Preliminary Studies on Growth and Cultural Techniques of Dry Seedbed Seedlings for Mechanized Transplanting of Rice in Sichuan

The growth characters and cultural techniques of dry seedbed seedlings for mechanized transplanting were studies with the methods of field experiments. The results showed as follows: there were lower seedlings qualities of dry seedbed seedlings for mechanized transplanting than normal dry seedbed seedlings and seedlings raised on plastic trays. The tillers emergency of mechanized transplanting seedlings was lately, and had higher tillering speed in full-tillering stage. Mechanized transplanting rice had higher effective panicles, but lower spikelets per ears, seed-setting rate and filling rate of grains. The fittest sowing density of dry seedbed seedlings for mechanized transplanting was 75g/tray (28cm×58cm) and seedlings ages were 35-40d. From the experiments, formed the technology of dry seedbed seedlings for mechanized transplanting those raised on yard ground too.