裂果率高是制约脐橙发展的重要因素，减少裂果已成为脐橙生产急待解决的技术问题。为此，我们对脐橙裂果规律进行探索，并用中国柑橘研究所研制生产的FOWS（植物生理活性剂又名抑黄酯）涂果和叶面喷布K、P、Ca肥控制脐橙裂果取得了良好效果。现将试验结果总结如下：1材料与方法 Crack fruit rate is an important factor restricting the development of navel orange, reduce the fruit has become navel orange production urgent solution to technical problems. To this end, we explored the law of the cleavage of navel orange and made good use of FOWS (phytoremediation agent) and foliar spray K, P, Ca fertilizer to control the cleavage of navel orange effect. Now the test results are summarized as follows: 1 Materials and methods