近些年来,由于养殖对虾经济效益十分显著,各地沿海市县纷纷建立对虾养殖场和育苗场。目前,有的沿海市县对虾育苗场建的较多,养殖面积也在不断扩大,出现了虾苗供过于求的状况。又由于对虾育苗和对虾养成的成本增高,故经济效益逐年下降。目前,修建一个1000立方米水体的对虾育苗场,最少需要投资100多万元。可是,每年从4月初到6月初只能育1次虾苗就闲置起来 In recent years, due to the economic benefits of farmed shrimp is very significant, coastal counties around the county have set up shrimp farms and nurseries. At present, some coastal cities and counties shrimp nursery built more breeding area is also expanding, there has been the situation of oversupply of shrimp. And because of raising the cost of shrimp nursery and shrimp cultivation, so economic efficiency declined year by year. At present, the construction of a 1000 cubic meters of water prawn nursery, at least need to invest about 1000000 yuan. However, each year from early April to early June, only one breeding potatoes to idle