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萝卜贮藏在北方地区采用地下沟窖,这种贮藏窖构造简单,实用经济。其最主要的缺点是沟窖的上层与下层温度差异很大,沟底的温度往往偏高(超过萝卜贮藏的适宜温度2～4℃),易引起下层萝卜发芽、糠心,造成损失,为了解决这个问题,我们对地下沟窖的设计作了一些改进,收到了良好效果。改良沟窖的结构改良沟窖与普通地沟的结构基本相同,主要区别就是在普通地沟的基础上增设了一套通风系统(包括通风道、排气筒和进气筒)。该系统靠自然温度、热冷空气循环和对流来进行窖内的通风换气,维持适宜的低温环境。改良沟窖的结构如图1、2所示。1、深度和宽度沟窖的深浅和宽度直接影响到贮藏期间的温度,因此应根据当地的气温和地温变化
Radish storage in the northern region using underground ditches, this storage pit structure is simple, practical and economical. The main disadvantage is that there is a great difference between the temperature of the upper layer and the lower layer of the ditch pit. The temperature at the ditch bottom is often high (exceeding the appropriate temperature for storage of radish by 2~4 ° C.), causing the lower radish to germinate and cause heart loss, To solve this problem, we made some improvements to the design of underground ditches and received good results. The structure of the improved ditches is basically the same as that of the ordinary ditches. The main difference is the addition of a ventilation system (including ventilation ducts, exhaust ducts and air intake ducts) on the basis of ordinary ditches. The system relies on natural temperature, hot and cold air circulation and convection to ventilate the ventilation in the pit, and maintain a suitable low temperature environment. Improved ditch pit structure shown in Figure 1,2. 1, depth and width Ditch depth and width of the pits directly affect the temperature during storage, it should be based on local temperature and ground temperature changes