RESUMO
The coupling relations between ecological supporting capability [F(x)] and socioeconomic situation [F(y)] of west Jilin Province from 1986 to 2004 were analyzed by harmonious development model and scissor difference method. The results showed that in study period, the F(x) of west Jilin Province had a trend of decreasing first and slightly increasing then, while F(y) had an overall exponential increase. Influenced by natural and anthropogenic factors, both F(x) and F(y) had obvious vulnerability. The scissor difference cx between F(x) and F(y) declined from 4.93 degrees in 1986 to 0.28 degrees in 1996, and then increased to 12.30 degrees in 2004. During the period of 1995 -2004, west Jilin Province gradually changed its traditional manner, i.e., from increasing F(y) with the rapid degradation of F(x) to the harmonious development of both F(x) and F(y), and the coupling degree of F(x) and F(y) changed from elementary or critical inharmonious to barley or elementary harmonious. After 1995, the scissor difference alpha increased with higher velocity, and the harmonious degree C also fluctuated obviously, illustrating an intensive antagonism between F(x) and F(y). The study area was in the erupting period of various ecological problems, and at present, the high instability of elementary harmonious status still existed. Comparing with harmonious development model alone, its combination with scissor difference method could reveal the coupling relations of F(x) and F(y) from the perspectives of development status and changing rate. This combination could reflect not only the equilibrium status but also the conflict intensity between F(x) and F(y), and give more comprehensive and profound analysis on the coupling relations between F(x) and F(y).