| 李春喜，杨明达，马守臣，杨慎骄，张素瑜，关小康，王同朝.氮肥基追比对冬小麦调亏灌溉的调控作用[J].麦类作物学报,2015,35(6):820 |
| 氮肥基追比对冬小麦调亏灌溉的调控作用 |
| Effect of the Nitrogen Fertilizer Ratio of Basal Application and Top Dressing on Physiological Traits and Yield of Winter Wheat under Regulated Deficit Irrigation |
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| DOI：10.7606/j.issn.1009-1041.2015.06.13 |
| 中文关键词: 氮肥基追比 调亏灌溉 冬小麦 光合速率 根系活力 产量稳定性 |
| 英文关键词:Ratio of basal N and top dressing N Regulated deficit irrigation Winter wheat Photosynthetic rate Root activity Yield stability |
| 基金项目:国家“十二五”科技支撑计划项目(2012BAD14B08,2012BAD04B07) |
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| 中文摘要: |
| 为了解氮肥基追比对冬小麦调亏灌溉的调控作用，比较分析了2种氮肥基追比（10∶0和6∶4）下调亏灌溉（水分亏缺阶段为返青至拔节期）对冬小麦产量和水分利用效率的影响差异。结果表明，返青至拔节期水分调亏显著降低冬小麦的叶面积，抽穗后在充分供水条件下对根系活力的影响表现出较长后效，且降低了花后旗叶MDA的积累速率，最终显著提高了产量及水分利用效率。与氮肥基追比10∶0处理相比，6∶4处理下开花期冬小麦的叶面积显著增加，抽穗后在土壤自然干旱条件下灌浆期光合速率明显提高，花后旗叶MDA含量降低，稳产性增强。可见，在冬小麦生育后期土壤水分较好的情况下，返青至拔节期水分调亏对产量有正效应；生育后期土壤较干旱情况下，追施氮肥可以提高冬小麦的抗旱能力。 |
| 英文摘要: |
| A plot experiment was conducted to explore the effect of the basal and top dressing N ratio (10∶0 and 6∶ 4) on the yield and physiological traits of winter wheat under regulated deficit irrigation. The results showed that water deficit from returning green to jointing stage significantly reduced leaf area of winter wheat,well water promoted root activity after heading stage,and reduced the accumulation rate of MDA content in flag leave after anthesis,which resulted in significant increase of water use efficiency and grain yield of winter wheat eventually. Compared with the treatment of basal N to top dressing N ratio of 10∶0,the treatment of basal N to top dressing N ratio of 6∶4 significantly improved leaf area of winter wheat after anthesis,significantly increased photosynthetic rate of winter wheat during grain filling and reduced the content of MDA in flag leaf after anthesis under the progressive soil dying condition after heading stage. The treatment of basal N to top dressing N ratio of 6∶4 also increased yield stability. The results indicated that water deficit from returning green to jointing stage positively increase grain yield if soil water condition was well at the late growth stage,and increasing top dresseing N could potentially improve drought resistance of winter wheat when soil water condition was lower at the late growth stage. |
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