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以２２年生兰竹荔枝为试验材料，设４个施Ｎ水平（ｋｇ株－１）：Ｎ１０．２５，Ｎ２０．５，Ｎ３０．８，Ｎ４１．２．试验结果表明：Ｎ１至Ｎ３处理内，随着施Ｎ量的增加氨基酸含量也增加，而Ｎ４处理氨基酸含量反而降低．施Ｎ量对各种氨基酸含量也有影响，但表现不一样．随着施Ｎ量增加含量升高的有缬氨酸、苯丙氨酸；丝氨酸、酪氨酸和组氨酸，以Ｎ２处理的含量最高；其余的各种氨基酸都以Ｎ３处理的含量最高，Ｎ４处理的含量反而降低．各种氨基酸与施Ｎ量的相关性都不显著；施Ｎ量与总花量和雄花量呈显著正相关，与雌花／总花量比值呈极显著负相关．各种氨基酸中，缬氨酸、苯丙氨酸和精氨酸与总花量呈显著正相关，其余的相关性不显著．各种氨基酸与雌花量的相关性也不显著．
Taking 22-year-old orchid litchi as test material, four N application levels (kg strain -1) were set: N10.25, N20.5, N30.8 and N41.2. The results showed that the content of amino acid increased with the increase of N content in N1 to N3 treatment, but decreased in N4 treatment. N application of various amino acid content also have an impact, but the performance is not the same. With valine, phenylalanine, serine, tyrosine and histidine increased with the increase of N content, the content of N 2 was the highest; the other kinds of amino acids were the highest content of N 3, The content of N4 decreased instead. There was no significant correlation between the amount of amino acids and the amount of N applied. The amount of N application was positively correlated with the total amount of flowers and male flowers, and negatively correlated with the ratio of female flowers / total flowers. Among the various amino acids, valine, phenylalanine and arginine showed a significant positive correlation with the total amount of flowers, while the rest had no significant correlation. The correlation between amino acids and female flowers was not significant.