Abstract: This paper studied the effects of Lantana camera fresh leaves aqueous extract and its contained phenolic compounds on the growth and physiologic-biochemical indexes of Eichhornia crassipes. The results showed that this extract had obvious inhibitory effects on the growth and development of E. crassipes. When the concentration was higher than 30 g FW·L^-1, it could kill E. crassipes after 6 days treatment. A total of seven phenolic compounds in the abstract were identified by HPLC, which were salicylic acid, gentisic acid， β-resorcylic acid，coumarin，ferulic acid, p-hydroxybenzoic acid and 6-methyl coumarin，with the concentrations being,50.95，13.46,5.28,3.36,2.92,2.19 and 0.34 mg·L^-1, respectively. The mixture of the seven compounds had the strongest inhibitory effect, followed by salicylic acid, 6-methyl coumarin, coumarin, and p-hyroxybenzoic acid, while the effects of β-resorcylic acid and gentisic acid were not significant.

Key words: Nature reserve, Buffer zone, Analytic Hierarchy Process