对桂味荔枝进行氮、钾肥效试验的结果表明：在施磷基础上，荔枝施用氮、钾肥料对提高树体营养水平、促进秋梢生长发育、提高成穗率、座果率和果实产量均有较显著效果。在施磷量相等的条件下氮、钾平衡配施的效果最好，增产达极显著水平。提出成年桂味荔枝较适宜的施肥量：每５０ｋｇ挂果树面年施Ｎ０．８４ｋｇ、Ｐ２Ｏ５０．５ｋｇ、Ｋ２Ｏ１．２ｋｇ；１２月份秋梢叶片老熟期适宜的氮、磷、钾含量分别为Ｎ１．６０％—１．７５％、Ｐ２Ｏ５０．２５％—０．３２％、Ｋ２Ｏ０．６５％—０．９５％。 The results showed that applying nitrogen and potassium fertilizers to litchi increased the nutrition level of tree, promoted the growth and development of autumn shoots, increased the rate of ear formation, fruit setting rate and fruit yield Have more significant effect. Under the condition of equal phosphorus application, the best combination of nitrogen and potassium is the best, and the yield increase reaches the extremely significant level. The suitable fertilization amount of adult litchi was given: N0.84kg, P2O50.5kg and K2O1.2kg per 50kg of hanging tree; N, P, K contents of autumn mature leaves in December were N1, N and P respectively. 60% -1.75%, P2O50.25% -0.32%, K2O 0.65% -0.95%.