内蒙古武川县耕地资源可持续利用的景观生态评价

Landscape ecological evaluation on the land resources sustainable use in Wuchuan county,Inner Mongolia

将景观生态学原理与方法和土地可持续利用目标相结合,利用2000-2005年遥感影像(TM)数据,从景观生产力、景观胁迫度与景观稳定性3方面构建武川县耕地可持续性的景观生态评价指标体系,进而对武川县耕地资源利用的可持续性进行评价和分析。结果表明:2000-2005年武川县耕地可持续利用程度指数为0.01,总体上处于平稳趋势,西部耕地可持续利用程度大于东部地区;武川县耕地资源的可持续利用综合指数的空间变化明显,在8个乡镇中,综合指数增加的有西乌兰不浪镇、得胜沟乡、大青山乡、哈拉和少乡4个乡镇,其指数增加值分别是0.2617、0.1586、0.0953、0.0685;可镇、哈乐镇、上秃亥乡、二份子乡的权重在减少,减少值为0.3820、0.1203、0.0489、0.0328;耕地可持续利用程度区域差异显著,主要表现为城镇化较高的乡镇耕地可持续利用程度减弱,城镇化较低、生态环境有所改善的乡镇可持续利用程度增强。由此认为武川县耕地资源仍然处于可持续利用状态,城镇化和生态环境变化是制约和促进武川县耕地可持续利用的重要因素。

The Wuchuan county of Inner Mongolia was chosen as a study region. With remote sensing dates （TM） in 2000 - 2005, according to the principles of systemic comprehensiveness, regional dominance, dynamic variability, landscape ecology, scientific validity and feasibility, the sustainable use of farm land was evaluated. The results showed during 2000 -2005 sustainable degree of cultivated land utilization index was 0.01 ; Spatial variation was obvious, the composite indexes of Xiwulanbulang town, Deshenggou town, Daqing mountain town, Halaheshao town increased by 0. 2617, 0. 1586, 0. 0953,0.0685 respectively; But the weights of Kekeyilegeng town, Hale town, Shangtuhai town, Erfenzi town reduced by 0. 3820, 0. 1203, 0. 0489, 0. 0328 respectively. Regional differences was significant, mainly reflected in＇ the area with high degree of urbanization. The township with lower urbanization and the improved ecological environment was enhanced. In Wuchuan County the arable land resources were still in the state of sustainable use; Urbanization and the ecological environment was the important factor which constrained or the promoted the sustainable land use in Wuchuan County.