Soil salinization is a serious problem in agriculture, which affects the agricultural production and ecological environments, and leads to a great reduction output in rice. The total acreage of salinizes and alkaline land is about 1/3 of the irrigated land in the world. In our country the salt disperative soil is about 1/5 of arable land and it will be expanded in the future. The production loss caused by soil salinization is too large to be estimated. In addition, decrease of arable land and sh...