【摘要】 本文基于田间试验,研究了不同灌溉方式对玉米氮素吸收及氮素利用效率的影响。结果表明,玉米籽粒吸氮量高于茎秆吸氮量,占总吸氮量的60%以上;在地下滴灌方式玉米籽粒吸氮量、茎秆吸氮量和总吸氮量都高于其他处理;氮肥利用率与土壤氮素依存率之间存在极显著的负相关关系,氮肥利用率在0.05水平,滴灌带埋深30cm处理和滴灌带埋深15cm处理与喷灌处理差异显著,说明地下滴灌方式与喷灌方式比可以显著提高氮素利用率。更多还原

【Abstract】 Based on field experiment,studied on the influence of the different irrigation methods for the nitrogen uptake and utilization efficiency.The results showed that N accumulation of maize kernel is more than its of maize haulm,is more than 60% of the total N accumulation.N accumulation of total maize,maize kernel and haulm is more than them of other treatment.Relationship between utilization rate of nitrogen fertilizer and soil nitrogen dependent rate is extremely significant negative correlation.Utilization rate of nitrogen fertilizer at the 0.05 level,difference between drip irrigation belt 30 cm depth treatment,drip irrigation belt 15 cm depth and sprinkler irrigation treatment is significant,the way of subirrigation can significantly improve the utilization efficiency of nitrogen.更多还原