Nitrogen status of functionally different forage species explains resistance to severe drought and post-drought overcompensation

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• 作者：Daniel Hofer^a ; ^b ; Matthias Suter^a ; ^{matthias.suter@agroscope.admin.ch} ; Nina Buchmann^b ; ^{nina.buchmann@usys.ethz.ch} ; Andreas Lü ; scher^a ; ^{andreas.luescher@agroscope.admin.ch}
• 关键词：Drought stress ; Intensively managed grassland ; Nitrogen nutrition index ; Post-drought recovery ; Root growth ; Symbiotic dinitrogen fixation
• 刊名：Agriculture, Ecosystems & Environment
• 出版年：2017
• 出版时间：2 January 2017
• 年：2017
• 卷：236
• 期：Complete
• 页码：312-322
• 全文大小：798 K
• 卷排序：236

文摘

Soil N available to forage species was strongly reduced under drought. Legumes were less N-limited under drought than non-legumes. Symbiotic N2 fixation in legumes was maintained under drought, improving their drought resistance. N fertilisation improved drought resistance of non-legumes. Overcompensation of non-legume yield during post-drought was due to an increase in plant-available soil N.