耕地利用潜力是耕地理论产能、可实现产能和实际产能3个产能层次间的差距。研究其时空分布特点及影响因素对于西部生态脆弱区耕地产能提升和粮食安全维护具有重大意义。基于农用地产能核算和2009～2011年耕地等级变化监测的外业调查成果，采用逐步回归法对达拉特旗耕地利用潜力时空分布特征及其限制因素进行研究。结果显示乡镇中吉格斯太镇的理论利用总潜力最低，昭君镇最高，呈现扩大趋势；可实现利用潜力总体呈现北部和西部高，南部和东部低，乡镇中展旦召苏木最低，昭君镇最高，呈现缩小趋势。灌溉次数、水源、侵蚀和污染状况是耕地理论利用潜力的4大限制因子，实际单产、地形、是否受灾、灌溉水源、剖面构型、机械投入和灌溉方式是可实现利用潜力的7大限制因子。%Cultivated land utilization potential is the gap between theoretical, realizable and actual ca-pacities.The researches on its temporal and spatial distribution and influencing factors are of great significance for ramp-up of arable land production capacity in the western ecological fragile areas and food security main-tenance.Based on the results of agricultural land production calculation and field survey of arable land quality monitoring from 2009 to 2011, the temporal-spatial distribution of different levels’ arable land utilization po-tential in Dalate Banner and its limiting factors were studied by stepwise regression.The total theoretical utili-zation potential in Jigesitai Town was the minimum, while that in Zhaojun Town was the highest, which showed widening trend in the study.The spatial distribution pattern of realizable utilization potential showed higher in the north and west, but lower in the south and east.The Town with the minimum and the highest realizable u-tilization potential was Zhandanzhaosumu and Zhaojun Town respectively, which showed narrowing trend.Four major limiting factors of arable land theoretical utilization potential for Dalate Banner were irrigation time, wa-ter source, erosion and pollution situation.Seven major limiting factors of the realizable utilization potential were actual yield, topography, severe weather, irrigation water source, structure of soil profiles, mechanical input and irrigation method.
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