煤炭开采活动损坏了原生地貌和地表植被，造成了矿区及其周边环境的破坏，引起植被-土壤碳汇量减少，导致了农田生态系统碳储量的大量流失。为了量化煤炭开采对矿区农田的生态影响范围，评估矿区农田生态系统固碳损失，本研究以长河流域矿区为例，构建了一种估算煤炭开采导致农田生态系统固碳损失的方法。利用矿区数据、遥感数据、气候数据、地理数据等确定农田直接受损区和参照区，通过测算直接受损区周边归一化植被指数(NDVI)的变化趋势确定间接受损区;采用增强自适应的遥感图像时空融合方法(ESTARFM)和CASA模型计算农田植被固碳量，实地采样并测试了农田土壤有机碳;结合矿区土地利用变化计算矿区农田生态系统固碳损失量。结果表明:2000—2015年，长河流域矿区因煤炭开采导致的农田直接受损面积为5.06km2，间接受损面积为18.99km2;矿区农田植被固碳量为3936.16t/km2，土壤碳储存量为6737.05t/km2;矿区农田生态系统固碳总损失量为30737.68t，其中直接受损区固碳损失量占总损失的42.12%，间接受损区固碳损失量占总损失的57.88%，表明间接受损区也应纳入煤炭开采导致的生态破坏的评估中;煤炭开采对矿区农田生态系统固碳量的影响属于失碳效应。

Coal mining activities damage native landforms and surface vegetation and destroy the environment of mining area and its surroundings,which lead to the reduction of vegetation-soil carbon sink,and a great loss of carbon reserves in the farmland ecosystem. In order to quantify the ecological impact range of coal mining on farmland and evaluate the carbon sequestration loss of farmland ecosystem,this paper took the Changhe basin mining area as an example and es- tablished a method for estimating the carbon sequestration loss of farmland eco-system caused by coal mining. In this paper,the directly damaged area and reference area of farmland were con-firmed based on mining area data,remote sensing data,climate data and geographical data,etc. Indirect damaged area was confirmed by calculating the variation trend of normalized vegetation index (NDVI) around directly damaged area. ESTARFM and CASA models were used to calculate the carbon sequestration of farmland vegetation and the farmland soil organic carbon was sampled and test- ed. The carbon sequestration loss of farmland ecosystem was calculated based on the change of land use in the mining area. The results showed that from 2000 to 2015,the direct damage area of farmland caused by coal mining in the Changhe basin mining area was 5. 06 km2 ,and the indirect damage area was 18. 99 km2 . The carbon sequestration of vegetation in the mining farmland was 3 936. 16 t / km2 ,and the soil carbon storage was 6 737. 05 t / km2 . The total car- bon sequestration loss of the farmland ecosystem in the mining area was 30 737. 68 t,among which the carbon seques- tration loss in the directly damaged area accounted for 42. 12% of the total loss,and the carbon sequestration loss in the indirectly damaged area accounted for 57. 88% of the total loss,indicating that the indirectly damaged area should be included in the ecological damage assessment. The influence of coal mining on carbon sequestration in farmland e- cosystem belongs to a carbon loss effect.