高大平房仓粮面投药的PH_3环流熏蒸生产应用报告

河南郑州铭功国家粮食储备库进行了高大平房仓散装小麦粮面投药环流熏蒸的应用。结果表明 :环流 19小时左右粮堆内PH3 浓度趋于均匀 ,且最低浓度与最高浓度比值为0 .59,以后浓度比值均大于 0 .59,均远高于国外资料推荐的浓度均匀性标准 ,即大于 0 .2 5。可见PH3环流熏蒸系统促进PH3气体在粮堆内均匀分布 ,并且取得良好的杀虫效果

A FIELD REPORT ON PH_3 RECIRCULATION FUMIGATION IN LARGE WAREHOUSE

PH 3 recirculation fumigation to bulk wheat in large warehouse was tested in Minggong State Grain Storage,Henan.The results showed that PH 3 concentration trended to uniform when exposed for about 19 hours,and the rate of min-concentration to max-concentration was 0.59 and above later on.It was higher than 0.25,the concentration uniformity standard in abroad materials.So PH 3 recirculation fumigation can improve well-distribution of PH 3 in grain bulk,and effectively control the stored-grain insects.