This paper investigated and analyzed geographic location and climatic factors of the four major natural distribution areas in the three Northeastern Provinces. Meanwhile,compared and analyzed the phenotype characters and starch content of Quercus mongolica seeds of the four areas by means of variance analysis,Duncan's multiple comparisons and correlation analysis. The results showed that Q. mongolica in Dailing of Heilongjiang Province has good quality sources. The greater the seed length,the heavier the fr...