近二年来，柑桔产销矛盾突出，售价下降，严重影响了果农经济效益，为了尽快克服产销矛盾，开展柑桔品种结构调整，发展优良品种已成为当前柑桔生产中的工作重点；脐橙果大、质优、市场售价高，是广大果农首选的换代品种。笔者经１０余年对脐橙生长与结果习性观察，作如下... In the past two years, the contradiction between the production and marketing of citrus has become prominent and the selling price has dropped. This has seriously affected the economic benefits of fruit growers. In order to overcome the contradiction between production and marketing as soon as possible, the structural adjustment of citrus varieties and the development of fine varieties have become the focus of current citrus production. Large, high quality, high market price, the majority of farmers is the preferred replacement varieties. The author after more than 10 years of growth and the results of navel observation, as follows ...