中文摘要：

基于县域单元维度，对珠江三角洲地区进行主体功能区划基础上的土地利用效益综合评价研究。结果表明：①珠江三角洲地区土地利用综合效益总体水平较高，但内部空间差异较明显；②不同主体功能区之间和同一主体功能区内部土地利用的经济效益、社会效益和生态效益存在不均衡现象；③各功能区内部影响土地利用效益提升的障碍因素有所不同，优化开发区主要是生态因素，农产品主产区主要是经济和社会因素，重点开发区主要是经济和生态因素。

英文摘要：

This paper analyzed the relations between land use efficiency and main functional zones in Pearl River Delta which based on county level. The results showed that：①Land use efficiency in Pearl River Delta was in high level overall, but its internal spatial differences was significant. ②Benefits of economic, social and ecological were disharmony not only at the different main functional zones but also at the same zones. ③The obsta- cles to improve land use efficiency were not the same, the key factors in optimized development zone were ecological elements, and the obstacles factors of main agricultural product zone were social and economic causes, however its factors were economic and ecological in focal development zones.