Analysis of the integrated ecosystem of farming，forestry and animal husbandary in Kaifeng sandy experimental region

Three functions of bio-production，energy flow and material cycling are discussed based on analysis of the basic resouroes，characters of davelopment，composition and structure of the integrated eco-system of Kaifeng sandy experimental region．Results show that the system’s bio-productivity is increasing，and energy flow is becoming more optimum，while ratio of materia1 OUtput to input should be improved，and K deficiency is still very serious．