华北地区高大平房仓稻谷控温储粮情况研究

Research on the Temperature-Controlled Storage of Paddy in Warehouse of Northern China

对华北地区某高大平房仓的稻谷空调控温储藏情况进行了监测研究。结果表明:度夏期间,利用空调控温技术,仓房内空间温度和表层平均粮温可有效控制在22℃以下,但同一粮层不同位点温度差异大,在粮堆表层、西墙、南墙附近局部位置粮温仍会出现高于25℃的情况。受夏季外界环境高温影响,粮堆中心与侧壁附近温差10℃以上,存在“冷心热皮”引起的水分迁移现象。水分和温度在距离粮堆表层和仓房侧壁0.5 m附近易升高,成为霉菌易滋生的重点部位,同时,也是发芽率降低和脂肪酸值易升高的位置。因此,在控温储粮过程中需加强对粮堆表层和仓房侧壁粮情的监控。

In this paper,paddy storage in a warehouse where temperature is controlled by air-conditioning was monitored and studied,in Northern China.During the summer,using air-conditioning temperature control technology,the warehouse temperature and the average grain temperature on the surface can be effectively controlled below 22℃,but the temperature at different locations of the same grain layer varies greatly.The grain temperature in local areas near the surface of the grain pile,the west wall,and the south wall are still above 25℃.Affected by the high temperature of the external environment in summer,the temperature difference between the center of the grain pile to the side wall is more than 10℃,and there is water migration happening caused by“cold heart and hot skin”.Moisture and temperature tend to rise at a distance of 0.5 m from the surface of the grain pile and the side wall of the warehouse,which makes it a key place where mold is easy to grow.At the same time,it is also the location where the germination rate decreases and the fatty acid value increases.Therefore,in the process of temperature-controlled grain storage,it is necessary to strengthen the monitoring of the grain condition on the surface of the grain pile and the side wall of the warehouse.