Applied Research on Controlling Stored-grain Insects with Nitrogen

摘要

Under sealed conditions, oxygen was separated from the atmosphere by a homemade high purity nitrogen generator for grain storage to generate high-purity nitrogen. High-purity nitrogen was dispersed and distributed uniformly in the bulk through re-circulation pipe under film. To control storedgrain insects,the concentration of nitrogen was maintained above 95% for at least 19 days, which made insects under long-term hypoxic circumstance and finally die for lack of the necessary amount of oxygen. In addition, oxygen concentration below 5% decreased the rate of wheat physiological metabolic activity, respiration, quality deterioration, and growth of grain-storage microbes. It increased wheat security in storage.