表：全国样本饲料企业玉米周度库存（单位：天）地区本周上周去年同期周环比较去年同比东北21.2521.6322.25-1.73%-4.49%华北19.2719.9623.91-3.46%-22.65%华中40.0039.3334.671.69%16.5%华南30.1329.9729.230.56%7.36%西南33.5733.5035.070.20%1.67%