Based on the day by day air temperature and rainfall data of 14 weather stations over the source region of the three rivers(Yangtze,Yellow and Lancangjiang rivers),the evolution law of the extreme cold,warm,dry and wet climatic events as well as cause of its variations are analyzed.

based on the day by day air temperature and rainfall data 14 weather stations over the source of three rivers, the evolution rule of the extreme cold, warm, dry and wet climatic event as well as its variation reason over this area is analyzed.

Critical dehumidified state during dehumidification drying.;

Effect of continuous submerging and wetting-redrying on cadmium speciation and uptake by Sorghum hybrid Sudangrass in a Ferric-accumulic Stagnic Anthrosol and a Tipical Hapludult collected from the Taihu Lake region and the rolling downs of Yingtan,Jiangxi,China respectively,was studied by pot experiment with Cd spike in 2003.