晚稻三级专用控释肥的氮素释放规律及其增产效应

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

采用随机区组试验,研究了晚稻三级专用控释肥氮素释放规律及其对晚稻产量和稻米品质的影响。结果表明:晚稻专用控释肥在水稻移栽初期对氮素有较好的控制效果,施肥后10 d稻田淹水中铵态氮含量控释肥处理明显低于一般复合肥;在晚稻生长中后期三级专用控释肥能提供比其它肥料较多的氮素营养;晚稻三级专用控释肥能提高产量,也能一定程度地提高稻米品质。

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 NH4^＋ -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.