Study on the Landscape Spatial Pattern Evolution of Natural Forest in the Changhua Jiang Basin of Hainan Province

According to the represetive and long-term hydrology sample data in Changjiang basin,this paper analyzes the sand transporting capacity variance situation,seeks the relevance and relates mutually of water sediment,probes into the development tendency of soil and water loss in Changjiang basin.

The results indicated that the sediment concentration of lower reaches in Nandu river,Changhua river and Wanquan river is much from April to November and is less in January,February,March and De-cember.

On Geological Features and Genesis Study of the Wangxia Gold Deposit in Changjiang Area Hainan Province;

High-tech Agricultural Development in Changjiang, Dongfang and Ledong, Hainan

The ratio of SiO 2/ (Al 2O 3+Fe 2O 3) is 2 2～2 6 (type Ⅰ ) or 2 8～3 2 (type Ⅱ ) and the ratio of SiO 2/Al 2O 3 is 3 2～3 7 (type Ⅰ ) or 3 9～4 3 (type Ⅱ ) in Changjiang argillic phyllite, Hainan The contents of negative compositions are 0 52%～0 98% for MgO, 3 11～3 59% for (K 2O+Na 2O), 0 017%～0 036% for SO 3, 0 0029%～0 0039% for Cl - All the above parameters are confored the demands of quality.

Temporal and spatial distribution of different mercury species in precipitation of Wujiang River Basin;

A Preliminary Analysis of Genetic Diversity of Population of Onychostoma sima in Wujiang River with Microsatellite Markers

Methylmercury concentrations of inflows and outflows in cascade reservoirs in Wujiang River were determined by distillation-ethylation(GC-CVAFS) technique in 2006.