Effect of irrigation regimes and nitrogen rates on water use efficiency and nitrogen uptake in maize

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• 作者：Yaosheng Wang^a ; ^b ; ^{wangyaosheng@caas.cn} ; Baldur Janz^c ; Tine Engedal^b ; Andreas de Neergaard^b
• 关键词：Deficit irrigation ; Partial root-zone irrigation ; Water level ; δ13C ; δ15N
• 刊名：Agricultural Water Management
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：179
• 期：Complete
• 页码：271-276
• 全文大小：631 K
• 卷排序：179

文摘

PRI and DI under moderately and severely watering levels had similar WUE and significantly lower plant N uptake compared to well-watered treatment. PRI plants had the highest δ13C indicating the better control of stomata compared to DI plants.. PRI and DI plants had significantly higher plant δ15N than FI treatment, indicating a greater contribution of N from soil organic N pool to N uptake. Sustaining high water levels in PRI wet soil zone is critical for improving N uptake.