湘北提引灌区双季稻“减氮增苗”丰产栽培技术集成与示范

Integration and Demonstration of High Yield Cultivation Technique of “Reducing Nitrogen Fertilizer and Increasing Seedling” on Double Cropping Rice in Lifting Irrigation Area in Northern Hunan

依托国家粮食丰产科技工程,2015年在湘北提引灌区开展双季优质稻"减氮增苗"丰产栽培技术集成与示范。结果表明:"减氮增苗"的杂交早稻、常规早稻平均产量分别比常规模式增加7.9%、6.3%;"减氮增苗"的杂交晚稻、优质常规晚稻平均产量分别比常规模式增加6.2%、4.9%,增产效果明显,且优质常规稻在"减氮增苗"技术下的增产效果与杂交稻差异不明显。综合其他因素考虑,认为优质常规稻的"减氮增苗"应是今后重点推广的丰产增效模式。

Based on the national grain bumper science and technology project, in 2015, the integration and demonstration of highyield cultivation technique of ＂reducing nitrogen fertilizer and increasing seedling＂ on high quality double cropping rice was lunchedin northern Hunan lifting irrigation area. The results showed that ＂reducing nitrogen fertilizer and increasing seedling＂ early hybridrice and early conventional rice average yield respectively increased by 7.9% and 6.3% than conventional mode; late hybrid rice andlate conventional rice average yield obviously increase of 6.2%, 4.9% respectively than in normal mode, the yield increasing effect ofhigh quality conventional rice and hybrid rice under the technology of ＂reducing nitrogen fertilizer and increasing seedling＂ had nosignificant difference. Considering other factors, it is considered that ＂reducing nitrogen fertilizer and increasing seedling＂ of high qualityconventional rice should be the key to promote the high yield and efficiency model in the future.