Ratooning rice becomes food security technology reserve

Many years' practice shows that ratooning rice is a resource-saving and efficient rice cropping system, which is beneficial to improve the comprehensive production capacity and multiple cropping index of rice fields. In recent years, nearly 100000 mu of ratoon rice has been planted in Youxi County, Fujian Province, with an average yield of 600kg per mu in the first season and 300kg per mu in the ratooning season. Since 2000, Fuzhou National Rice improvement Sub-Center of Fujian Academy of Agricultural Sciences has continuously obtained an average yield of 838kg / mu in the first season and 488.4 kg / mu in the ratooning season, 723.9 kg / mu in the first season, 414.1 kg / mu in the ratooning season, 605.9 kg / mu in the first season of 100000 mu of ratooning rice and 297.8 kg / mu in the ratooning season. There are 200 million mu of single cropping rice fields in southern China, of which 50 million mu of single cropping rice fields (one crop temperature and light resources are more than one crop and two crops are insufficient) are suitable for planting ratooning rice. If it can reach the yield level of Youxi County in Fujian Province, it can increase 20 million tons of rice per year. The development of ratooning rice is a big technical reserve to ensure China's food security in the future.

In the future, we will carry out the screening of new super rice varieties with strong ratooning ability for many years, the physiological basis of ratooning and high yield of super rice, and cooperate with the Chinese Academy of Sciences to carry out the physiological research on photosynthesis of ratooning rice with high yield. including the physiological characteristics of photooxidation in ratooning season. Study on the transport and transformation mechanism of C and N elements in super rice, the interaction network regulation of ratooning high yield genes, the cloning of genes related to strong ratooning ability through genetic analysis, and the molecular mechanism of these genes. The root development characteristics of ratooning and high yield of super rice, the morphological structure of growth and development of ratooning axillary buds, the expression characteristics of related genes, and the molecular biological and physiological basis of high yield. the molecular mechanism of ratooning and high yield of super rice, the coordination of sink, source and flow and the physiological basis of high yield cultivation were analyzed, which laid the foundation for the analysis of the molecular biological basis of ratooning and high yield of super rice and the further popularization and application of ratooning rice. To provide technical support for solving the national food security.