关键词: 土地整理, 生态评价, 地理信息系统, 评价模型

Abstract: Taking Yuyang district of Yulin city in Shaanxi province as an example,methods of ecological evaluation for land consolidation are explored using GIS combined with mathematical model in this paper.And some measures concerning land consolidation for cultivated land,woodland,grassland and unused land having different integrated ecological evaluation values are put forward.These conclusions are drawn as follows:(1)Cultivated land with ecological evaluation values varying between80and100can be classified as protected area of basic farmland,its consolidation measures should be focused on further improvement in irrigation works and crop quality;consolidation of artificial woodland should be directed at planting fruit trees and developing special fruit products of locality;and unused land can be taken as reserved resources of cultivated land for reasonable development.(2)Cultivated land with values ranging from65to80can be classified as farmland protected area and its consolidation measures can be concentrated on the design of windbreaks and soil and water conservation measures;the consolidation measures of woodland and grassland should keep them from being degradated and reasonably develop fruit trees;and the unused land could be developed into cultivated land to an appropriate way without damaging eco-environment.(3)Cultivated land with values being50～65,the consolidation measures would gradually return the cultivated land to grassland and woodland,protect original vegetation and increase vegetation coverage of the unused land.(4)Cultivated land with values of0～50,consolidation measures should be taken to return cultivated land to grassland and woodland,increase vegetation coverage of the grassland and woodland,and forbid the unused land to be turned into cultivated land.

Key words: land consolidation, ecological evaluation, model, GIS