Prof. Jia is mainly engaged in the research work related to the physiology and molecular regulation of cold-region Japonica rice cultivation under low-temperature stress, and has carried out relevant research work in the aspects of low-temperature stress in different reproductive periods on cold-region Japonica growth and development, yield formation, nitrogen metabolism, nitrogen formation and accumulation, and nitrogen metabolism molecular response mechanism, as well as the regulatory effect of exogenous substances on nitrogen metabolism of cold-region Japonica rice under low-temperature stress. She has presided over one national scientific research project, six provincial and ministerial scientific research projects, and participated in three national projects and one provincial and ministerial project. She has published 12 SCI papers as the first or corresponding author.She has authorized 1 invention patent as the first complete author, and validated 7 new rice varieties.