現(xian)在(zai)市場基(ji)本有兩種(zhong)(zhong)(zhong)包(bao)裝(zhuang)形式(shi)，一(yi)種(zhong)(zhong)(zhong)為普通的包(bao)裝(zhuang)，利用(yong)聚丙稀(xi)塑料編(bian)織袋對(dui)大(da)米(mi)進(jin)行包(bao)裝(zhuang)，包(bao)裝(zhuang)過程中不(bu)施加任何的保(bao)鮮(xian)技術(shu)，這種(zhong)(zhong)(zhong)包(bao)裝(zhuang)對(dui)于(yu)大(da)米(mi)的防(fang)蟲及(ji)防(fang)霉等方面的效果差。還有一(yi)種(zhong)(zhong)(zhong)是(shi)用(yong)真(zhen)空(kong)(kong)包(bao)裝(zhuang)技術(shu)對(dui)包(bao)裝(zhuang)袋進(jin)行抽真(zhen)空(kong)(kong)，真(zhen)空(kong)(kong)鈄技術(shu)對(dui)大(da)米(mi)的儲存有較好的保(bao)鮮(xian)作用(yong)，但用(yong)于(yu)大(da)米(mi)自身的形狀及(ji)真(zhen)空(kong)(kong)度的選擇并不(bu)合適，目前大(da)米(mi)真(zhen)空(kong)(kong)包(bao)裝(zhuang)選用(yong)的真(zhen)空(kong)(kong)度一(yi)般在(zai)-0.07～-0.09kPa之(zhi)間(jian)，只(zhi)要(yao)真(zhen)空(kong)(kong)度在(zai)范圍內，所(suo)出廠的就(jiu)是(shi)合格產品。