柑桔小老树是指柑桔在定植以后因种种因素致使植株不能正常生长发育、开花结果,而过早衰老,迟迟没有经济效益的树。作为全国柑桔商品基地之一的贵州罗甸县,在1983年种植的1300亩柑桔中。小老树占40％。因此,尽快改造小老树,增大投产面积,提高果实产量和品质,具有十分重要的 Citrus small old tree refers to the citrus after planting due to various factors that can not be normal growth and development of plants, flowering, premature aging, there is no economic benefits of the tree. Luodian County, Guizhou Province, one of the citrus commodity bases in the country, is among 1,300 mu of citrus grown in 1983. Small trees account for 40%. Therefore, as soon as possible to transform small old trees, increase production area, improve fruit yield and quality, it is very important