Screening Agricultural Products Suitable For Mixing With Rice And Designing A Storage Device For Mildew Proof

Due to the lack of simple and effective storage technology, the grain loss rates remain high. Food loss and mildew during storage is worrying. Combined with the present situation of grain storage technology and its international development, designing a green grain storage technology will be of urgent necessity.Meanwhile, mixed cultivation technology in agricultural production practices at home and abroad has aroused people’s attention. People make full use of different crops to draw on the advantages and avoid the disadvantages of benign interaction, such as flexible application of Allelopathy and other plant interaction, the reasonable collocation of different crops in the same area to grow, so as to improve the single grain yield per unit area. Similarly, it is reported that kelp, which has a special smell of volatile agriculture, was stored with rice by some farmers in China.Based on principle of allelopathy, this paper presents a new concept of green grain:mixing rice with different agricultural products aiming to utilize their antimicrobial activity to prolong the storage period of rice.Filter out suitable agricultural products combined storage with rice is one of the key points of this paper. We hope that these products is common, relatively inexpensive and easy to obtain. They must have a significant antibacterial activity, in particular, of a selective inhibition to such mainly fungal causing mildew of rice as Penicillium, AspergillusFirstly, rice was stored with six agricultural products respectively including ginger, garlic and chillies, peppercorns, star anise, and seaweed under the simulated natural storage environment. All these products have a special smell. Results showed that kelp, peppercorns, and star anise could extend the storage period and lessen the mold the rice under the same conditions. It has been concluded that kelp, peppercorns, star anise and fennel can effectively inhibit the mold of rice, and the antibacterial effect of kelp is the most evident.In order to verify the inhibitory effect of the kelp, peppercorns, and star anise, we designed a PDA Tablet culture upside down experiment. Results showed that Petri dish covered with kelp, Sichuan peppercorns, and star anise powder on the inversion of the medium inoculation of Penicillium fell less than the control group, with the group mixed with kelp generating the least number of bacteria. Experiments show that kelp, peppercorns, and star anise can inhibit the growth of Penicillium, and the inhibitory effect of kelp remains the most obvious.The gas chromatography mass spectrometry (GC/MS) analysis the anhydrous diethyl ether extract concentrate of kelp, showed that 43 kinds of chemical compounds are detected. With reference to the related literature, it is concluded that oleic acid,2,11 hexadecenoic acid, eicosapentaenoic acid, ring decyl diene, tetraethyl orthosilicate, hydroxy benzene acetone ethyl butyrate,5-8-11-14 eicosatetraenoic acid ethyl ester, these seven chemical substances may be the main volatile antibacterial substances of kelp.Contact type of kelp powder bacteriostatic experiment was designed to further explore the kelp inhibition mechanism. It was found that, compared with ordinary PD Amedium, adding seaweed powder PDA could inhibit the growth of Penicillium under the same conditions. Contact flat inverted culture experiments show that kelp powder is able to inhibit the growth of Penicillium. Also, it is found that the antibacterial effect of antibacterial experiment of kelp is stronger than that of bacteriostatic experiment of non-contact.Based on experimental data and literature, determining the inhibitory effects when mixed with rice may be a combination of the two components antibacterial activity:kelp Laminaria japonica and acrylic acid, esters of bacteriostasis of volatile substances, and laminarin nonvolatile active components.Finally, it aims to design a mixing storage device of rice and seaweed. This device can effectively inhibit the rice mold, prolong the storage period of rice and realize the easy separation of rice and seaweed.