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19.3819.5018.63-0.62%4.03%华北22.1020.6118.757.23%17.87%华中33.0037.6732-12.40%3.13%华南29.1730.7728.10-5.20%3.81%西南27.2530.4729.78-10.57%-8.50%