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《粮食科技与经济》2017,(1)
利用小麦具有比其他粮食品种耐高温的特性,减少冬季粮堆降温幅度,当进入第一、二、三年秋冬季节时,先自然通风,然后利用湿冷天气,采用0.55 k W小功率风机进行下行吸出式机械通风,适当降低上层基础粮温,确保整体储粮安全;气温上升季节则对仓房采取隔热密闭、仓顶喷淋等一系列控温措施,在低能耗的情况下,可有效控制粮温上升的幅度,也减少了因通风降温而产生水分散失造成的储粮损耗,计划出库前,利用雨雾潮湿天气进行下行式通风调质。经过4年常规储藏,小麦整体损耗率控制在2.96‰,其中平房仓损耗率控制在3.79‰,而立筒仓则溢余率为0.37‰,且小麦品质达到有关要求,并降低储粮成本。 相似文献
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低温储粮可抑制粮食的呼吸作用,减少干物质的损耗。从而保持粮食的品质稳定,延长粮食的储存年限。同时可抑制害虫和微生物的繁殖,减少熏蒸药剂的使用,是“绿色储粮”的理想方式之一。利用冬季较低的温度进行机械通风降低粮温,也是达到低温储粮的有效措施。离心式风机虽然具备通风时间短、降温较快等优点,但也存在功耗大, 相似文献
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华南沿海地区常年高温高湿,在现有楼房仓仓储设施条件下,依靠常规储粮方式很难达到理想的控温效果,易影响粮食品质。本文结合生产实际,针对楼房仓包打围散储小麦,在4—10月高温季节合理利用谷物冷却机以及与局部通风、控温措施相结合,能很好地抑制粮食呼吸,降低粮温,保持储粮品质,同时降低储粮损耗。 相似文献
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谈竹笼排风扇通风降温储粮张佑林,成湘军随着储粮通风技术的发展,各地采用了多种不同的方法,目的都是降低粮温,保持粮食新鲜度,确保储粮安全。但怎样利用最少的能耗,设置合理的通风系统,达到最佳的通风效果,仍是我们面临的实质课题。近年,我库对竹笼、排风扇通风... 相似文献
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对粮仓仓外安装的不锈钢和PVC两种不同材质的环流管道,通过在高温季节对环流管道的温度、仓温、粮温等进行实仓对比试验。结果表明:仓外安装的PVC环流管道比安装的不锈钢环流管道对稻谷低温储粮更为有利,且安全、经济、有效、实用。 相似文献
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We analyze the role of farm stock management on price volatility under liquidity constraints and heterogeneous price expectations. In commodity markets, speculative behaviors by stockholders tend to reduce price volatility, but this is not the case in certain agricultural markets, where speculation by farmers regarding decisions to sell or store grain is subject to liquidity constraints and heterogeneous price expectations. Like stockholders, most farmers sell grain if they expect a price drop in the near future, but unlike stockholders, they are not necessarily able to purchase grain if they expect a price increase in the next period. Heterogeneous price expectations can also lead to suboptimal storage decisions, further increasing price volatility. For these reasons, the storage management behavior of farmers often fails to mitigate price drops in the way that speculation by stockholders does. We merge historical data on maize prices and household storage collected in Burkina Faso in order to build a dynamic panel over the 2005–2012 period. We show that carryover from one season to the next is associated with unexpected price drops during the preceding lean season and that carryover is associated with more frequent unexpected price drops following the subsequent post‐harvest season. 相似文献