本试验的目的就是探讨在不影响粮堆“冷心”的情况下,利用谷物冷却机和膜下环流熏蒸回流管道直接降低表层粮温,冷气不必通过地上笼和粮堆中下层,而通过粮面回风网络直接输送到粮堆表层,降低上层粮温,以达到常年低温储粮和降低谷物冷却成本的目的。1材料与方法1.1材料1.1.1供试 The purpose of this experiment is to explore the use of grain cooler and sub-membrane fumigation return pipelines to directly lower the surface grain temperature without affecting the “cold heart” of the grain piles. The cold air does not have to pass through the ground cages and middle and lower layers of the grain piles. Surface air return network directly transported to the surface of the grain pile, reducing the upper grain temperature, in order to achieve perennial low temperature grain storage and reduce the cost of grain cooling purposes. 1 Materials and Methods 1.1 Materials 1.1.1 for the test