陇中黄土丘陵区生态环境退化与恢复重建调控机理

陇中黄土丘陵区生态环境脆弱,历史时期人为活动强烈,导致生态环境退化与农牧交替频繁.应用系统论分析该生态经济系统的稳定性,用反馈控制原理分析该生态环境系统的运行机制和调控机理,并提出该区生态环境恢复重建的途径与措施,为该区生态环境建设和农牧业发展提供科学依据.

The Mechanism Study of a Recovering and Rebuilding of Ecological Environment Degeneration on the Ecological System in Longzhong Loess Hilly Region

Nongzhong loess hilly region is a brittleness ecology environment with a sparse vegetation cover and severe soil erosion. A plunder managing and an irrational land use constraint the development of agriculture and animal husbandry in the area. Because an intense human activity effect in the region, where the variances of an ecology environment and the alternation changes of agriculture and animal husbandry were occurred frequency in historical. The stability of a brittleness ecology system in the region were analyzed with a system theory, and the run mechanism and the control mechanisms of degradation and rebuilt for the fragility ecology system in the region were discussed by a theories of a systemic dynamics and a feedback control. Based on the analyses of the feedback control of the ecology economic system, a control way and adjusted measures on resuming and rebuilding of the firmly ecology environment are presented, it gives a science gist to promote the ecology environment construction and the continuance development of agriculture and animal husbandry in the region.