Salinization of soils is an increasingly threat to agriculture, forest and environment. There are 0.96 billion hectares of salted soil worldwide amounting to one third of the total terrestrial area on earth. There are about 100 million hectares of salted soil in our country that severely limits agricultural production. How to use and develop the salted soil in order to increase crop production and improve environment is one of the top projects all over the world. Many scientists have done their b...