Design of air-suction rice precision nursing equipment with seed fixed by paper band

The agronomy experimental results indicate that sowing quantity and seedling quality are the main restricting factors for good quality and high yield of rice. An important measure for increasing rice yield is to apply the advanced precision seeding technology to cultivate high quality rice seedlings. To solve the problem of rice nursing seedlings in greenhouse, such as high investment at a time, and difficulty in getting vegetation soil for seedling tray as well as too much details in raising seedlings etc., after having analyzed the existing technology and equipment for rice precision seeding of tray nursing seedlings both at home and abroad, authors put forward a method of raising seedlings fitting for no tray precision seeding based on the agronomic requirements. The seeds were hold, positioned and enclosed in paper. The suction precision seeding device for nursing rice seedling was developed, in which the seeds were positioned and fixed with paper precisely. The experimental results indicate that the rate of single-seed each hole was more than 80%, and the qualified index (1-2 seeds each hole) is over 95%. The rate of multiple-seed(≥3 seeds each hole) was less than 4%. The qualified seed-space was over 90%, and the enclosing performance of the paper band for fixing seed is reliable, and seedlings are stocky and have strong rooting ability after being transplanted.