Introduction

Since B.N. Wernazky proposed the concept of biogeochemistry in 1934, this discipline has been developing slowly. But in the 20th century, 70 years after the emergence of ecological problems in human society. In many scientific exploration, biological geochemistry meteoric rise, with its simple but profound philosophical thinking, the ecological environment quickly. The greatest contribution of biogeochemistry to contemporary ecological environment research is to establish a biogeochemical model of ecosystems. The biogeochemical model recurses the migration of chemical elements in time and space, connecting the elements of the ecosystem (climate, soil, vegetation, human activity, etc.) into a whole that is intrinsically linked. When any of the environmental elements change, the whole system will react. When any of the environmental elements change, the whole system will react. By predicting these reactions (such as grain yield, water eutrophication, greenhouse gas emissions, etc.), the biogeochemical model is playing an increasingly important contribution to the understanding and solution of contemporary human ecological and environmental problems (Global climate change, food security, water balance). The establishment of this course (Introduction and Application of Biogeochemistry) is to introduce this scientific frontier to undergraduates and graduate students.