Nitrate Assimilation during Vegetative Regrowth of Alfalfa |
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| Authors: | Vance C P Heichel G H |
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| Institution: | United States Department of Agriculture, Science and Education Administration, Agricultural Research, The University of Minnesota, St. Paul, Minnesota 55108. |
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| Abstract: | Dry matter accumulation, nitrate reductase activity of various organs, nitrate accumulation, nitrogen derived from nitrate, and nitrogen content were studied during 17 days of vegetative regrowth of harvested (detopped) alfalfa (Medicago sativa L.). Seedlings were grown in the glasshouse and treated with 0, 40, and 80 kilograms N per hectare applied as K15NO3 to determine whether reduced nitrogenase activity after shoot harvest limited vegetative regrowth. The role of nodules in reducing NO3− during this period of low nitrogenase activity was also investigated. |
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