【摘要】 在老式房式仓仓外安装气体分配箱,粮堆内布设探管网,用于分布气体,粮面采用薄膜密封,利用仓外PH3发生器,进行膜下PH3与CO2混合熏蒸试验。试验结果表明PH3浓度分布均匀,均匀度大于0.83;熏蒸期间气密性较好,平均浓度下降率为4.5%/d;熏蒸28天后散气,杀虫效果良好,粮堆内储粮害虫死亡率达到100%。更多还原

【Abstract】 Gas distribution boxes were equipped outside the old warehouse,and ducts were equipped inside grain bulk to distribute gas.Grain bulk was sealed with film,then mixed fumigation with PH₃ and CO₂ was carried out under film through PH₃ generator outside the warehouse,.The results showed the distribution of PH₃ was uniform,and the rate of low-concentration to high-concentration was higher than 0.83;gastightness was well during fumigation,the lowering rate of mean concentration was 4.5%/d.The mortality of stored-grain insects was 100% after fumigation for 28 days.更多还原