Field experiment was carried to study dynamic distribution of fertilizer N in rubber latex under Ethrel stimulation with15 N isotope tracing technique at early stage of the year. The results showed that fertilizer N could be determined at 26 d after fertilization. The abundance of15 N gradually increased as time went on whether for stimulation treatment or conventional treatment. The increment of15 N abundance was significantly higher under stimulation tapping than that under conventional tapping over time....