摘要
通过对我国二十几个地点的寒温性暗针叶林分布上、下限温度的统计分析,得出控制其分布和发育的最为重要的热量因子,不是最热月温度,而是稳定通过0℃和5℃的有效积温。当稳定通过0℃的月温度积温小于40℃.月或稳定通过5℃的月温度积温大于50℃.月时,寒温性暗针叶林的生长发育受到抑制。还讨论了5月、9月和5—9月均温的生态意义。
Temperature of every month on both the upper and lower bounds of sub- alpine dark conifer forests at various sites in China are estimated in terms of their distributions and temperature records,Based on these estimated data,the heat factor to influence and control the distribution and growth of sub-alpine dark conifer forests in China are discussed.It is found that the most important heat index to influence and control the distribution and growth of sub-alpine dark conifer forests is neither the mean temperaure in the warmest month,nor the maximum or minimum temperatures,but accumulated temperature of >0℃ monthly temperature or effective accumulated temperature of >5℃ monthly temperature. When accumulated temperature of >0℃ monthly temperature is more than 40℃, or effective accumulated temperature of >5℃ monthly temperature is over 50℃, sub-alpine dark conifer forests cannot grow well.When accumulated temperature of >0℃ monthly temperature is less than 30℃,or effective accumulated tempe- rature of >5℃ monthly temperature is more than 60℃,sub-alpine dark conifer forests cannot grow at all.When effective accumulated temperature of >5℃ monthly temperature is between 15℃—45℃,sub-alpine dark conifer forests in China can grow well.The ecological significance of temperature in May and September,and in summer half year are discussed.
出处
《地理科学》
CSSCI
CSCD
北大核心
1990年第2期142-149,共8页
Scientia Geographica Sinica
关键词
暗针叶林
温度
统计
寒温性
Sub-alpine dark conifer forests
Temperature
Statistical analysis
