开封沙地试验区农林牧复合生态系统分析

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

摘要: 通过分析开封沙地试验区农林牧复合生态系统基础资源、发展特点、组成与结构特征，论述了其生物生产、能量流动与物质循环三大功能。结果表明，生物生产性能不断提高，能量流动日趋优化。物质投入、产出比例尚待进一步调差，K素亏缺现象仍然严重。

Abstract: 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．