云南省丽江市农业生态系统协调度评价

Evaluation on Harmony Coefficient and Case Study on Agricultural Ecosystem of Lijiang

以云南省丽江市农业生态系统为研究对象,根据农业生态系统特征将其划分为生态、经济和社会三个子系统,建立了关于该农业系统协调度的评价指标范畴,从系统指标体系中选取了19个代表性指标进行了实证研究。结果表明,该地区农业生态系统协调度在1998年—2007年间呈现上升趋势。1998年—2004年,系统呈现失调状态,协调等级在4级以下,2005年—2007年呈现弱度协调,协调等级为5级;系统的协调性主要受生态子系统和经济子系统的影响,在2004年之后,经济子系统和生态子系统的协调度与社会子系统的协调度的绝对值之差减小,农业生态系统由失调状态向协调状态发展。由此可知,经济与生态的协调是农业生态系统协调发展的核心。

The research object is the agricultural ecosystems in Lijiang City of Yunnan Province, according to agrieuhural ecosystem characteristics, it could be divided into three subsystems： ecological subsystems, economic subsystems and social subsystems, and establishes the agricultural systems on the coordination degree of the evaluation index category. From the system of indicators the system, it selects 19 representative indicators of the case study. The result shows that the agricultural ecosystem is ascending trend from 1998 to 2007. RHC is below 5 and HC is feeble maladjustment from 1998 to 2004, RHC is 5 and HC is feeble harmony from 2005 to 2007 ; HC of agricultural ecosystem is influenced by ecological subsystem and economic subsystem. After 2004, the differences between ecological subsystem and economic subsystem are narrowing. The agricultural ecosystem is developing from maladjustment to harmony. Therefore, the core of the agricultural ecosystem development is the relationship between economic benefit and ecological benefit.