[Method] In the test with nylon-bag method in the April of 2004,the decompositions of Manglietia hainanensis,Castanopsis fissa,Cinnamomum porrectum and Vatica hainanensis in Diaoluo mountain nature reserve of Hainan Island were studied for one year.

The sample plot investigation and stem analysis were conducted in order to study growth rhythm of 30 year old Manglietia hainanensis and to analyze the relationship between the growth and site environments.

Optimized conditions for preparation of dissolving pulp from Phyllostachys heterocyclavar were researched.

Influence of Idealist Philosophy of Song-ming Dynasties on the Theories of Zhang Nan in Yi Men Bang He;

Chemical Composition and Antibacterial Activities of the Essential Oil from the Leaves of Syzygium buxifolium;

Study on the Extraction and Antibacterial Activity in Vitro of Flavonoids from Syzygium buxifolium Leaves;

Antibacterial Activities and Total Flavonoids Determination of Alcohol Extracts from Syzygium buxifolium Seeds;

Established aseptic explant by Hydroponics of Stem Segment and Priming seeds of Photinia serru- lata Lindl,and investigated that the suitable medium of initial for Photinia serrulata Lindl shoot is MS medium su-pplemented with 6-BA 1.

Study of inter-specific correlation of Phoebe bournei communities by grey systems;

Preliminary study on the provenance test of Phoebe bournei at seedling stage;

The Allelopathic Effect of the Extracts from Castanopsis sclerophylla Leaf and Root on Seed Germination of the Phoebe bournei;