Abstract:

This paper dealt with variation of chemical elements and relationship between the elements in various vegetation types and plant life forms of Hainan Province,based on the analysis of 15 elements in plant leaves of 80 species.The results showed that:there were big ranges of element concentrations in plant leaves among the species or elements.The vegetation types and plant life forms had the obvious effects on element concentrations in plant leaves.N/P ratios were small for most vegetation types of Hainan Province.This indicated that N concentration was a major limited factor for plant growth.It was pointed out by the analysis of element ratios and correlation coefficients that plants had relatively constant composition and coordinated relationship for necessary nutrient elements.

Key words: Tropical plant, Leaves, Chemical elements, Hainan Province