Rice is native to Asia and Africa, and can be divided into Asian rice and African rice. The history of rice cultivation in Africa can be traced back to more than 3,500 years ago. Rice in Asia is much earlier than in Africa. Archaeologists discovered rice planted artificially 10,000 years ago in Hunan, 3000-5000 years earlier than other countries that planted rice earlier in the world.

China is the first country in the world to grow rice. Rice is one of the most important food crops in the world today, and more than half of the world's population takes rice as the main food source. In modern times, Chinese scientists have made rare contributions to rice research in the world: Academician Yuan Longping is known as the "father of hybrid rice", Academician Zhu Yingguo has made outstanding contributions to hybrid rice research, and farmer Hu Daishu invented new year's ratooning rice and so on.

Growth cycle of rice:

The growth cycle of early-maturing varieties is usually about 60-90 days, and that of late-maturing varieties is usually about 2 10-240 days. Rice needs more nutrients, so it can be combined with decomposed organic fertilizer at seedling stage, urea at growth stage and potassium dihydrogen phosphate at heading stage.