Research on Water Requirement of Agricultural and Livestock Products in Sanjiang Plain Based on Virtual Water

Based on the theory of water,in the paper we present the containing of water content of units agricultural and livestock products in Sanjiang Plain,and then analyze the definat-ion and connotation of water.With the Sanjiang Plain as a case,the water content of agricultural products unit calculation methods and the concept of water flow calculation are analyzed.By comparing water content of the Sanjiang Plain and Chinese crop,identify reasons of the agricultural units water content in Sanjiang Plain lower than the average,point out the advantages of development of the Sanjiang Plain virtual water economy.Finally,exposit the shortcomings in the study of water and the grain shortage and security issues in China.