精品文档---下载后可任意编辑不同施氮量和基追比对豫北高产麦田花后氮代谢、产量及土壤硝态氮的影响的开题报告摘要豫北地区是我国重要的冬麦种植区，施氮和基追是促进冬麦生长和增产的重要措施。本讨论以豫北高产麦田为讨论对象，讨论不同施氮量和基追比对花后氮代谢、产量及土壤硝态氮的影响。结果表明，施氮量对麦田氮代谢和产量有显著影响，适宜的施氮量能够提高麦田产量和品质，但过量施氮会导致土壤硝态氮过高和麦田品质下降。基追比对麦田氮代谢和产量影响不明显，但适当增加基追比可以减轻氮素追肥的压力，降低土壤硝态氮含量。本讨论对豫北高产麦田的科学管理具有指导意义。关键词：豫北高产麦田；施氮量；基追比；氮代谢；产量；土壤硝态氮AbstractYubei region is an important winter wheat planting area in China, and nitrogen application and basal fertilizer application are important measures to promote wheat growth and increase yield. In this study, Yubei high-yielding wheat fields were selected as the research object to study the effect of different nitrogen application rates and basal fertilizer application ratios on nitrogen metabolism, yield and soil nitrate nitrogen after flowering. The results showed that nitrogen application rate had a significant impact on nitrogen metabolism and yield of wheat fields. Appropriate nitrogen application rate could improve the yield and quality of wheat fields, but excessive nitrogen application would lead to high soil nitrate nitrogen and degraded wheat quality. The effect of basal fertilizer application ratio on nitrogen metabolism and yield of wheat fields was not obvious, but increasing the ratio appropriately could reduce the pressure of nitrogen topdressing and lower the content of soil nitrate nitrogen. This study has guiding significance for the scientific management of Yubei high-yielding wheat fields.Keywords: Yubei high-yielding wheat field; nitrogen application rate; basal fertilizer application ratio; nitrogen metabolism; yield; soil nitrate nitrogen
