份均温、5月份降水量是该区樟子松高生长的限制因子。
Describes the relation between growth of 15-year-old P. sylvestTis var, mongolia and ecological factors in the sand-fixation area along railroad, The height growth of the pines on upper sand dune where no underground water or irrigation facilities is available tends to decline, while on lower land in between sand dunes where underground water is available the height growth of the pines showed in vigorous state. The moisture status of the sand area is the main factor that effects the of P. sylvestris var. mongolia, The mean temperature in April and the rainfall in May are also limiting factors effecting the height growth of P. sylvestris var. mongolia on Naiman Sandy-land,
出处
《西北林学院学报》
CSCD
1991年第4期16-22,共7页
Journal of Northwest Forestry University
关键词
樟子松
生长
生态因子
Pinus sylvestris var. mongolia
growth status
ecological factor
Naiman Sandy-land
