近年来我国粮食连续丰收 ,国家库存大大增加 ,致使我国粮食收储企业库存量大幅度升高 ,特别是仓内储存已经爆满 ,仓房告急，尽管国家投资５００亿元进行建仓 ,但仍有３０ %的粮食为露天储藏———即外垛储存。由于外垛粮食与环境只有一层蓬布相隔 ,易受外界环境影响 ,在一定程 In recent years, the continuous harvest of grain in our country has greatly increased the inventory of our country. As a result, the inventories of grain storage and storage enterprises in our country have risen sharply. In particular, the storage in warehouses has been full and warehouses are in an emergency. Despite the state’s investment of 50 billion yuan for establishing warehouses, The food for the open storage --- that is, storage outside the stack. As the outer stack of food and the environment only a layer of tarpaulin, vulnerable to the external environment, at a certain distance