1. Nutrition Physiology: namely, the physiological functions of nutrients and the recycling of nutrients, the absorption of nutrients, the long-distance and short-distance transportation of nutrients in the body, the distribution of nutrients, etc.

2. Yield physiology: that is, to study the formation, nutrient distribution and regulation process of main crop yield.

Source-sink relationship and its role in the process of yield formation: the regulation and mechanism of yield formation were studied by using various internal and external hormones or regulators.

3. Stress physiology: that is, to study the physiological changes and adaptation mechanisms of plants under stress conditions such as drought, waterlogging, salinity, high temperature, cold, diseases and insect pests, poor ventilation, nutritional deficiency or imbalance, and tap the genetic potential of plant stress resistance through nutritional regulation.

4. Plant nutrition genetics: To study the physiological and molecular mechanisms and genetic laws of genotypic differences in mineral nutrition efficiency of different plant species and varieties, so as to screen and cultivate new plant varieties with high nutrition efficiency.

5. Plant Nutrition Ecology: Study the migration, transformation and circulation of various nutrient elements in different ecological types in PEDOSPHERE, hydrosphere, atmosphere and biosphere. Enrichment, migration and control measures of heavy metals and pollutants in the food chain, such as the nutrition mechanism in the process of ecological environment reconstruction caused by the degradation of various nutrients, and the bioremediation mechanism of polluted soil and environment.

Plant rhizosphere nutrition:

In this paper, the transformation law and biological effects of nutrients, water and other substances in the micro-domain of root-soil interface are studied: the material cycle between plants, soil, microorganisms and environmental factors, the mechanism of energy transformation and the control measures.