Abstract: Abstract: Ring tone by 5% calcium effervescent tablets on the application effect on rice research, results showed that application of 5% rice calcium effervescent tone ring has a certain effect of dwarfing plants and lodging, to increase by grain and improve yield an evident result. Down against the poor, reproductive effects of short duration varieties of better lodging resistance strong, long growth period varieties. Appropriate dose of315-450 g/hm2.