【摘要】 黄土丘陵区固原上黄试验区近20年(1986-2005)来农业生态经济系统演变过程可划分为三个阶段:第Ⅰ阶段(1986-1999)、第Ⅱ阶段(1999-2002)、第Ⅲ阶段(2002-2005)。在对农业生态经济系统演变三个阶段的特征及互动过程分析的基础上,利用通径分析方法探讨了各个阶段的驱动力。第Ⅰ阶段:提高单产是主要驱动力;第Ⅱ阶段:退耕还林还草是主要驱动力;第Ⅲ阶段:经济利益是主要驱动力。更多还原

【Abstract】 Agricultural eco-economic system evolutionary process can be divided into three stages at Shanghuang experimental area of the Loess Plateau in the recent twenty years(1986-2005):The first stage(1986-1999),The second stage(1999-2002),and the third stage(2002-2005).Based on the analysis of the character and interaction process of the three stages of the development of the agricultural eco-economic system,using the Tongjing analysis this paper disscussed the driving force of each stage.Improving yield is the main driving force for the first stage;Turning slope cropland into woodland and grassland is the main driving force for the second stage;And enhancing economic benefit is the main force for the third stage.更多还原