Abstract: Based on the average values of observed meteorological data of 81 stations from 1961 to 2003 in Heilongjiang Province,the climate productivities of Pinus koraiensis and Larix gmelini forests in Heilongjiang Province were calculated.The spatial distribution of the productivity change trends in last 43 years was analyzed.The results showed that Yichun forest region of Xiaoxing'anling,Heihe region and Mudanjiang region were the key dominant regions for main forest types in Heilongjiang Province,while the middle and southern Daxing'anling region was the subordinate dominant regions with an increasing potential on climate productivity.

Key words: Heilongjiang Province, Heilongjiang Province, Main forest types, Climate Productivity, Trend, Pinus koraiensis, Larix gmelini