What is meant by mechanized paddy land preparation technology? What are the problems? What is the development trend and characteristics?

Mechanized paddy land preparation technology is through mechanical field plowing, leveling, in order to facilitate the mechanization of rice seeding rice transplanting operation technology. The use of paddy cultivator, paddy drive harrow, rotary tiller, slurry machine, disc plough and other paddy cultivation mechanization technology, to ensure that the paddy soil crushing effect and leveling after ploughing, has the role of labor-saving cost, water saving, etc.. Paddy land preparation is the basis of rice transplanting, land preparation quality directly affects the quality of rice transplants. In recent years, with the development of agricultural machinery, rotary tiller land preparation is widely promoted, so that the quality of rice land preparation has improved. But there are still many problems in the process of paddy land preparation. First, the turning time is too late, the depth of tillage is too shallow, the soil structure is not good, directly affecting the growth and development of rice roots; Second, the pool is small and string irrigation phenomenon is common in many rice areas, which is not conducive to rice fertilization, weeding, and other field management, the land utilization rate is not high, the third is the canal system is not smooth, wells are not reasonable, the water supply to the field is not timely. If these problems are not well solved, it will affect the development of rice production and the improvement of rice yield less (no-)tillage tillage cultivation technology continues to be applied and developed; rotary tillage-based simplified tillage process is gradually replacing the dry plowing sunburrow - harrowing - leveling as the main content of the traditional tillage process; combination of tillage cultivation mechanization technology because of the High productivity and low cost.