Abstract:

The land ecological safety research is a forefront topic of current land sustainable use research.In order to guarantee the land ecological safety,the prewarning of land ecological safety system should be studied.Combined with the theory of prewarning,the paper established the index system of land ecological safety prewarning from perspectives of pressure,state and respond,and carried out the study on the land ecological safety alarm in Poyang Lake Ecoeconomic Zone from the year 2001 to 2008 by using the matterelement model.The results showed that the land safety alarm state of Poyang Lake Ecoeconomic Zone was light warning in 2001.From 2002 until 2004,the level decreased to medium warning,while the level from 2005 to 2006 degraded to heavy warning.From 2007 to 2008,the level returned to medium warning,which indicated a better safety status.The research indicated that matterelement model bears the advantages of simple calculation, clear indication and higher accuracy, providing another tool for researching regional land ecological safety prewarning