中国北方地区主要树木的气候生产力研究

该文根据作物生长的Logistic曲线推导出了计算森林气候生产力的模式 ,利用该模式计算了我国北方地区 1 0种主要树木的气候生产力 ,结果表明 :热量条件好的地区 ,树木的成熟年龄短 ,热量条件差的地区 ,树木的成熟年龄长。水分条件好的地区 ,树木的材积量大 ,而水分条件差的地区 ,树木的材积量小。影响该区树木生长的主要因素是干旱。同时指出 ,在北方地区发展林业生产时应根据当地的气候特点和林业生产目的选择相应的树种

CLIMATIC PRODUCTIVITY OF MAIN TREE SPECIES IN NORTH REGION OF CHINA

Based on the Logistic curve, a model to calculate the tree climatic productivity was established. By employing this model, the climatic productivity of tree species in north region of China was calculated. The results showed that the tree quantitative maturity age was shortened in a good thermal region; while in a bad thermal region the quantitative maturity age was longer. The volume increment of tree species is greater in a good water region than that in a bad water region. The main factor impacting the tree growth within the north region of China is drought. Furthermore, it is argued that to develop forest production in northern China, it is necessary to select relevant trees accordant with the climate characteristic and the purpose of forest production.