Abstract: "The normal arecanut leaves of Hainan and the ones with yellow leaf disease were chosen as the experimental materials.By combination of a field investigation and laboratory to analyze the content dynamic of trace elements(such as Cu,Zn,B,Mo,Fe,Mn)of the normal arecanut leaves of Hainan in different yield level and different growth years and the ones with yellow leaf disease.The results of study showed that the Cu content of the arecanut leaves in middle-high yield group(MHYG) was the lowest,and that of the arecanut leaves in low yield group(LYG) was the highest,and higher than those of middle and high yield group(MYG and HYG),but the difference among them was not significant.The Cu content of arecanut leaves with yellow leaf disease was high than those of the normal fruit-bearing arecanut.The Zn,B,Mo,Fe,Mn contents of the arecanut leaves in low yield group were 47.7%,22.5%,49.0%,40.8% and 58.8% lower than those of f the arecanut leaves in high yield group.The Zn B,Mo,Fe,Mn contents of the arecanut leaves with yellow leaf disease were lower than those of high yield group,with 44.8%,30.6%,54.4%,50.9%,and 62.6% decrease,respectively,and lower than those of low yield group,with 5.5%,10.4%,10.7%,17.0% and 9.2%,respectively.The Cu content of arecanut leaves in high yield group and middle-high yield group decreased with the growth years,but the difference between them was not significant,and the Cu content of leaves in middle yield group showed no a linear trend.The Zn,Mn,Fe contents of arecanut leaves in different yield group showed a decrease trend with the growth years,but had no significant difference.The B,Mo contents of arecanut leaves among different yield levels had no significant difference,and had no distinct linear change trend with the growth ages increasing. "

Key words: Aracanut leaves, Trace element, Yield level, Growth years

CLC Number: 

• S567.19

• S435.671