密植、衰老、疏于管理,是造成柑桔园低产的主要原因。目前,三峡库区尚有较多的密植衰老低产柑桔园亟待改良。为此,我们针对三峡库区柑桔低产园的具体情况,开展了柑桔低产园改造技术及效益研究工作。现将结果报道如下。1　材料与方法试验在重庆市开县临江镇复呈枳砧佛罗斯特脐橙 Close planting, aging, lack of management, is the main reason for the low yield of citrus orchards. At present, there are still many densely populated and deciduous low-yield citrus orchards in the Three Gorges reservoir area to be improved urgently. To this end, we targeted the specific conditions of the low-yielding citrus in the Three Gorges Reservoir Area and carried out the research on the technology and benefits of the low-yielding citrus plantation. The results are reported below. 1 Materials and Methods Test Kaiqing County in Chongqing Linjiang Zhen Fusheng Fuming orange navel orange