Research on Effect of Two Temperature-controlled Grain Storage Techniques on Quality Change of Northeast Japonica Rice

In this paper, two kinds of temperature control technology in grain storage including air conditioning and inner circulation were carried out in actual warehouse quality test of northeast japonica rice to analyzed the changes of grain condition, storage quality, cooking quality, texture quality and change of energy consumption. The results showed that both technologies can keep the warehouse temperature at 20 ℃～25 ℃and the surface grain temperature was within 23 ℃, but air conditioning for controlling temperature effect was more obvious, and the inner circulation grain storage had better water retention effect, the moisture content of surface japonica rice decreased by only 0.2%, and the operating cost was lower; During storage,the moisture content, taste score value, pH value of rice soup, viscosity and elasticity of rice all showed a decreasing trend in two warehouse, and fatty acid value, water absorption and expansion rate of rice, rice hardness, conglutination and chewing were on the rise, in the process of storage, both kinds of grain storage technology can effectively delay the quality deterioration of japonica rice, ensure the safety of northeast japonica rice for summer and achieve the green storage with good quality.