甘肃河西地区酒泉荒漠绿洲农业生态系统及其调控

Agricultural Ecosystem and Adjustment Measures in Desert—oasis in Jiuquan, Gansu Province

绿洲农业是在荒漠环境下人为控制的生态系统,具有生态结构简单、生态系统脆弱、稳定性差等特点。本文运用系统论、耗散结构理论及生态学的基本原理,对酒泉绿洲农业生态系统的结构和功能进行了分析,提出了以水定地,解决水土平衡问题,促使水盐动态的协调。制定了合理的灌溉定额及其保护和发展林草植被的调控措施。

Oasis agriculture is a man—controlled ecosystem in the desert environment. It has a simple ecological structure, fragile ecosystem and weak stability. This paper analyses the structures and functions of agro—ecosystem in Oasis by using the system theory , dissipative structural theory and ecological theory and puts f orword the following adjustment measures: Developing Oasis according to water volume in order to reach the balance between water and land; promoting a dynamic equilibrium between water and salt: working out a irrigation quota as well as conserving and developing forestry and grasses.