Abstract: The climate-soil potential productivities for maize,rice and soybean in Heilongjiang Province were calculated,by using the mechanism methodology and Analytic Hierarchy Process (AHP)models. The climate potential productivity and climate-soil potential productivity of were computed according to the factors,such as radiation,temperature,precipitation,and soil in each county. The characteristics of numerical distribution and spatial distribution of two kinds of potential productivity in black soil region were analyzed through classification statistics and classification mapping. The results showed that the climate potential productivity for maize,rice and soybean was 6939-14241kg/ha,10720-18079kg/ha and 1947-3989kg/ha respectively. The climate-soil potential productivity for maize,rice and soybean was 3513-12346kg/ha,4465-15505kg/ha and 1032-3553kg/ha respectively. The spatial distribution of the productivities was similar to temperature and precipitation with the trend decreased from south to north. Compared with the results from twice soil surveys,the soil fertility was on descending trend. So climate-soil potential productivity also decreased. The soil fertility was important for the climate-soil potential productivity,especially in the poor soil fertility regions,where the soil fertility had greater influences on climate-soil potential productivity.

Key words: Climate productivity, Climate productivity, Climate-soil productivity, Black soil region of Heilongjiang Province