基于多目标决策灰色关联投影法的不同退耕还林模式生态效益评价

Evaluation of Ecological Benefits for Different Models of Returning Farmland to Forests Based on Multi-criteria Decision Grey Relation Projection Method

科学地评价不同退耕还林模式的生态效益对退耕还林工程的进一步实施具有重要意义。以会泽县退耕还林工程生态定位监测站数据为基础,运用多目标决策灰色关联投影法,通过对不同退耕还林模式生态效益的比较,测算出生态效益最显著的退耕还林模式。研究结果表明,退耕还林模式中乔灌草地生态效益最佳,乔、灌地次之,未退耕地生态效益最差,结果与退耕还林工程预期相一致,这说明灰色关联投影法应用于退耕还林生态效益评价的科学性与可行性。

Scientific evaluation of ecological benefits for different models of returning farmland to forests has important significant to further complete the project of returning farmland to forests.To obtain the best model of returning farmland to forests which had the greatest ecological benefits by using multi-criteria decision grey relation projection method and comparing the ecological benefits among different models of returning farmland to forests based on the data from ecological monitoring stations of Huize County.The results showed that among all of the models of returning farmland to forests,the model of tree-shrub-grass had the best ecological benefits,the model of tree-shrub had second-best ecological benefits,and the model of non-returning farmland to forests had the worst ecological benefits.Therefore,the results were in consistent with the anticipation of project of returning farmland to forests,and it proved that the grey relation projection method used for evaluating ecological benefits of returning farmland to forests was scientific and feasible.