关键词: 生态脆弱性, 经济贫困, 连片特困区, 耦合度, 耦合协调度, 胡焕庸线

Abstract: With constantly advancing construction of ecological civilization, afforestation, as an important means of land greening, is playing an increasingly important role. Afforestation efficiency exerts direct effect on the efficiency of ecological civilization construction. Based on the comprehensive verification data of national afforestation, vertical and horizontal deviation maximization method was used to calculate composite index of afforestation efficiency from 2004 to 2011 in 30 provinces of China. We further analyzed the factors influencing afforestation efficiency. The results showed that among the 30 provinces, afforestation efficiency was optimistic in nine provinces and poor in eight provinces. Geographically, efficiency in South, East and Central China was good, compared to inferior in the Northeast, North and Northwest parts. With respect to the current year qualification rate of afforestation, the greatest influencing factors were meteorological disasters, followed by site conditions. Both factors were objective factors. As for 3-year preservation of afforestation, the major influencing factors were meteorological disasters and artificial harmful interference, followed by management problems and site conditions. Effects of subjective influencing factors, including artificial harmful interference and management problems, were on the rise.

Key words: ecological vulnerability, coupling coordinated degree, contiguous destitute area, economic poverty, coupling degree, HuLine (Hu Population Line).