大麦秸秆还田旱整机插水稻氮肥用量与运筹试验

在大麦秸秆还田与水田旱整的基础上,为探讨氮肥用量对水稻茎蘖动态和产量结构等的影响,进行了与旱整措施配套的氮肥用量与运筹试验。结果表明:水稻生育期施纯氮21 kg/667 m2,且基肥、蘖肥与穗肥质量运筹比例分别为40%、20%与40%时,其群体茎蘖变化平稳,穗粒结构协调合理,小区产量达到最高,可为秸秆还田条件下指导水稻生产提供依据。

Nitrogen Fertilizer Application Rate and Management Strategy for Mechanically Transplanted Rice in a Field with Barley Straw Incorporated into Soil and Prepared under the Dried Condition

The present study assessed the effects of nitrogen fertilizer application rate and management strategy on tiller development and yield components of mechanically transplanted rice in a paddy field with barley straw fully incorporated into the soil and prepared under the dried condition.Rice tillers developed steadily and grain was reasonable in the treatment with nitrogen fertilizers applied at 21kg/667m2 and the following management strategy:the proportions of N-fertilization at basal,tillering,and panicle stages were 40%,20%, and40%,respectively.Consequently,this treatment resulted in a high plot yield.Thus,the present study provides a scientific reference for rice production in the field with barley straw fully incorporated into soil.