Climate Variation and Its Influence on the Cold Tolerance and Phenology Periods of Pear Cultivars in Jilin, China

This study primarily analyzed the response of cold tolerance and phenology periods four pear cultivars to climate differences in central (Gongzhuling) eastern (Longjing) Jilin, which could provide a theoretical basis for regional division cultivation. It showed that there was significant difference same between two regions. Soluble sugar soluble starch contents are most important physiological indicators determine Gongzhuling is stronger than Longjing. In phenology, only cessation terminal shoot extension growing season length were significantly related their starch. Furthermore, gray correlation analysis identified district’s effective accumulated temperature as key meteorological factors affecting extension. The precipitation another major factor length. Therefore, this study, influence main district on cultivars, decided different accumulation starch, eventually lead cultivar