Agrifood safety is the important issue in agricultural development and the study of food policy. Influenced by the food and healthy problem around the world, spotted by mad cow disease (BSE), foot-and-mouth disease (FMD), dioxin (PCDD/Fs) and avian flu etc., the food quality and safety has been getting reinforced by the international community. The disharmonious development and use of the environment and resources for a long time leads to the serious pollution of agricultural environment, which cause the un...