Release Characteristics and Yield Increase Effect of Late-rice Special Controlled-release Fertilizer

Field experiments were carried out to test the effects of controlled-release fertilizer on soil nitrogen supply and rice yield.Results showed that late-rice special controlled-release fertilizer have the better control effect to the nitrogen in the beginning period of the transplantation.Compared with compound fertilizer,controlled-release fertilizer could siginficantly decrease the contents of NH+4-N in flooded rice paddy after 10-days application.In middle and late period of duration,the controlled-release fertilizer can provide more nitrogen and enhance the crops yield and quality in some degree.